Two Composite Higgs Doublets: Is it the Low Energy Limit of a Natural Strong Electroweak Symmetry Breaking Sector ?

TL;DR

This paper proposes a model with two composite Higgs bosons arising from different sectors, exploring their phenomenology and production mechanisms at the LHC, as an alternative to the Standard Model Higgs.

Contribution

It introduces a two-Higgs composite model combining Minimal Walking Technicolor and Topcolor sectors, analyzing their distinct phenomenological signatures.

Findings

Light composite Higgs production is dominated by associated production and WW fusion.

Gluon-gluon fusion is suppressed for the composite Higgs.

The model provides distinctive LHC signatures different from the Standard Model.

Abstract

In this paper, we construct an effective model that describes the electroweak symmetry breaking sector by means of composite Higgs-like scalars, following the ideas of Minimal Walking Technicolor (MWT). We argue that, because of the general failure of Extended Technicolor (ETC) to explain the mass of the top quark, it is necessary to introduce two composite Higgs bosons: one of them originated by a MWT-ETC sector and the other one produced by a Topcolor sector. We focus on the phenomenological differences between the light composite Higgs present in our model and the fundamental Higgs boson predicted by the Standard Model and their production at the LHC. We show that in this scheme the main production channel of the lighter Higgs boson are the associated production with a gauge boson and $WW$ fusion but not the gluon-gluon fusion channel which is substantially suppressed.