New Physics from vector-like Technicolor: new opportunities for astrophysics and collider phenomenology

Who: Roman Pasechnik (Lund University)
When: Monday, September 16, 2013 at 14:15
Where: U49

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.

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