Charged Higgs decay to $W^{\pm}H$ at a high energy lepton collider

TL;DR

This paper proposes a search strategy for heavy charged Higgs bosons at the future CLIC collider, demonstrating the potential to observe signals in the 250-650 GeV mass range through specific decay channels.

Contribution

It introduces a novel detection approach for charged Higgs bosons in the 2HDM at a high-energy lepton collider, focusing on the $H^{ o} W^{ o} H$ decay mode at 1400 GeV.

Findings

Charged Higgs masses between 250 and 650 GeV can be detected.

Signal can be distinguished with 5σ significance in the fully hadronic final state.

Detection prospects depend on $ aneta$ values.

Abstract

In this work, we present a search strategy for heavy charged Higgs boson at Compact Linear Collider (CLIC) as a future $e^+e^-$ collider. The signal is charged Higgs boson pair production in two Higgs doublet model (2HDM) followed by $H^{\pm}\to W^{\pm}H$ and $H\to b\bar{b}$. Here, $H$ denotes the heavy CP-even neutral Higgs boson of the model. The collider center of mass energy is chosen to be $\sqrt{s}=1400$ GeV as the second stage of CLIC operation. In this case, $m_{H^+}<\sqrt{s}/2$ can be explored due to the pair production. It is shown that the signal of charged Higgs in the mass range 250 GeV $<m_{H^+}<$ 650 GeV in fully hadronic final state, containing four $b$-jets from neutral Higgs and four jets from $W$ bosons, can well be observed on top of the standard model background. Finally 5$\sigma$ contours are presented in ($m_{H^{\pm}}$, $m_H$) space for different $\tan\beta$ values.