The Technicolor Higgs in the Light of LHC Data

TL;DR

This paper explores the possibility that the 125 GeV Higgs boson is a Technicolor isosinglet scalar, showing it can closely mimic Standard Model Higgs couplings and fit LHC data within certain parameter ranges.

Contribution

It provides a generic parameterization of TC Higgs interactions and demonstrates compatibility with LHC data, supporting the Technicolor Higgs hypothesis.

Findings

Couplings to weak bosons are close to SM values.

Couplings to photons and gluons are model-dependent but often similar to SM.

The fit to LHC data supports the TC Higgs scenario within certain parameters.

Abstract

We consider scenarios in which the 125 GeV resonance observed at the Large Hadron Collider is a Technicolor (TC) isosinglet scalar, the TC Higgs. By comparison with quantum chromodynamics, we argue that the couplings of the TC Higgs to the massive weak bosons are very close to the Standard Model (SM) values. The couplings to photons and gluons are model-dependent, but close to the SM values in several TC theories. The couplings of the TC Higgs to SM fermions are due to interactions beyond TC, such as Extended Technicolor: if such interactions successfully generate mass for the SM fermions, we argue that the couplings of the latter to the TC Higgs are also SM-like. We suggest a generic parameterization of the TC Higgs interactions with SM particles that accommodates a large class of TC models, and we perform a fit of these parameters to the Higgs LHC data. The fit reveals regions of parameter space where the form factors are of order unity and consistent with data at the 95% CL, in agreement with expectations in TC theories. This indicates that the discovered Higgs boson is consistent with the TC Higgs hypothesis for several TC theories.