Observability of s-channel Heavy Charged Higgs at LHC Using Top Tagging Technique

TL;DR

This paper investigates the potential to detect heavy charged Higgs bosons at the LHC using top tagging techniques, demonstrating the feasibility of mass reconstruction and discovery prospects in the 500 GeV to 1 TeV range.

Contribution

It introduces a detailed hadron level analysis employing top tagging to identify heavy charged Higgs signals at the LHC, including mass reconstruction and significance estimation.

Findings

Charged Higgs mass can be reconstructed between 500 GeV and 1 TeV.

Signal significance varies with tanbeta, enabling potential discovery.

Exclusion limits and discovery contours are established for different masses.

Abstract

In this paper, the question of observability of a heavy charged Higgs in the mass range 400 GeV < mH < 1000 GeV, is addressed. The production process is set to pp -> H+ -> tb at 14 TeV LHC. The analysis benefits from top tagging technique which is based on finding a fat jet as a result of the boosted top quark decay in signal events. A detailed hadron level analysis is performed and selection efficiencies are presented with different charged Higgs mass hypotheses. Finally running toy experiments and using pseudo-data, a fit over signal plus background distributions is performed to assess possibility of reconstructing the charged Higgs peak and its invariant mass measurement. It is shown that the charged Higgs mass can well be reconstructed in the mass range 500 GeV to 1 TeV, with a signal significance which depends on tanbeta. Eventually 5sigma discovery and 95% C.L. exclusion contours are also provided.