Charged Higgs observability in the single top production channel at LHC

TL;DR

This paper investigates the potential to observe charged Higgs bosons in single top production at the LHC, focusing on a specific decay channel with b jets, tau leptons, and missing energy, within the MSSM framework.

Contribution

It demonstrates the observability of charged Higgs signals in the MSSM parameter space at the LHC considering realistic backgrounds and different integrated luminosities.

Findings

Charged Higgs can be observed or excluded in a wide parameter space.

Observability improves with higher integrated luminosity.

Specific phase space regions are identified for potential discovery.

Abstract

Single top quark production through weak interactions is an important source of charged Higgs in the Minimal Super Symmetric Standard Model. In the s-channel single top production ,charged Higgs having largest cross-section may appear as a propagator in the form of heavy resonance state decaying to a pair of top and bottom quark. In this paper the channel under consideration is $pp \rightarrow H^{\pm}\rightarrow tb \rightarrow b\bar{b}W^{\pm} \rightarrow b\bar{b}\tau^{\pm} \nu_{\tau}$, where top quark exclusively decays into a pair of b quark and W boson while W boson subsequently decays to $\tau$ jet and neutrino. So the final state is characterized by the presence of two b jets, hadronic $\tau$ decay and missing transverse energy.It has been demonstrated that the charged Higgs signal observability is possible within the available MSSM parameter space (tan$\beta$, $m_{H^{\pm}})$ respecting all experimental and theoretical constraints due to presence of QCD multijet and electroweak background events at LHC. In order to show the observability potential of charged Higgs, the charged Higgs signal are well observed or excluded in a wide range of phase space particular ($\beta > 35$ at 500 $fb^{-1}$ , $\beta > 25$ at 1000 $fb^{-1}$ , $\beta > 15$ at 3000 $fb^{-1}$ ) at $\sqrt{s}=$14 TeV.