Exploring a heavy charged Higgs using jet substructure in a fully hadronic channel

TL;DR

This paper proposes a novel search strategy for heavy charged Higgs bosons in fully hadronic final states at the 14 TeV LHC, utilizing jet substructure techniques and multivariate analysis to improve detection sensitivity.

Contribution

It introduces a new approach combining jet substructure and multivariate analysis for heavy charged Higgs detection in a fully hadronic channel within the 2HDM-II framework.

Findings

Enhanced signal-to-background discrimination using jet substructure.

Potential to detect charged Higgs at high masses with sufficient luminosity.

Detailed sensitivity estimates for different integrated luminosities.

Abstract

In the framework of the type-II Two Higgs Doublet Model (2HDM-II) a charged Higgs search strategy is presented for the dominant production mode $gb \rightarrow tH^\pm$ at the 14 TeV LHC. We consider the decay process which includes $t \rightarrow bW^\pm$ and $H^\pm \rightarrow AW^\pm$, and a fully hadronic final state consisting of $bb\bar{b}+\mbox{jets}+X$. Dictated by the $b \rightarrow s\gamma$ constraints which render $M_{H^\pm} > 480$ GeV we study two scenarios in which the charged Higgs mass is 750 GeV and the pseudoscalar Higgs mass is 200 GeV and 500 GeV. In this mass scheme highly boosted final state objects are expected and handled with jet substructure techniques which also acts to suppress the standard model background. A detailed detector analysis is performed, followed by a multivariate analysis involving many kinematic variables to optimize signal to background significance. Finally the LHC search sensitivities for the two scenarios are presented for various integrated luminosities.