Low-mass fermiophobic charged Higgs phenomenology in two-Higgs-doublet models

TL;DR

This paper explores the phenomenology of a light fermiophobic charged Higgs in two-Higgs-doublet models, highlighting unique production and decay channels that could guide future LHC searches.

Contribution

It introduces the concept of a fermiophobic charged Higgs in 2HDMs and analyzes its production and decay channels, which are not constrained by current experimental bounds.

Findings

Evades existing experimental bounds due to fermiophobic nature

Identifies new production channels involving W or neutral scalars

Suggests promising signatures for LHC searches

Abstract

After the recent discovery of a Higgs-like boson, the possibility of an enlarged scalar sector arises as a natural question. Experimental searches for charged scalars have been already performed with negative results. We analyze the phenomenology associated with a fermiophobic charged Higgs (it does not couple to fermions at tree level), in two-Higgs-doublet models. All present experimental bounds are evaded trivially in this case, and one needs to consider other decay and production channels. We study the associated production of a charged Higgs with either a $W$ or a neutral scalar boson, and the relevant decays for a light fermiophobic charged Higgs. The interesting features of this scenario should result encouraging for the LHC collaborations to perform searches for such a particle.