Charged Higgs Search in 2HDM

TL;DR

This paper provides a comprehensive analysis of collider search limits for charged Higgs bosons in various 2HDM types, incorporating multiple search channels and decay modes to extend the understanding of their parameter space.

Contribution

It introduces combined constraints from flavor physics, LEP, and LHC searches, including exotic decay channels, to improve bounds on charged Higgses in 2HDM models.

Findings

Exotic decay channels $H^ ightarrow A W^ ightarrow$ extend search reach.

Complementarity of decay channels enhances detection prospects.

Combined searches improve bounds on charged Higgs mass and $ an eta$.

Abstract

In this paper, we present a comprehensive study of the collider search limits on the charged Higgses in the four types of Two Higgs Double Models (2HDM). In addition to constraints from flavor physics measurements, we include both the LEP charged Higgs search channels, as well as the LHC search results on the light and heavy charged Higgses. We consider both the conventional charged Higgs search channels of $H^\pm \rightarrow \tau\nu, cs, cb, tb$, and the latest search results on the exotic decay channels $H^\pm \rightarrow A W^\pm / H W^\pm$. We find that $H^\pm \rightarrow A W^\pm / H W^\pm$ are complementary to the conventional fermionic channels for $m_{H^\pm} < m_t$. For heavy $H^\pm$, $H^\pm \rightarrow A W^\pm / H W^\pm$ extend the reach of $\tan \beta$ beyond that of $H^\pm \to tb$ in the Type-L 2HDM. We also present the combined reach of all the neutral and charged Higgs searches.