Probing 3-3-1 Models in Diphoton Higgs Boson Decay

TL;DR

This paper explores how 3-3-1 models could enhance the Higgs boson diphoton decay signal at the LHC, potentially explaining observed excesses and constraining new physics scenarios.

Contribution

It provides a detailed analysis of Higgs production and decay in 3-3-1 models, highlighting the impact of new charged vector bosons on diphoton signals.

Findings

Enhanced diphoton decay signal in 3-3-1 models compared to Standard Model.

Potential explanation for the small excess observed at the LHC for Higgs mass ≤ 145 GeV.

Constraints on 3-3-1 models if the excess is a statistical fluctuation.

Abstract

We investigate the Higgs boson production through gluon fusion and its decay into two photons at the LHC in the context of the minimal 3-3-1 model and its alternative version with exotic leptons. The diphoton Higgs decay channel presents an enhanced signal in this model compared to the Standard Model due to the presence of an extra singly charged vector boson and a doubly charged one. Prospects for the Higgs boson detection at 7 TeV center-of-mass energy with up to 10 fb$^{-1}$ are presented. Our results suggest that a Higgs boson from these 3-3-1 models can potentially explain the small excess for $m_H\leq 145$ GeV observed at the LHC. Otherwise, if this excess reveals to be only a statistical fluctuation of the Standard Model backgrounds severe constraints can be put on these models.