Charged Higgs observability through associated production with W ± at a muon collider

M. Hashemi

doi:10.1140/epjc/s10052-012-2207-7

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2024 Impact factor 4.8

Particles and Fields

Eur. Phys. J. C (2012) 72: 2207
https://doi.org/10.1140/epjc/s10052-012-2207-7

Regular Article - Theoretical Physics

Charged Higgs observability through associated production with W ^± at a muon collider

M. Hashemi^*

Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz, 71454, Iran

^* e-mail: hashemi_mj@shirazu.ac.ir

Received: 12 June 2012
Revised: 25 September 2012
Published online: 1 November 2012

Abstract

The observability of a charged Higgs boson produced in association with a W boson at future muon colliders is studied. The analysis is performed within the MSSM framework. The charged Higgs is assumed to decay to $t\bar{b}$ and a fully hadronic final state is analyzed, i.e., $\mu^{+}\mu^{-} \rightarrow H^{\pm}W^{\mp} \rightarrow t\bar{b}W^{-} \rightarrow W^{+}b\bar{b}W^{-} \rightarrow jjjjb\bar{b}$ . The main background is $t\bar{t}$ production in a fully hadronic final state which is an irreducible background with very similar kinematic features. It is shown that although the discovery potential is almost the same for a charged Higgs mass in the range $200~\textnormal{GeV} < m_{H^{\pm}} < 400~\textnormal{GeV}$ , the signal significance is about 1σ for tanβ=50 at integrated luminosity of 50 fb⁻¹. The signal rate is well above that at e ⁺ e ⁻ linear colliders with the same center of mass energy, and enough data (O(1 ab⁻¹)) will provide the same discovery potential for all heavy charged Higgs masses up to $m_{H^{\pm}} \sim 400~\textnormal{GeV}$ ; however, the muon collider cannot add anything to the LHC findings.