Composite Higgs to two Photons and Gluons

TL;DR

This paper presents a framework to estimate the couplings of a composite Higgs to two photons and gluons within Technicolor models, highlighting how these processes can distinguish it from the Standard Model and constraining techniquark properties.

Contribution

It introduces a simple predictive framework for composite Higgs couplings to photons and gluons, aiding experimental differentiation from the Standard Model Higgs.

Findings

Corrections to decay rates are typically of order one.

Two-photon decay process can distinguish a light composite Higgs from the Standard Model.

Tevatron results constrain techniquarks to be uncolored or imply a heavier Higgs.

Abstract

We introduce a simple framework to estimate the composite Higgs boson coupling to two-photon in Technicolor extensions of the standard model. The same framework allows us to predict the composite Higgs to two-gluon process. We compare the decay rates with the standard model ones and show that the corrections are typically of order one. We suggest, therefore, that the two-photon decay process can be efficiently used to disentangle a light composite Higgs from the standard model one. We also show that the Tevatron results for the gluon-gluon fusion production of the Higgs either exclude the techniquarks to carry color charges to the 95% confidence level, if the composite Higgs is light, or that the latter must be heavier than around 200 GeV.