Orthogonal Technicolor with Isotriplet Dark Matter on the Lattice

Preprint number: CP3-Origins-2012-30 and DIAS-2012-31
Authors: Ari Hietanen (CP3-Origins & DIAS), Claudio Pica (CP3-Origins & DIAS), Francesco Sannino (CP3-Origins & DIAS), and Ulrik Ishøj Søndergaard (CP3-Origins & DIAS)
External link: arXiv.org

We study the gauge dynamics of an SO(4)-gauge theory with two Dirac Wilson fermions transforming according to the vector representation of the gauge group. We determine the lattice phase diagram by locating the strong coupling bulk phase transition line and the zero PCAC mass line. We present results for the spectrum of the theory. In particular we measure the pseudoscalar, vector and axial meson masses. The data are consistent with a chiral symmetry breaking scenario rather than a conformal one. When used to break the electroweak symmetry dynamically the model leads to a natural dark matter candidate.