Discovery of Charged Higgs through {\gamma}{\gamma} final states

TL;DR

This paper explores the potential to discover charged Higgs bosons at the LHC via their decay into gamma gamma final states, especially in extended Higgs sectors like the NMSSM, highlighting new decay channels and production scenarios.

Contribution

It introduces scenarios where charged Higgs bosons decay into light scalars or pseudoscalars that produce gamma gamma signals, expanding search strategies beyond traditional decay modes.

Findings

Charged Higgs can be produced in top decays with significant cross-section.

Gamma gamma final states provide a promising detection channel.

Signal exceeds Standard Model background at 13 TeV with 100 fb$^{-1}$].

Abstract

Extending the Higgs sector by an additional $SU(2)_L$ doublet Higgs boson implies the existence of a charged Higgs boson $H^+$. The LHC experiments search for such particle focusing on it decays into leptonic and quark decay final states, namely $\tau \nu$,$cs$ and $tb$. However, if the Higgs sector if further extended, e.g. by a gauge singlet as in the NMSSM, the charged Higgs boson can also decay into a light scalar or pseudoscalar Higgs boson which itself decays further into a two photon final state. We present here scenarios where $H^+$ is produced in top-quark decays with a sizable cross-section such the corresponding signal is well above the Standard Model background at the 13 TeV run of Large Hadron Collider (LHC) with an integrated luminosity 100 fb$^{-1}$.