dias November 2, 2016 Supersymmetric Aspects of QCD from Light-Front Holography by Stanley J. Brodsky (SLAC/Stanford University) Superconformal algebra leads to remarkable connections between the masses of mesons and baryons of the same parity -- supersymmetric relations between the bosonic and fermionic bound states of QCD. Supercharges connect the mesonic eigenstates to their baryonic superpartners, where the mesons have internal angular momentum one unit higher than the baryons. One also predicts the existence of tetraquarks which are degenerate in mass with baryons with the same angular momentum. An effective supersymmetric light-front Hamiltonian for hadrons composed of light quarks can be constructed by embedding superconformal quantum mechanics into AdS space. The breaking of conformal symmetry determines a unique quark-confining light-front potential for light hadrons including spin-spin interactions in agreement with the soft-wall AdS/QCD approach and light-front holography. The mass-squared of the light hadrons can be expressed as a frame-independent decomposition of contributions from the constituent kinetic energy, the confinement potential, and spin-spin contributions. The mass of the pion eigenstate vanishes in the chiral limit. Only one mass parameter appears; it sets the confinement mass scale, a universal value for the slope of all Regge trajectories, the nonzero mass of the proton and other hadrons in the chiral limit, as well as the mass parameter of the pQCD running coupling. The result is an effective coupling defined at all momenta. The matching of the high and low momentum-transfer regimes determines a scale Q0 which sets the interface between perturbative and nonperturbative hadron dynamics. as well as the factorization scale for structure functions and distribution amplitudes. This procedure, in combination with the scheme-independent PMC procedure for setting renormalization scales, can greatly improve the precision of QCD predictions.
dias June 2, 2016 at 15:30 Baryon and Nuclear Masses from Lattice QCD by Martin Savage (Washington) Mass 2016 Talks Thursday June 2 Strong-coupling approaches to lattice QCD are useful since they allow for analytical investigations and can lead to alternative simulation algorithms if a sign problem is present. To go beyond the strong-coupling limit, the gauge action needs to be included. In the past, several ideas to induce the gauge action by means of auxiliary fields were proposed. Here, we follow a proposal of Budczies and Zirnbauer (BZ), which has the unique advantage of using only a small number of auxiliary bosons. We show, by a combination of analytical and numerical results, that the BZ discretization has a continuum limit in the Yang-Mills universality class. Using this discretization, we can change the order of integration in the QCD path integral to arrive at formulations in which the gauge fields have been integrated out. We briefly discuss such dual representations of lattice QCD. [/flvcp3] Abelian and non-Abelian (2+1)-d Chern-Simons theories describe gauge fields, whose mass is of topological origin. Such theories are interesting because they give rise to anyons, whose braiding may allow universal topological quantum computation. We consider lattice Chern-Simons theories with a doubled set of degrees of freedom, associated with both the original and the dual lattice. In the Hamiltonian formulation, the Chern-Simons term then manifests itself in non-trivial commutation relations between the operators associated with a cross formed by an original link and the corresponding dual link. In the large "photon" mass limit, a doubled Abelian U(1) lattice Chern-Simons theory reduces to Kitaev's toric code, a topologically robust storage device for quantum information. We also construct doubled non-Abelian Chern-Simons theories with discrete gauge groups S3, D8, and Δ_{27}, which resemble features of O(2), SU(2), and SU(3) gauge theories, respectively. The relation of these models to Kitaev's non-Abelian quantum double models as well as their confining dynamics are also investigated. [/flvcp3] I will outline recent work revising the standard picture of gravitational waves from phase transitions in the early universe, and prospects for detection of a first order electroweak transition in the coming era of gravitational wave astronomy. [/flvcp3] On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO). The measurement of these ripples would ultimately lead to the first direct detection of gravitational waves, the first observation of a binary black hole, and the identification of a new class of stellar-mass black holes. In this talk, I trace the history of gravitational waves from Einstein to the LIGO detection. I describe the properties of the first gravitational-wave source (dubbed GW150914) and discuss the implications for gravitational-wave astronomy. I conclude with a discussion of some of the promising new research directions that have emerged in the wake of GW150914. [/flvcp3] The status of Lattice QCD calculations of the baryons and lightest nuclei is reviewed. Preliminary decompositions of these masses that may be of interest are presented. [/flvcp3]
dias June 2, 2016 at 14:00 The first detection of gravitational waves and beyond by Eric Thrane (LIGO, Monash) Mass 2016 Talks Thursday June 2 Strong-coupling approaches to lattice QCD are useful since they allow for analytical investigations and can lead to alternative simulation algorithms if a sign problem is present. To go beyond the strong-coupling limit, the gauge action needs to be included. In the past, several ideas to induce the gauge action by means of auxiliary fields were proposed. Here, we follow a proposal of Budczies and Zirnbauer (BZ), which has the unique advantage of using only a small number of auxiliary bosons. We show, by a combination of analytical and numerical results, that the BZ discretization has a continuum limit in the Yang-Mills universality class. Using this discretization, we can change the order of integration in the QCD path integral to arrive at formulations in which the gauge fields have been integrated out. We briefly discuss such dual representations of lattice QCD. [/flvcp3] Abelian and non-Abelian (2+1)-d Chern-Simons theories describe gauge fields, whose mass is of topological origin. Such theories are interesting because they give rise to anyons, whose braiding may allow universal topological quantum computation. We consider lattice Chern-Simons theories with a doubled set of degrees of freedom, associated with both the original and the dual lattice. In the Hamiltonian formulation, the Chern-Simons term then manifests itself in non-trivial commutation relations between the operators associated with a cross formed by an original link and the corresponding dual link. In the large "photon" mass limit, a doubled Abelian U(1) lattice Chern-Simons theory reduces to Kitaev's toric code, a topologically robust storage device for quantum information. We also construct doubled non-Abelian Chern-Simons theories with discrete gauge groups S3, D8, and Δ_{27}, which resemble features of O(2), SU(2), and SU(3) gauge theories, respectively. The relation of these models to Kitaev's non-Abelian quantum double models as well as their confining dynamics are also investigated. [/flvcp3] I will outline recent work revising the standard picture of gravitational waves from phase transitions in the early universe, and prospects for detection of a first order electroweak transition in the coming era of gravitational wave astronomy. [/flvcp3] On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO). The measurement of these ripples would ultimately lead to the first direct detection of gravitational waves, the first observation of a binary black hole, and the identification of a new class of stellar-mass black holes. In this talk, I trace the history of gravitational waves from Einstein to the LIGO detection. I describe the properties of the first gravitational-wave source (dubbed GW150914) and discuss the implications for gravitational-wave astronomy. I conclude with a discussion of some of the promising new research directions that have emerged in the wake of GW150914. [/flvcp3] The status of Lattice QCD calculations of the baryons and lightest nuclei is reviewed. Preliminary decompositions of these masses that may be of interest are presented. [/flvcp3]
dias June 2, 2016 at 11:30 Gravitational waves from a first order electroweak phase transition by Mark Hindmarsh (Sussex) Mass 2016 Talks Thursday June 2 Strong-coupling approaches to lattice QCD are useful since they allow for analytical investigations and can lead to alternative simulation algorithms if a sign problem is present. To go beyond the strong-coupling limit, the gauge action needs to be included. In the past, several ideas to induce the gauge action by means of auxiliary fields were proposed. Here, we follow a proposal of Budczies and Zirnbauer (BZ), which has the unique advantage of using only a small number of auxiliary bosons. We show, by a combination of analytical and numerical results, that the BZ discretization has a continuum limit in the Yang-Mills universality class. Using this discretization, we can change the order of integration in the QCD path integral to arrive at formulations in which the gauge fields have been integrated out. We briefly discuss such dual representations of lattice QCD. [/flvcp3] Abelian and non-Abelian (2+1)-d Chern-Simons theories describe gauge fields, whose mass is of topological origin. Such theories are interesting because they give rise to anyons, whose braiding may allow universal topological quantum computation. We consider lattice Chern-Simons theories with a doubled set of degrees of freedom, associated with both the original and the dual lattice. In the Hamiltonian formulation, the Chern-Simons term then manifests itself in non-trivial commutation relations between the operators associated with a cross formed by an original link and the corresponding dual link. In the large "photon" mass limit, a doubled Abelian U(1) lattice Chern-Simons theory reduces to Kitaev's toric code, a topologically robust storage device for quantum information. We also construct doubled non-Abelian Chern-Simons theories with discrete gauge groups S3, D8, and Δ_{27}, which resemble features of O(2), SU(2), and SU(3) gauge theories, respectively. The relation of these models to Kitaev's non-Abelian quantum double models as well as their confining dynamics are also investigated. [/flvcp3] I will outline recent work revising the standard picture of gravitational waves from phase transitions in the early universe, and prospects for detection of a first order electroweak transition in the coming era of gravitational wave astronomy. [/flvcp3] On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO). The measurement of these ripples would ultimately lead to the first direct detection of gravitational waves, the first observation of a binary black hole, and the identification of a new class of stellar-mass black holes. In this talk, I trace the history of gravitational waves from Einstein to the LIGO detection. I describe the properties of the first gravitational-wave source (dubbed GW150914) and discuss the implications for gravitational-wave astronomy. I conclude with a discussion of some of the promising new research directions that have emerged in the wake of GW150914. [/flvcp3] The status of Lattice QCD calculations of the baryons and lightest nuclei is reviewed. Preliminary decompositions of these masses that may be of interest are presented. [/flvcp3]
dias June 2, 2016 at 10:30 Doubled Abelian and non-Abelian Chern-Simons Gauge Theories on the Lattice by Uwe-Jens Wiese (Bern) Mass 2016 Talks Thursday June 2 Strong-coupling approaches to lattice QCD are useful since they allow for analytical investigations and can lead to alternative simulation algorithms if a sign problem is present. To go beyond the strong-coupling limit, the gauge action needs to be included. In the past, several ideas to induce the gauge action by means of auxiliary fields were proposed. Here, we follow a proposal of Budczies and Zirnbauer (BZ), which has the unique advantage of using only a small number of auxiliary bosons. We show, by a combination of analytical and numerical results, that the BZ discretization has a continuum limit in the Yang-Mills universality class. Using this discretization, we can change the order of integration in the QCD path integral to arrive at formulations in which the gauge fields have been integrated out. We briefly discuss such dual representations of lattice QCD. [/flvcp3] Abelian and non-Abelian (2+1)-d Chern-Simons theories describe gauge fields, whose mass is of topological origin. Such theories are interesting because they give rise to anyons, whose braiding may allow universal topological quantum computation. We consider lattice Chern-Simons theories with a doubled set of degrees of freedom, associated with both the original and the dual lattice. In the Hamiltonian formulation, the Chern-Simons term then manifests itself in non-trivial commutation relations between the operators associated with a cross formed by an original link and the corresponding dual link. In the large "photon" mass limit, a doubled Abelian U(1) lattice Chern-Simons theory reduces to Kitaev's toric code, a topologically robust storage device for quantum information. We also construct doubled non-Abelian Chern-Simons theories with discrete gauge groups S3, D8, and Δ_{27}, which resemble features of O(2), SU(2), and SU(3) gauge theories, respectively. The relation of these models to Kitaev's non-Abelian quantum double models as well as their confining dynamics are also investigated. [/flvcp3] I will outline recent work revising the standard picture of gravitational waves from phase transitions in the early universe, and prospects for detection of a first order electroweak transition in the coming era of gravitational wave astronomy. [/flvcp3] On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO). The measurement of these ripples would ultimately lead to the first direct detection of gravitational waves, the first observation of a binary black hole, and the identification of a new class of stellar-mass black holes. In this talk, I trace the history of gravitational waves from Einstein to the LIGO detection. I describe the properties of the first gravitational-wave source (dubbed GW150914) and discuss the implications for gravitational-wave astronomy. I conclude with a discussion of some of the promising new research directions that have emerged in the wake of GW150914. [/flvcp3] The status of Lattice QCD calculations of the baryons and lightest nuclei is reviewed. Preliminary decompositions of these masses that may be of interest are presented. [/flvcp3]
dias June 2, 2016 at 9:00 Induced QCD with two bosonic flavors by Tilo Wettig (Regensburg) Mass 2016 Talks Thursday June 2 Strong-coupling approaches to lattice QCD are useful since they allow for analytical investigations and can lead to alternative simulation algorithms if a sign problem is present. To go beyond the strong-coupling limit, the gauge action needs to be included. In the past, several ideas to induce the gauge action by means of auxiliary fields were proposed. Here, we follow a proposal of Budczies and Zirnbauer (BZ), which has the unique advantage of using only a small number of auxiliary bosons. We show, by a combination of analytical and numerical results, that the BZ discretization has a continuum limit in the Yang-Mills universality class. Using this discretization, we can change the order of integration in the QCD path integral to arrive at formulations in which the gauge fields have been integrated out. We briefly discuss such dual representations of lattice QCD. [/flvcp3] Abelian and non-Abelian (2+1)-d Chern-Simons theories describe gauge fields, whose mass is of topological origin. Such theories are interesting because they give rise to anyons, whose braiding may allow universal topological quantum computation. We consider lattice Chern-Simons theories with a doubled set of degrees of freedom, associated with both the original and the dual lattice. In the Hamiltonian formulation, the Chern-Simons term then manifests itself in non-trivial commutation relations between the operators associated with a cross formed by an original link and the corresponding dual link. In the large "photon" mass limit, a doubled Abelian U(1) lattice Chern-Simons theory reduces to Kitaev's toric code, a topologically robust storage device for quantum information. We also construct doubled non-Abelian Chern-Simons theories with discrete gauge groups S3, D8, and Δ_{27}, which resemble features of O(2), SU(2), and SU(3) gauge theories, respectively. The relation of these models to Kitaev's non-Abelian quantum double models as well as their confining dynamics are also investigated. [/flvcp3] I will outline recent work revising the standard picture of gravitational waves from phase transitions in the early universe, and prospects for detection of a first order electroweak transition in the coming era of gravitational wave astronomy. [/flvcp3] On September 14, 2015, gravitational waves from the merger of two black holes rippled through the Laser Interferometer Gravitational-wave Observatory (LIGO). The measurement of these ripples would ultimately lead to the first direct detection of gravitational waves, the first observation of a binary black hole, and the identification of a new class of stellar-mass black holes. In this talk, I trace the history of gravitational waves from Einstein to the LIGO detection. I describe the properties of the first gravitational-wave source (dubbed GW150914) and discuss the implications for gravitational-wave astronomy. I conclude with a discussion of some of the promising new research directions that have emerged in the wake of GW150914. [/flvcp3] The status of Lattice QCD calculations of the baryons and lightest nuclei is reviewed. Preliminary decompositions of these masses that may be of interest are presented. [/flvcp3]
dias June 1, 2016 at 17:10 Diphoton Excess From Minimal Composite Dynamics by Natascia Vignaroli (CP3-Origins) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias June 1, 2016 at 16:50 Unveiling asymmetric Dark Matter through gamma-ray triangles by Emiliano Molinaro (CP3-Origins) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias June 1, 2016 at 16:30 Composite Dark Matter by Oleg Antipin (Rudjer Boskovic Institute) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias June 1, 2016 at 16:00 Symmetries for low and high energy CP phases in the lepton sector by Claudia Hagedorn (CP3-Origins) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias June 1, 2016 at 15:30 Higher-order corrections in Higgs sectors of extensions of the Standard Model by Heidi Rzehak (CP3-Origins) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias June 1, 2016 at 14:00 One-Loop Corrections to the Perturbative Unitarity Bound in the CP-Conserving Two-Higgs Doublet Model with a Softly Broken Z_2 Symmetry by Christopher Murphy (Scuola Normale Superiore) Mass 2016 Talks Wednesday June 1 We compute all of the one-loop corrections that are enhanced, O(λ_i λ_j / 16 π^2), in the limit s >> |λ_i| v^2 >> M_W^2, s >> m_{12}^2 to all the 2 -> 2 longitudinal vector boson and Higgs boson scattering amplitudes in the CP-conserving two-Higgs doublet model with a softly broken Z_2 symmetry. In the two simplified scenarios we study, the typical bound we find is |λ_i(s)| < 4. Preliminary results from a comprehensive numerical fit will also be presented. Based on: 1401.0070, 1512.04567, and work in progress [/flvcp3] [/flvcp3] Leptonic low energy CP phases, of Dirac as well as Majorana type, can be predicted with the help of flavor and CP symmetries. However, the high energy CP phases in the lepton sector, relevant for leptogenesis, are in general unrelated to those at low energies and thus represent new sources of CP violation. We discuss a scenario in which all CP phases are constrained by flavor and CP symmetries. In this way, the CP violation at low and high energies becomes intimately related and, in particular, the sign of the baryon asymmetry of the Universe, generated via the mechanism of unflavored leptogenesis, is fixed. [/flvcp3] We discuss models where Dark Matter candidates arise as composite states of a new confining gauge force, stable thanks to accidental symmetries. Restricting to renormalizable theories compatible with SU(5) unification, we find 13 models based on SU(N) gauge theories and 9 based on SO(N). The two gauge groups lead to distinctive phenomenologies: SU(N) theories give complex DM, with potentially observable electric and magnetic dipole moments that lead to peculiar spin-independent cross sections; SO(N) theories give real DM, with challenging spin-dependent cross sections or inelastic scatterings. Models with Yukawa couplings also give rise to spin-independent direct detection mediated by the Higgs boson and to electric dipole moments for the electron. Each model predicts a specific set of lighter composite scalars, possibly observable at colliders. [/flvcp3] We introduce a new type of gamma-ray spectral feature, which we denominate gamma-ray triangle. This spectral feature arises in scenarios where dark matter self-annihilates via a chiral interaction into two Dirac fermions, which subsequently decay in flight into another fermion and a photon. The resulting photon spectrum resembles a sharp triangle and can be readily searched for in the gamma-ray sky. Using data from the Fermi-LAT and H.E.S.S. instruments, we find no evidence for such spectral feature and therefore set strong upper bounds on the corresponding annihilation cross section. A concrete realisation of a scenario yielding gamma-ray triangles consists of an asymmetric dark matter model where the dark matter particle carries lepton number. We show explicitly that this class of models can lead to intense gamma-ray spectral features, potentially at the reach of upcoming gamma-ray telescopes, opening a new window to explore asymmetric dark matter through indirect searches. [/flvcp3] [/flvcp3]
dias May 31, 2016 at 16:30 SU(2) Gauge Theory with Two Flavours : lattice simulations for BSM by Vincent Drach (CERN) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 31, 2016 at 15:30 Multi-Z's at the LHC within Extra Dimension and Composite Higgs models by Elena Accommando (Southampton) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 31, 2016 at 14:00 Similarities and differences between the gravity dilaton and Nambu-Goldstone dilaton by Matin Mojaza (Nordita) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 31, 2016 at 11:30 Dispersive treatment of the hadronic light-by-light contribution to (g-2)μ by Giacomo Colangelo (Bern) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 31, 2016 at 10:30 Diagnostics of Top Partners for Natural Composite Higgs by Ann Nelson (Washington) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 31, 2016 at 9:00 Coupled dark energy and dark matter from axions by Robert Brandenberger (McGill) Mass 2016 Talks Tuesday May 31 The QCD axion is a candidate for dark matter. I will explore the possibility that an axion associated with a hidden sector could provide both dark matter and dark energy. I will begin the lecture with an overview of different approaches to dark energy. [/flvcp3] I will review theories of Higgs as composite pseudo-Nambu-Goldstone Boson and explain why top partners are required for such theories to be natural. I will argue that LHC results to date, including the mild excess of di-photons with invariant mass near 750 GeV which has been recently reported by ATLAS and CMS, favor a composite Higgs. Measurements of di-Higgs production are critical for determining whether a heavy vector-like T-prime quark is indeed a top partner which cancels the ultraviolet sensitivity of the top contribution to the Higgs potential. [/flvcp3] I will describe recent progress in approaching the calculation of the hadronic light-by-light contribution to (g-2)μ with dispersive methods. I will first discuss general properties of the four-point function of the electromagnetic current in QCD, its Lorentz decomposition and dispersive representation. For what concerns the pseudoscalar pole contributions, I will give an overview of the determination of the pseudoscalar transition form factors. I will then consider the pion-loop contribution and discuss the recently proposed Mandelstam representation thereof. [/flvcp3] The word dilaton is currently used for two types of particles of seemingly different origin. One is the dilaton that appears in theories of gravity, including supergravity, string theory, and scalar-tensor theories such as Jordan-Brans-Dicke theory. The other dilaton is the Nambu-Goldstone boson appearing as a consequence of a spontaneous breaking of scale and conformal invariance. The two particles are generally speaking unrelated. Nevertheless, they share the feature of both satisfying soft theorems, according to which the scattering of a low-energy dilaton is entirely determined by symmetry properties. In this talk, I will first review the symmetry properties of the two dilatons. I will then demonstrate that both dilatons obey soft theorems through subsubleading order, which are similar, but in terms of symmetry have different origins. Finally I will discuss their differences as well as some recent applications of these newly discovered properties. [/flvcp3] The Drell-Yan di-lepton production at hadron colliders is by far the preferred channel to search for new heavy spin-1 particles. Traditionally, such searches have exploited the Narrow Width Approximation (NWA) for the signal, thereby neglecting the effect of the interference between the additional Z'-bosons and the Standard Model Z and {\gamma}. Recently, it has been established that both finite width and interference effects can be dealt with in experimental searches while still retaining the model independent approach ensured by the NWA. This assessment has been made for the case of popular single Z'-boson models currently probed at the CERN Large Hadron Collider (LHC). In this paper, we test the scope of the CERN machine in relation to the above issues for some benchmark multi Z'-boson models. In particular, we consider Non-Universal Extra Dimensional (NUED) scenarios and the 4-Dimensional Composite Higgs Model (4DCHM), both predicting a multi-Z' spectrum. We conclude that in a variety of cases, traditional search approaches based on the assumption of rather narrow and isolated objects might require suitable modifications to extract the underlying dynamics. [/flvcp3] After a general introduction arguing that strongly interacting theories offer theoretically appealing solutions to some puzzled raised by the Standard Model of particle physics I will present a simple model based on an SU(2) gauge theory with two flavours. I will show that it can be used to provide a mechanism of dynamical electroweak symmetry breaking and/or an UV completion for a composite pseudo-Goldstone Higgs model. I will then argue that lattice calculation of the strong sector alone can provide useful constraints on the effective low energy description. I will then present the lattice results and discuss, in light of them, the expected signatures at the Large Hadron Collider. [/flvcp3]
dias May 30, 2016 at 17:10 Neutrino masses and ordering via gravitational waves, photon and neutrino detections by Kasper Langæble (CP3-Origins) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 17:00 Renormalization Scheme Transformation and its Application by Gongjun Choi (Stony Brook) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 16:50 The Elementary Goldstone Higgs by Helene Gertov (CP3-Origins) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 16:40 Renormalization-group Evolution of Asymptotically Free Chiral Gauge Theories by Yanliang Shi (Stony Brook) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 16:30 ChPT with a Light Isosinglet Scalar by Martin Hansen (CP3-Origins) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 15:30 On the recent flavour anomalies by Marco Nardecchia (Cambridge) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 14:00 Combined analysis of effective Higgs portal dark matter model by Anthony Williams (Adelaide) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 11:30 Status and recent results from the CMS experiment by Yurii Maravin (CMS, Kansas State) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 10:30 Recent highligts from the LHCb experiment by Giacomo Graziani (LHCb, Firenze) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias May 30, 2016 at 9:00 Status and Recent Results from the ATLAS Experiment by Alessandro Cerri (ATLAS, Sussex) Mass 2016 Talks Monday May 30 This presentation will cover recent searches from the ATLAS experiment, with emphasis on new resonances searches and new physics. Flavour, Higgs and the status and outlook of the recent hint of a diphoton resonance will be discussed. [/flvcp3] The LHCb experiment is stress-testing the Standard Model, and challenging any of its possible extension, through precision tests of the flavour sector. I will review some of the most significant results in rare and CP-violating decays of heavy hadrons. Thanks to the detector versatility and its unique coverage of the forward region, the LHCb physics program is also expanding well beyond its original roadmap, focused on testing the CKM paradigm. A selection of some of the most recent and original results, ranging from heavy hadron spectroscopy and EW physics to soft QCD and heavy ion physics, will be presented. [/flvcp3] [/flvcp3] We combine and extend the analyses of effective scalar, vector, Majorana and Dirac fermion Higgs portal models of Dark Matter (DM), in which DM couples to the Standard Model (SM) Higgs boson via an operator of the form ODM H†H. For the fermion models, we take an admixture of scalar ψψ and pseudoscalar ψiγ5ψ interaction terms. For each model, we apply constraints on the parameter space based on the Planck measured DM relic density and the LHC limits on the Higgs invisible branching ratio. For the first time, we perform a consistent study of the indirect detection prospects for these models based on the WMAP7/Planck observations of the CMB, a combined analysis of 15 dwarf spheroidal galaxies by Fermi-LAT and the upcoming Cherenkov Telescope Array (CTA). We also perform a correct treatment of the momentum-dependent direct search cross-section that arises from the pseudoscalar interaction term in the fermionic DM theories. We find, in line with previous studies, that current and future direct search experiments such as LUX and XENON1T can exclude much of the parameter space, and we demonstrate that a joint observation in both indirect and direct searches is possible for high mass WIMPs. In the case of a pure pseudoscalar interaction of a fermionic DM candidate, future gamma-ray searches are the only class of experiment capable of probing the high mass range of the theory. [/flvcp3] In this talk I will review the status of flavour physics after the first run of the LHC and in particular I will discuss recent results from the LHCb collaboration suggesting possible deviations from the SM predictions in semileptonic B-meson decays. I will also discuss possible interpretations of these anomalies in terms of New Physics. [/flvcp3] We consider the chiral Lagrangian coupled to an isosinglet scalar and show how this leads to new radiative corrections from scalar loops. In particular we calculate the one-loop corrections to the pion mass, the pion decay constant and the scalar mass. We furthermore argue that the new contributions from the scalar loops are flavor universal at next-to-leading order i.e. independent of the chiral symmetry breaking pattern. [/flvcp3] The properties of strongly coupled chiral gauge theories remain a challenge for theoretical understanding. In this talk I will classify and explore the UV to IR evolution of several simple sets of asymptotically free chiral gauge theories. In the ultraviolet limit, these theories are free. During renormalization-group evolution, several types of behavior can occur: non-Abelian Coulomb phase, confinement with formation of massless bound states or spontaneous symmetry breaking with formation of bilinear fermion condensates. I will discuss how to use some approximation methods to study different types of IR phases in these chiral gauge theories. [/flvcp3] The Higgs as a pseudo Goldstone Boson is not only possible in a composite scenario but also possible in an elementary scenario. In the elementary scenario the theory is both renormalizable and perturbative, which means that the quantum corrections can be calculated using the Coleman-Weinberg potential while permitting to explore the underlying parameter space. By characterising the available parameter space of the extended Higgs sector we discover that the preferred electroweak alignment angle is centred around θ = 0.02, corresponding to the Higgs chiral symmetry breaking scale f = 14 TeV. [/flvcp3] One of questions that one may address about the renormalization scheme is how well finite-order perturbative results calculated in different renormalization scheme agree with one another. In this talk, we introduce a notion of renormalization scheme transformation, which maps a gauge coupling of a gauge theory obtained in a specific scheme to another one in a different scheme. Then, we present some examples of application of the scheme transformation into the β function of especially the asymptotically free gauge theory with massless fermions. Furthermore, as for N=1 Supersymmetric gauge theory, we will make comparison between IR-zeros and poles from Padé approximants to β function in DR-bar scheme and those from NSVZ β function to provide a quantitative measure of agreement between the two different renormalization schemes. [/flvcp3] [/flvcp3]
dias March 3, 2016 at 14:30 Lattice Field Theory (Lecture V) by Jarno Rantaharju (CP3-Origins) Jarno will give a mini course on Lattice Field Theory. The mini course will consist of 5 lectures of 2 hours each. All the lectures will be in the CP³ meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Path integrals and the lattice We introduce the path integral quantization, the conceptual framework of regularized quantum field theory and the connection to statistical physics. The scalar field theory provides a useful illustration. 2) Fermions We discuss the lattice regularization of fermion fields. We introduce the fermion doubling problem and the two most used fermion discretizations: Wilson fermions and staggered fermions. We discuss the symmetry properties of different discretizations. 3) Gauge fields We complete the our model by adding a lattice regularized gauge field. We discuss weak and strong coupling expansions and introduce observables related to the gauge field. 4) The continuum limit and renormalization We discuss continuum limits, critical lines and the renormalization of a lattice model with Wilson fermions. Approaching the continuum in lattice simulations is expensive, and the cost can be alleviated by improving the model at fixed lattice spacing. 5) Applications in BSM Lattice simulations are a useful tool for studying the non-perturbative structure of gauge field theories. We introduce observables for studying chiral symmetry breaking and the beta function in these models. We discuss challenges specific to beyond Standard Model physics.
dias March 1, 2016 at 14:30 Lattice Field Theory (Lecture IV) by Jarno Rantaharju (CP3-Origins) Jarno will give a mini course on Lattice Field Theory. The mini course will consist of 5 lectures of 2 hours each. All the lectures will be in the CP³ meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Path integrals and the lattice We introduce the path integral quantization, the conceptual framework of regularized quantum field theory and the connection to statistical physics. The scalar field theory provides a useful illustration. 2) Fermions We discuss the lattice regularization of fermion fields. We introduce the fermion doubling problem and the two most used fermion discretizations: Wilson fermions and staggered fermions. We discuss the symmetry properties of different discretizations. 3) Gauge fields We complete the our model by adding a lattice regularized gauge field. We discuss weak and strong coupling expansions and introduce observables related to the gauge field. 4) The continuum limit and renormalization We discuss continuum limits, critical lines and the renormalization of a lattice model with Wilson fermions. Approaching the continuum in lattice simulations is expensive, and the cost can be alleviated by improving the model at fixed lattice spacing. 5) Applications in BSM Lattice simulations are a useful tool for studying the non-perturbative structure of gauge field theories. We introduce observables for studying chiral symmetry breaking and the beta function in these models. We discuss challenges specific to beyond Standard Model physics.
dias February 25, 2016 at 14:30 Lattice Field Theory (Lecture III) by Jarno Rantaharju (CP3-Origins) Jarno will give a mini course on Lattice Field Theory. The mini course will consist of 5 lectures of 2 hours each. All the lectures will be in the CP³ meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Path integrals and the lattice We introduce the path integral quantization, the conceptual framework of regularized quantum field theory and the connection to statistical physics. The scalar field theory provides a useful illustration. 2) Fermions We discuss the lattice regularization of fermion fields. We introduce the fermion doubling problem and the two most used fermion discretizations: Wilson fermions and staggered fermions. We discuss the symmetry properties of different discretizations. 3) Gauge fields We complete the our model by adding a lattice regularized gauge field. We discuss weak and strong coupling expansions and introduce observables related to the gauge field. 4) The continuum limit and renormalization We discuss continuum limits, critical lines and the renormalization of a lattice model with Wilson fermions. Approaching the continuum in lattice simulations is expensive, and the cost can be alleviated by improving the model at fixed lattice spacing. 5) Applications in BSM Lattice simulations are a useful tool for studying the non-perturbative structure of gauge field theories. We introduce observables for studying chiral symmetry breaking and the beta function in these models. We discuss challenges specific to beyond Standard Model physics.
dias February 23, 2016 at 14:30 Lattice Field Theory (Lecture II) by Jarno Rantaharju (CP3-Origins) Jarno will give a mini course on Lattice Field Theory. The mini course will consist of 5 lectures of 2 hours each. All the lectures will be in the CP³ meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Path integrals and the lattice We introduce the path integral quantization, the conceptual framework of regularized quantum field theory and the connection to statistical physics. The scalar field theory provides a useful illustration. 2) Fermions We discuss the lattice regularization of fermion fields. We introduce the fermion doubling problem and the two most used fermion discretizations: Wilson fermions and staggered fermions. We discuss the symmetry properties of different discretizations. 3) Gauge fields We complete the our model by adding a lattice regularized gauge field. We discuss weak and strong coupling expansions and introduce observables related to the gauge field. 4) The continuum limit and renormalization We discuss continuum limits, critical lines and the renormalization of a lattice model with Wilson fermions. Approaching the continuum in lattice simulations is expensive, and the cost can be alleviated by improving the model at fixed lattice spacing. 5) Applications in BSM Lattice simulations are a useful tool for studying the non-perturbative structure of gauge field theories. We introduce observables for studying chiral symmetry breaking and the beta function in these models. We discuss challenges specific to beyond Standard Model physics.
dias February 18, 2016 at 14:30 Lattice Field Theory (Lecture I) by Jarno Rantaharju (CP3-Origins) Jarno will give a mini course on Lattice Field Theory. The mini course will consist of 5 lectures of 2 hours each. All the lectures will be in the CP³ meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Path integrals and the lattice We introduce the path integral quantization, the conceptual framework of regularized quantum field theory and the connection to statistical physics. The scalar field theory provides a useful illustration. 2) Fermions We discuss the lattice regularization of fermion fields. We introduce the fermion doubling problem and the two most used fermion discretizations: Wilson fermions and staggered fermions. We discuss the symmetry properties of different discretizations. 3) Gauge fields We complete the our model by adding a lattice regularized gauge field. We discuss weak and strong coupling expansions and introduce observables related to the gauge field. 4) The continuum limit and renormalization We discuss continuum limits, critical lines and the renormalization of a lattice model with Wilson fermions. Approaching the continuum in lattice simulations is expensive, and the cost can be alleviated by improving the model at fixed lattice spacing. 5) Applications in BSM Lattice simulations are a useful tool for studying the non-perturbative structure of gauge field theories. We introduce observables for studying chiral symmetry breaking and the beta function in these models. We discuss challenges specific to beyond Standard Model physics.
dias January 28, 2016 at 14:30 Functional Renormalization Group (Lecture IV) by Alessandro Codello (CP3-Origins) The mini course on the Functional Renormalization Group consists of 4 lectures of 1-2 hours. All the lectures will be in the CP3 meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Renormalization group and exact flow equations We review the conceptual framework underlying the renormalization group (RG) approach and introduce its modern implementation via an exact RG flow equation for the scale dependent effective action. 2) Approximations: vertex, derivative and loop expansions The exact RG flow equation is generally to difficult to be solved exactly: approximations schemes are key to its practical use. We introduce the three basic approximations commonly used and discuss their merits, in this way starting to get used to the formalism. 3) Scalar theories and their (functional) fixed points in arbitrary dimensions We study scalar theories in arbitrary dimensions via the local potential approximation, assuming no prior knowledge of the theory. In the process we will describe the Wilson-Fisher fixed point in d = 3 and “discover” the CFT minimal models in d = 2. We also show how compute in a non-perturbative way universal quantities like critical exponents and discuss how to control the error on these estimations. 4) Perturbative vs non-perturbative beta functions We discuss the relation between the usual perturbative RG approach and the non-perturbative approach based on the exact RG flow equation discussed in the previous lectures. The case of the computation of the two loop beta function for a d = 4 scalar theory is particularly illuminating and we will use it as an example.
dias January 21, 2016 at 14:30 Functional Renormalization Group (Lecture III) by Alessandro Codello (CP3-Origins) The mini course on the Functional Renormalization Group consists of 4 lectures of 1-2 hours. All the lectures will be in the CP3 meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Renormalization group and exact flow equations We review the conceptual framework underlying the renormalization group (RG) approach and introduce its modern implementation via an exact RG flow equation for the scale dependent effective action. 2) Approximations: vertex, derivative and loop expansions The exact RG flow equation is generally to difficult to be solved exactly: approximations schemes are key to its practical use. We introduce the three basic approximations commonly used and discuss their merits, in this way starting to get used to the formalism. 3) Scalar theories and their (functional) fixed points in arbitrary dimensions We study scalar theories in arbitrary dimensions via the local potential approximation, assuming no prior knowledge of the theory. In the process we will describe the Wilson-Fisher fixed point in d = 3 and “discover” the CFT minimal models in d = 2. We also show how compute in a non-perturbative way universal quantities like critical exponents and discuss how to control the error on these estimations. 4) Perturbative vs non-perturbative beta functions We discuss the relation between the usual perturbative RG approach and the non-perturbative approach based on the exact RG flow equation discussed in the previous lectures. The case of the computation of the two loop beta function for a d = 4 scalar theory is particularly illuminating and we will use it as an example.
dias January 19, 2016 at 14:30 Functional Renormalization Group (Lecture II) by Alessandro Codello (CP3-Origins) The mini course on the Functional Renormalization Group consists of 4 lectures of 1-2 hours. All the lectures will be in the CP3 meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Renormalization group and exact flow equations We review the conceptual framework underlying the renormalization group (RG) approach and introduce its modern implementation via an exact RG flow equation for the scale dependent effective action. 2) Approximations: vertex, derivative and loop expansions The exact RG flow equation is generally to difficult to be solved exactly: approximations schemes are key to its practical use. We introduce the three basic approximations commonly used and discuss their merits, in this way starting to get used to the formalism. 3) Scalar theories and their (functional) fixed points in arbitrary dimensions We study scalar theories in arbitrary dimensions via the local potential approximation, assuming no prior knowledge of the theory. In the process we will describe the Wilson-Fisher fixed point in d = 3 and “discover” the CFT minimal models in d = 2. We also show how compute in a non-perturbative way universal quantities like critical exponents and discuss how to control the error on these estimations. 4) Perturbative vs non-perturbative beta functions We discuss the relation between the usual perturbative RG approach and the non-perturbative approach based on the exact RG flow equation discussed in the previous lectures. The case of the computation of the two loop beta function for a d = 4 scalar theory is particularly illuminating and we will use it as an example.
dias January 14, 2016 Functional Renormalization Group (Lecture I) by Alessandro Codello (CP3-Origins) The mini course on the Functional Renormalization Group consists of 4 lectures of 1-2 hours. All the lectures will be in the CP3 meeting room at 14:30 and will be recorded. The topics of the lectures are: 1) Renormalization group and exact flow equations We review the conceptual framework underlying the renormalization group (RG) approach and introduce its modern implementation via an exact RG flow equation for the scale dependent effective action. 2) Approximations: vertex, derivative and loop expansions The exact RG flow equation is generally to difficult to be solved exactly: approximations schemes are key to its practical use. We introduce the three basic approximations commonly used and discuss their merits, in this way starting to get used to the formalism. 3) Scalar theories and their (functional) fixed points in arbitrary dimensions We study scalar theories in arbitrary dimensions via the local potential approximation, assuming no prior knowledge of the theory. In the process we will describe the Wilson-Fisher fixed point in d = 3 and “discover” the CFT minimal models in d = 2. We also show how compute in a non-perturbative way universal quantities like critical exponents and discuss how to control the error on these estimations. 4) Perturbative vs non-perturbative beta functions We discuss the relation between the usual perturbative RG approach and the non-perturbative approach based on the exact RG flow equation discussed in the previous lectures. The case of the computation of the two loop beta function for a d = 4 scalar theory is particularly illuminating and we will use it as an example.
dias May 19, 2015 at 16:20 Magnetized relativistic plasma as a Weyl metal by Volodya Miransky (Western University) MASS 2015 Talks Tuesday May 19, 2015 I discuss several quantities that are central to our understanding of strong interaction dynamics and the exploration of the limits of the Standard Model, using numerical simulation of QCD on a space-time lattice. To this end I focus on the determination of structural properties of the nucleon, which has received special attention recently because of the proton radius puzzle. Secondly, I will discuss attempts to compute the hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon. [/flvcp3] [/flvcp3] Rare flavour-changing decays provide can probe well beyond the energy frontier and provide one of the most promising windows into TeV scale dynamics and beyond. I review key observables and recent theoretical and experimental results, and briefly comment on prospects for the near to medium term future. [/flvcp3] I will start by recalling the basic small- and large-field variants of inflation, emphasizing their UV sensitivity and the need for a UV completion, for example by string theory. Motivated by experimental searches for gravity waves or tensor modes, I will then focus on large-field models. In particular, I will discuss general no-go arguments against this version of inflation which are based on gravitational instantons and the so-called weak-gravity conjecture. Then I will turn to possible loopholes in those arguments and explain how certain string-theoretic constructions might, nevertheless, be able to realize large-field inflation. Some basic features of string compactifications and the string theory landscape will also be discussed. [/flvcp3] It has become recently established that a magnetized relativistic plasma yields an interesting example of a Weyl metal. I discuss the properties of magnetized relativistic plasma and its possible role in some astrophysics phenomena and heavy ion collisions. [/flvcp3]
dias May 19, 2015 at 15:10 Large-Field Inflation and String Theory by Arthur Hebecker (Heidelberg) MASS 2015 Talks Tuesday May 19, 2015 I discuss several quantities that are central to our understanding of strong interaction dynamics and the exploration of the limits of the Standard Model, using numerical simulation of QCD on a space-time lattice. To this end I focus on the determination of structural properties of the nucleon, which has received special attention recently because of the proton radius puzzle. Secondly, I will discuss attempts to compute the hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon. [/flvcp3] [/flvcp3] Rare flavour-changing decays provide can probe well beyond the energy frontier and provide one of the most promising windows into TeV scale dynamics and beyond. I review key observables and recent theoretical and experimental results, and briefly comment on prospects for the near to medium term future. [/flvcp3] I will start by recalling the basic small- and large-field variants of inflation, emphasizing their UV sensitivity and the need for a UV completion, for example by string theory. Motivated by experimental searches for gravity waves or tensor modes, I will then focus on large-field models. In particular, I will discuss general no-go arguments against this version of inflation which are based on gravitational instantons and the so-called weak-gravity conjecture. Then I will turn to possible loopholes in those arguments and explain how certain string-theoretic constructions might, nevertheless, be able to realize large-field inflation. Some basic features of string compactifications and the string theory landscape will also be discussed. [/flvcp3] It has become recently established that a magnetized relativistic plasma yields an interesting example of a Weyl metal. I discuss the properties of magnetized relativistic plasma and its possible role in some astrophysics phenomena and heavy ion collisions. [/flvcp3]
dias May 19, 2015 at 13:30 Recent developments in flavour physics by Sebastian Jäger (University of Sussex) MASS 2015 Talks Tuesday May 19, 2015 I discuss several quantities that are central to our understanding of strong interaction dynamics and the exploration of the limits of the Standard Model, using numerical simulation of QCD on a space-time lattice. To this end I focus on the determination of structural properties of the nucleon, which has received special attention recently because of the proton radius puzzle. Secondly, I will discuss attempts to compute the hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon. [/flvcp3] [/flvcp3] Rare flavour-changing decays provide can probe well beyond the energy frontier and provide one of the most promising windows into TeV scale dynamics and beyond. I review key observables and recent theoretical and experimental results, and briefly comment on prospects for the near to medium term future. [/flvcp3] I will start by recalling the basic small- and large-field variants of inflation, emphasizing their UV sensitivity and the need for a UV completion, for example by string theory. Motivated by experimental searches for gravity waves or tensor modes, I will then focus on large-field models. In particular, I will discuss general no-go arguments against this version of inflation which are based on gravitational instantons and the so-called weak-gravity conjecture. Then I will turn to possible loopholes in those arguments and explain how certain string-theoretic constructions might, nevertheless, be able to realize large-field inflation. Some basic features of string compactifications and the string theory landscape will also be discussed. [/flvcp3] It has become recently established that a magnetized relativistic plasma yields an interesting example of a Weyl metal. I discuss the properties of magnetized relativistic plasma and its possible role in some astrophysics phenomena and heavy ion collisions. [/flvcp3]
dias May 19, 2015 at 10:40 Hadrons in Vacuum and in Medium in an Effective Chiral Approach by Dirk Rischke (Frankfurt) MASS 2015 Talks Tuesday May 19, 2015 I discuss several quantities that are central to our understanding of strong interaction dynamics and the exploration of the limits of the Standard Model, using numerical simulation of QCD on a space-time lattice. To this end I focus on the determination of structural properties of the nucleon, which has received special attention recently because of the proton radius puzzle. Secondly, I will discuss attempts to compute the hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon. [/flvcp3] [/flvcp3] Rare flavour-changing decays provide can probe well beyond the energy frontier and provide one of the most promising windows into TeV scale dynamics and beyond. I review key observables and recent theoretical and experimental results, and briefly comment on prospects for the near to medium term future. [/flvcp3] I will start by recalling the basic small- and large-field variants of inflation, emphasizing their UV sensitivity and the need for a UV completion, for example by string theory. Motivated by experimental searches for gravity waves or tensor modes, I will then focus on large-field models. In particular, I will discuss general no-go arguments against this version of inflation which are based on gravitational instantons and the so-called weak-gravity conjecture. Then I will turn to possible loopholes in those arguments and explain how certain string-theoretic constructions might, nevertheless, be able to realize large-field inflation. Some basic features of string compactifications and the string theory landscape will also be discussed. [/flvcp3] It has become recently established that a magnetized relativistic plasma yields an interesting example of a Weyl metal. I discuss the properties of magnetized relativistic plasma and its possible role in some astrophysics phenomena and heavy ion collisions. [/flvcp3]
dias May 19, 2015 at 9:00 Low-energy Precision Observables and the Role of Lattice QCD by Hartmut Wittig (Mainz) MASS 2015 Talks Tuesday May 19, 2015 I discuss several quantities that are central to our understanding of strong interaction dynamics and the exploration of the limits of the Standard Model, using numerical simulation of QCD on a space-time lattice. To this end I focus on the determination of structural properties of the nucleon, which has received special attention recently because of the proton radius puzzle. Secondly, I will discuss attempts to compute the hadronic vacuum polarisation contribution to the anomalous magnetic moment of the muon. [/flvcp3] [/flvcp3] Rare flavour-changing decays provide can probe well beyond the energy frontier and provide one of the most promising windows into TeV scale dynamics and beyond. I review key observables and recent theoretical and experimental results, and briefly comment on prospects for the near to medium term future. [/flvcp3] I will start by recalling the basic small- and large-field variants of inflation, emphasizing their UV sensitivity and the need for a UV completion, for example by string theory. Motivated by experimental searches for gravity waves or tensor modes, I will then focus on large-field models. In particular, I will discuss general no-go arguments against this version of inflation which are based on gravitational instantons and the so-called weak-gravity conjecture. Then I will turn to possible loopholes in those arguments and explain how certain string-theoretic constructions might, nevertheless, be able to realize large-field inflation. Some basic features of string compactifications and the string theory landscape will also be discussed. [/flvcp3] It has become recently established that a magnetized relativistic plasma yields an interesting example of a Weyl metal. I discuss the properties of magnetized relativistic plasma and its possible role in some astrophysics phenomena and heavy ion collisions. [/flvcp3]
dias May 22, 2014 at 16:30 Dynamical mass generation by gauge flavor dynamics by Jiří Hošek (NPI) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 15:40 Dark matter searches and astrophysical neutrinos in IceCube by Jason Koskinen (NBI) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 14:20 Theta dependence of 4D SU(N) gauge theories by Ettore Vicari (Pisa) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 13:30 Constraints on matter from asymptotic safety by Roberto Percacci (SISSA) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 11:10 Chiral symmetry and Quarkyonic vs. Superfluid/Color-Supercondor phases in SU(N) gauge theories at high density by Terry Tomboulis (UCLA) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 10:20 On massive gauge theories beyond perturbation theory by Pilar Hernández Gamazo (Valencia) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 22, 2014 at 9:00 Exploring the Universe at the highest energies with the Pierre Auger Observatory by Karl-Heinz Kampert (Wuppertal) MASS 2014 Talks Thursday May 22, 2014 Much progress has been made in observations of the most energetic particles in Nature but major puzzles remain to be solved. In particular, a flux suppression of cosmic rays has been observed above 5x10^19 eV, such as expected from photo-pion production by protons propagating through the CMB (GZK-effect). However, data from the Pierre Auger Observatory, the worlds largest cosmic ray observatory located in Argentina, show a shift towards heavier primary particles above 5x10^18 eV and suggest seeing the maximum energy of cosmic particle accelerators rather than energy losses by propagation effects. We shall review the experimental data and discuss its consequences. Observing particles up to 10^20 eV enable tests also of particle and of fundamental physics, such as features of hadronic interaction at energies up to sqrt(s)=100 TeV, as well as tests Lorentz invariance and smoothness of space-time structure. We shall end the presentation by outlining plans for the near-term future and discussing the prospects and future challenges of UHECR physics. [/flvcp3] We discuss the simplest non-perturbative formulation of a massive SU(2) gauge theory on the lattice, which is equivalent to a non-linear chiral model. We search for lines of constant physics and find a scaling region where both a triplet vector and singlet scalar remain light. We discuss the structure of the effective theory describing the dynamics of these light degrees of freedom. [/flvcp3] The regime of (asymptotically) high quark chemical potential $\mu$ is of great physical interest; arguments over many years have suggested the possibility of superfluidity or color superconductivity phases in this region of the phase diagram. This large $\mu$ regime, however, has been largely inaccessible to direct numerical simulation due to the complex fermion determinant problem. Even in the case of theories with real determinant, such as two-color QCD, MC simulations with light fermions appear at least an order of magnitude more challenging than at zero density. In recent years concrete results have been obtained on the lattice starting from the strong coupling end by a combination of simulations in special partition function representations, sophisticated mean field analysis, and simulations in two-color QCD. Recently, cluster expansions shown to converge at large $\mu$ have produce definitive results at strong coupling. After reviewing these results we will show how the cluster expansion method can be extended to all gauge couplings in the case of theories with real determinant and discuss the resulting physical picture. [/flvcp3] The existence of a nontrivial fixed point with finitely many relevant directions is a sufficient condition for an UV complete and predictive QFT. There is evidence for the existence of such a fixed point for pure gravity. I will discuss constraints on the number of scalar, fermion and vector fields minimally coupled to gravity, arising from the existence of the fixed point. [/flvcp3] The dependence of 4D SU(N) gauge theories on the topological theta term is discussed at zero and finite temperature, in particular in the large-N limit. General arguments and numerical analyses (exploiting the lattice formulation) show that the theta dependence drastically changes across the deconfinement transition. The low-T phase is characterized by a large-N scaling with theta/N as relevant variable, while in the high-T phase the scaling variable is just theta and the free energy is essentially determined by the instanton-gas approximation. [/flvcp3] Abstract: The IceCube neutrino observatory at the South Pole includes a cubic kilometer of instrumented ice which serves as a unique telescope for exploring the cosmos. The physics portfolio of the project covers searches for neutrino emission from the annihilation of dark matter and the observation of astrophysical neutrinos and searches for their possible sources. I will cover the most recent dark matter results in addition to the IceCube astrophysical neutrino results. I will conclude with prospects for next generation detector upgrades that will improve sensitivity at the both the O(1) GeV and > O(100) TeV energies. [/flvcp3] See arXiv:1401.7503. [/flvcp3]
dias May 21, 2014 at 16:30 Scale invariant extensions of the SM with strongly interacting hidden sector by Pyungwon Ko (KIAS) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 15:40 Progress towards an a-theorem by Ian Jack (Liverpool) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 14:20 Exact Scale Breaking and Novel Higgs Potentials by Steven Abel (Durham IPPP) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 13:30 Axion-like Particles from Strings by Andreas Ringwald (DESY) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 11:10 Conformal Electroweak Symmetry Breaking and implications for neutrinos and dark matter by Manfred Lindner (MPI, Heidelberg) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 10:20 WISPy Cold Dark Matter by Joerg Jaeckel (Heidelberg) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 21, 2014 at 9:00 Shedding light on (WIMP) dark matter with LUX by Henrique Araujo (Imperial College London) MASS 2014 Talks Wednesday May 21, 2014 The Large Underground Xenon experiment is searching for interactions of galactic dark matter particles in a 250 kg liquid xenon target. LUX features a double-phase xenon Time Projection Chamber at its core, and operates in a low background environment at the 4850-ft level of the Sanford Underground Research Facility, South Dakota, USA. Results from its first science run completed in 2013 put new constraints on the elastic scattering of Weakly Interacting Massive Particles (WIMPs) off nucleons. Very low energy threshold for nuclear recoil detection and novel calibration techniques have allowed a 20-fold improvement in sensitivity for low mass WIMPs relative to the previous leading experiment, changing the landscape of direct searches for light WIMPs. The null result from LUX can only be reconciled with controversial signal claims by other experiments under the most contrived set of astrophysical, particle physics and experimental assumptions. I will describe the experiment and this significant result, and discuss future prospects as LUX enters a longer science run in 2014. [/flvcp3] Very light bosons, produced non-thermally in the early Universe are an intriguing possibility for the cold dark matter of the Universe. Particularly interesting candidates are axions, axion-like particles and hidden photons. This talk will discuss the current status of such light dark matter with a particular emphasis towards opportunities for its detection. [/flvcp3] New ideas about the role of conformal symmetry for electro-weak symmetry breaking will be discussed in general and some models will be described in detail. Some interesting implications for neutrino physics and dark matter will also be discussed. [/flvcp3] There are various puzzling astrophysical and cosmological phenomena which may be explained by the existence of light axion-like particles (ALPs) with a tiny coupling to two photons. For example, the anomalous transparency of the universe for gamma rays may be explained by oscillations of photons into sub-microeV mass ALPs (and vice versa) in ambient magnetic fields and a recently found unidentified X-ray line may arise from the two photon decay of a keV mass ALP comprising a part or even the total of dark matter. In this talk, we will discuss how such ALPs may arise naturally from strings. [/flvcp3] We present a gauge mediation principle for theories where exact UV scale invariance is broken in a hidden sector. The relevant configurations are those in which the visible sector and a hidden sector emanate from a scale invariant pair of UV theories that communicate only via gauge interactions. We compute the relevant operators of the Higgs sector (which arise at two and three loops). The potential contains logarithmic mass-squared terms which lead to three different low energy configurations. In the first the Higgs sector is the same as that of the usual Standard Model, with the negative Higgs mass-squared arising naturally from radiative corrections. The second has dominant logarithmic mass-squared terms for the Higgs, allowing the electroweak symmetry breaking minimum to be at zero vacuum energy or metastable. In the third configuration the effective potential has negligible quartic term, and yet electroweak symmetry is broken radiatively by a "running-Higgs-mass-squared". The phenomenology of the two new configurations is identical to that of the Standard Model, except for the Higgs self-couplings which are substantially different. [/flvcp3] We discuss recent progress towards an a-theorem governing renormalisation-group flow in four-dimensional quantum field theories, focussing on explicit perturbative results. We also discuss the evidence for an explicit all-orders a-function in supersymmetric theories. [/flvcp3] [/flvcp3]
dias May 20, 2014 at 11:10 Compositeness and Lattice Strong Dynamics by Pavlos M. Vranas (LLNL) MASS 2014 Talks Tuesday May 20, 2014 Neutrinos may be Majorana particles. If so, neutrino less double beta decay processes could be observed by the next generation of bb0nu experiments. I will briefly review the state of the art, then discuss one of the most promising ideas in the field, the use of Hight Pressure Gas Xenon TPC (HPGXe) with electroluminescence gain and optical readout. A 100 kg incarnation of such a device will start operations at the Canfranc Underground Lab in Spain in 2015. The technology can be extrapolated to 1 ton, and thus lead the exploration of the inverse hierarchy in Majorana landscape. [/flvcp3] With the discovery of a Higgs-like particle at the LHC we are leaving through a unique time in which unprecedented experimental means and expertise are matched by the results of decades of theoretical efforts to provide the most accurate description of collider data. The evidence for this new particle has given us some crucial hints to understand the nature of the electroweak interactions, and the accurate determination of its properties could provide further indirect evidence of new physics. In this talk I will review some of the theoretical developments that have played a crucial role in the discovery of a Higgs boson and will be essential in measuring its properties. [/flvcp3] Dark matter may be composite, made up of electroweak charged constituents, bound by a new strong force so that the composite particle is neutral and has diminishingly small interactions with ordinary matter. In addition, the breaking of electroweak symmetry and the emergence of the Higgs particle may be the result of spontaneous chiral symmetry breaking of a new underlying strongly interacting theory. These can be gauge theories with certain number of colors, flavors and fermion representations. In that case, their strong dynamics can be studied using Lattice Gauge Theory methods very much like Lattice QCD. Here I will present lattice simulation results from the Lattice Strong Dynamics (LSD) collaboration on possible composite dark matter models and the associated experimental exclusions, as well as results on conformality and compositeness for strongly interacting theories of electroweak symmetry breaking. [/flvcp3]
dias May 20, 2014 at 10:20 Higgs-boson phenomenology: from discovery to precision physics by Laura Reina (Florida) MASS 2014 Talks Tuesday May 20, 2014 Neutrinos may be Majorana particles. If so, neutrino less double beta decay processes could be observed by the next generation of bb0nu experiments. I will briefly review the state of the art, then discuss one of the most promising ideas in the field, the use of Hight Pressure Gas Xenon TPC (HPGXe) with electroluminescence gain and optical readout. A 100 kg incarnation of such a device will start operations at the Canfranc Underground Lab in Spain in 2015. The technology can be extrapolated to 1 ton, and thus lead the exploration of the inverse hierarchy in Majorana landscape. [/flvcp3] With the discovery of a Higgs-like particle at the LHC we are leaving through a unique time in which unprecedented experimental means and expertise are matched by the results of decades of theoretical efforts to provide the most accurate description of collider data. The evidence for this new particle has given us some crucial hints to understand the nature of the electroweak interactions, and the accurate determination of its properties could provide further indirect evidence of new physics. In this talk I will review some of the theoretical developments that have played a crucial role in the discovery of a Higgs boson and will be essential in measuring its properties. [/flvcp3] Dark matter may be composite, made up of electroweak charged constituents, bound by a new strong force so that the composite particle is neutral and has diminishingly small interactions with ordinary matter. In addition, the breaking of electroweak symmetry and the emergence of the Higgs particle may be the result of spontaneous chiral symmetry breaking of a new underlying strongly interacting theory. These can be gauge theories with certain number of colors, flavors and fermion representations. In that case, their strong dynamics can be studied using Lattice Gauge Theory methods very much like Lattice QCD. Here I will present lattice simulation results from the Lattice Strong Dynamics (LSD) collaboration on possible composite dark matter models and the associated experimental exclusions, as well as results on conformality and compositeness for strongly interacting theories of electroweak symmetry breaking. [/flvcp3]
dias May 20, 2014 at 9:00 The @next neutrinoless double beta decay experiment by Juan José Gómez-Cadenas (IFIC (CSIC & UVEG)) MASS 2014 Talks Tuesday May 20, 2014 Neutrinos may be Majorana particles. If so, neutrino less double beta decay processes could be observed by the next generation of bb0nu experiments. I will briefly review the state of the art, then discuss one of the most promising ideas in the field, the use of Hight Pressure Gas Xenon TPC (HPGXe) with electroluminescence gain and optical readout. A 100 kg incarnation of such a device will start operations at the Canfranc Underground Lab in Spain in 2015. The technology can be extrapolated to 1 ton, and thus lead the exploration of the inverse hierarchy in Majorana landscape. [/flvcp3] With the discovery of a Higgs-like particle at the LHC we are leaving through a unique time in which unprecedented experimental means and expertise are matched by the results of decades of theoretical efforts to provide the most accurate description of collider data. The evidence for this new particle has given us some crucial hints to understand the nature of the electroweak interactions, and the accurate determination of its properties could provide further indirect evidence of new physics. In this talk I will review some of the theoretical developments that have played a crucial role in the discovery of a Higgs boson and will be essential in measuring its properties. [/flvcp3] Dark matter may be composite, made up of electroweak charged constituents, bound by a new strong force so that the composite particle is neutral and has diminishingly small interactions with ordinary matter. In addition, the breaking of electroweak symmetry and the emergence of the Higgs particle may be the result of spontaneous chiral symmetry breaking of a new underlying strongly interacting theory. These can be gauge theories with certain number of colors, flavors and fermion representations. In that case, their strong dynamics can be studied using Lattice Gauge Theory methods very much like Lattice QCD. Here I will present lattice simulation results from the Lattice Strong Dynamics (LSD) collaboration on possible composite dark matter models and the associated experimental exclusions, as well as results on conformality and compositeness for strongly interacting theories of electroweak symmetry breaking. [/flvcp3]
dias May 19, 2014 at 16:30 Lattice Radial Quantization by George T. Fleming (Yale University) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias May 19, 2014 at 15:40 Non-perturbative propagators and running coupling in the conformal window of QCD by Reinhard Alkofer (Graz) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias May 19, 2014 at 14:20 From lowe energy neutrino data to mass models (and back) with leptogenesis. by Pasquale Di Bari (Southampton) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias May 19, 2014 at 11:10 Right-Handed Neutrinos as the Origin of the Electroweak Scale by Hooman Davoudiasl (BNL) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias May 19, 2014 at 10:20 Mass and Lattice QCD by Laurent Lellouch (CPT Marseille, CNRS & Aix-Marseille U) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias May 19, 2014 at 9:00 Present and Future of axion searches: the International AXion Observatory IAXO by Igor G. Irastorza (Zaragoza) MASS 2014 Talks Monday May 19, 2014 Axions are a natural consequence of the Peccei-Quinn mechanism, the most compelling solution to the strong-CP problem. Similar axion-like particles (ALPs) also appear in a number of possible extensions of the Standard Model, notably in string theories. Both axions and ALPs are very well motivated candidates for the Dark Matter, and are subject of increasing interest by experimentalists. I will present the different experimental strategies to detect these particles, and I will briefly review their current status and future prospects. Then I will focus on the International Axion Observatory (IAXO), the most ambitious project currently under consideration. IAXO will be a fourth generation axion helioscope. As its primary physics goal, IAXO will look for axions or ALPs originating in the Sun via the Primakoff conversion of the solar plasma photons. In terms of signal to background ratio, IAXO will be about 4-5 orders of magnitude more sensitive than CAST, the most sensitive axion helioscope to- date. IAXO has also potential to host additional detection setups. Most interestingly, the large magnetic volume of IAXO could be used to detect relic axion or ALPs potentially composing the galactic halo of Dark Matter. IAXO has the potential to serve as a multi-purpose facility for generic axion and ALP research in the next decade. [/flvcp3] While elementary particles get their mass from a Higgs-like mechanism, the origin of the mass of ordinary matter is non-perturbative, strong interaction dynamics. This has been unambiguously confirmed in the last few years, thanks to the tremendous progress undergone by ab-initio calculations in lattice quantum chromodynamics (QCD). After reviewing this progress, I will show how lattice QCD is allowing us to investigate many different aspects of mass. These applications range from providing the theory required to "measure" quark masses, to explaining important aspects of the stability of ordinary matter, through determining the coupling of possible WIMP dark matter, which could constitute 85% of the total matter in the universe, to the ordinary matter of WIMP detectors. [/flvcp3] The insular nature of the Standard Model may be explained if the Higgs potential is only sensitive to quantum corrections from masses associated with physical states. Starting from a scale-free electroweak sector, we show that heavy right-handed neutrinos can be the origin of mass for scalar dark matter, in a framework with two scalar doublets. In turn, below the mass of heavy neutrinos, the dark matter sector sets the scale of electroweak symmetry breaking. The successive transmission of mass scale from right-handed neutrinos occurs at the quantum level. This framework includes all the necessary ingredients to provide a viable dark matter candidate, realistic light neutrino masses, and the baryon asymmetry of the Universe via thermal leptogenesis. [/flvcp3] Do interacting UV fixed points exist, and if so, what can we do with them? The talk by Daniel Litim (Sussex) will be available later. I will discuss how imposing the successful leptogenesis bound one obtains interesting constraints on those high energy parameters characterising right-handed (RH) neutrino parameters in the see-saw mechanism. This provides a useful guidance among the many existing models especially when a condition of independence of the initial conditions is further added (strong thermal leptogenesis condition). In this case a particular (hierarchical) RH neutrino mass spectrum is singled out that, interestingly, is realised in SO(10)-inspired models. I will also discuss how the strong thermal leptogenesis condition by itself (i.e. model independently) favours values of the absolute neutrino mass scale that imply deviations from the hierarchical limit that might be experimentally detected in absolute neutrino mass scale experiments, especially in the case of normally ordered light neutrinos. In this way, leptogenesis acts as an important tool to connect low energy neutrino data to models. [/flvcp3] QCD with a relatively large number of fundamentally charged quark flavours in the chiral limit is considered. A self-consistent solution of the quark, gluon and ghost propagator Dyson-Schwinger equations in Landau gauge exhibits a phase transition. Above the critical number of fermion flavours the non-perturbative running coupling develops a plateau over a wide momentum range, and the propagators follow a power law behaviour for these momenta. Hereby, the critical number of quark flavours depends crucially on the non-perturbative tensor structures of the quark-gluon vertex. [/flvcp3] I present the current status of a program to formulate D-dimensional strongly-coupled relativistic quantum field theories on lattice discretizations of cylindrical manifolds whose cross-section is a (D-1)-dimensional sphere. Critical points in such theories should correspond to Conformal Field Theories (CFTs) if the full rotational symmetry of the sphere can be recovered in the continuum limit. If the formulation is successful, studying these CFTs should be numerically much less expensive that the equivalent calculations on a D-dimensional torus. [/flvcp3] Conformal bootstrap in 4D The talk by Oleg Antipin (INFN) will be available later.
dias September 16, 2013 New Physics from vector-like Technicolor: new opportunities for astrophysics and collider phenomenology by Roman Pasechnik (Lund University) I will discuss a new microscopic model for high-scale strongly-coupled dynamics in its simplest possible formulation based upon a single vector-like $SU(2)_{\rm W}$ T-quark doublet (with hypercharge $Y_Q=0$) confined under the minimal $SU(2)_{\rm TC}$ (in principle, any even) T-color group. Besides it naturally avoids stringent EW constraints at the fundamental level and may explain possible (small) deviations in Higgs couplings, it provides dynamical EW symmetry breaking via an effective Higgs mechanism. I will outline interesting theoretical and phenomenological opportunities related with lightest physical T-pion, T-sigma and T-baryon states in the considering scenario. In particular, I will illustrate why an odd QCD-like $SU(2n+1)_{TC}$ group of confinement has been excluded by XENON100 data on spin-independent Dark Matter cross section if the T-baryon number is conserved. Scalar T-baryon Dark Matter in the simplest even $SU(2)_{TC}$ group offers a prominent way out and distinctive collider signatures. Possible ways to construct the composite Higgs doublets in the vector-like Technicolor will be discussed. Finally, extra hybrid (bi-fundamental) color-T-color representations give rise to partial neutrino compositeness and effective see-saw mechanism for small neutrino mass generation in a natural way.
dias November 2, 2010 at 16:00 Black Holes in Elementary Physics by Gerard ‘t Hooft (Utrecht University) Abstract In Physics, black holes are known as extremely dense forms of matter, of which, from the outside, only the gravitational force can be detected. Astronomers observe such object ate various spots in the Universe. When in laboratories on earth elementary particles are made to collide with the strongest possible force, these collisions are by far not energetic enough to produce black holes. However, we can try to imagine collisions that are so energetic that black holes do form, and then ask ourselves what exactly might happen then. The question is important because it turns out that our theoretical understanding falls short at this point. The gravitational force is so special that all beautiful theories we have today about the particles and the forces between them cannot describe it. Do black holes obey the laws of quantum mechanics? Are black holes also subatomic particles and vice versa? If so, our theories must be revised. This can lead to fundamental new insights about very basic features in physics, and give us new tools to describe space, time, and matter. Professor Gerard 't Hooft Professor Gerard 't Hooft is a theoretical physicist at Utrecht University, the Netherlands. He shared the 1999 Nobel Prize in Physics with Martinus J. G. Veltman for elucidating the quantum structure of electroweak interactions. He was awarded the Lorentz Medal in 1986 and the Spinozapremie in 1995. Public Lecture Prof. 't Hooft gives a lecture on Black Holes in Elementary Physics. The lecture is intended for the general public. Everybody is welcome to attend. You do not need to register for the lecture, and entrance is free. Refreshments will be served before the lecture. More Information The Nobel Lecture is held together with the 3rd Odense Winter School on Geometry and Theoretical Physics - look at the home page of the winter school for travel information, accommodation, etc. Poster A PDF version of our poster can be found by following this link. Media
dias November 24, 2009 at 16:00 QCD and Event Generators by Torbjörn Sjöstrand (Lund) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 15:30 The proton-proton cross-section from low to LHC energies by Finn Ravndal (Oslo) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 14:30 LHC and Beyond by Michelangelo L. Mangano (CERN) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 14:00 String Theory and Particle Physics by Paolo Di Vecchia (NORDITA) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 11:30 Light-Front Holography - A New Approximation to QCD by Stanley J. Brodsky (SLAC/Stanford) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 11:00 The Structure of the Hadrons by Paul Hoyer (Helsinki) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 10:30 Introduction to CP3-Origins by Francesco Sannino (CP3-Origins) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias November 24, 2009 at 10:15 Danish National Research Foundation by Klaus Bock (DNRF) We are pleased to announce the formal Inauguration of the first danish Centre of Excellence for Particle Physics Phenomenology dedicated to the understanding of the origin of mass in the Universe, CP³-Origins hosted by the University of Southern Denmark (SDU). The Centre has been established by the Danish National Research Foundation (DNRF). Here you can download the poster and here the detailed program. Key note speakers Klaus Bock (DNRF) Stanley J. Brodsky (SLAC/Stanford) Paolo Di Vecchia (NORDITA) Paul Hoyer (Helsinki) Michelangelo L. Mangano (CERN) Henrik Pedersen (SDU) Finn Ravndal (Oslo) Francesco Sannino (CP³-Origins) Torbjörn Sjöstrand (Lund) [gallery link="file" columns="2"] The event will take place on Tuesday the 24th of November 2009 in Auditorium 100 of the University of Southern Denmark. The meeting starts at 10 AM. After the opening speeches by the Dean of the University of Southern Denmark, the Chair of the Danish National Research Foundation, and the presentation of the Centre by the Director, world renowned scientists will discuss the present and future of high energy physics. The scientific lectures will be short and at a beginning graduate studies level in physics. Besides marking the start of the new centre of excellence, the inauguration provides a unique opportunity to learn about our current understanding of the Universe and how we plan to get a step closer to unveiling some of its still unsolved mysteries such as the origin of bright and dark mass in the universe. The inauguration will be followed by an intense scientific program with a Workshop on the Origins of Mass problem on the 25th of November and a Winter School in Geometry and Theoretical Physics on the 26th and 27th of November. Media
dias October 26, 2009 Topology and the Universe by Berian James (DARK, Copenhagen) In recent decades, astronomical observations have led to a broad, if incomplete, consensus description of the large-scale Universe: its evolution is determined by a handful of substances ('usual' matter like atoms, stars and galaxies; a hidden, but gravitationally attractive dark matter; the poorly understood and unfortunately named dark energy) all of which are changing under the influence of physical laws. In the region of the Universe visible to astronomers, great cosmological structures are observed---dense clusters in which the majority of galaxies form; vast and apparently empty voids; and a tangle of filaments that has been coined 'the cosmic web'. In this talk, I explore the role that topology, the mathematics of shape, plays in defining our understanding of the Universe. After reviewing the relationship between geometry and dynamics that characterises the modern Big Bang theory, I discuss three topics of broad scope: i) the classification of cosmological structures as a means of understanding both the physics of the very early Universe and the evolution and formation of galaxies; ii) the impact of some modern mathematical results from differential geometry that have yet to be fully assimilated into physics; and iii) the theory and measurements of the global topology of the Universe---does it extend infinitely in all directions, or wrap-around on itself, and how can we tell? Due to technical reasons the first few minutes of the talk are unfortunately missing from the recording.