Technicolor with Scalar Doublet After the Discovery of Higgs Boson

Abstract

The SM-like Higgs boson with mass of 125 GeV discovered at the LHC is subject to a natural interpretation of electroweak symmetry breaking. As a successful theory in offering this naturalness, technicolor with a scalar doublet and two both $SU(3)_c$ and $SU(N_{TC})$ colored scalars, which is considered as a low-energy effective theory, is proposed after the discovery of SM-like Higgs boson. At present status, the model can be consistent with both the direct and indirect experimental limits. In particular, the consistency with precision electroweak measurements is realized by the colored scalars, which give rise to a large {\it negative} contribution to $S$ parameter. It is also promising to detect techni-pions and these colored scalars at the LHC.