Detecting heavy charged Higgs bosons at the LHC with triple b-tagging

TL;DR

This paper explores detecting heavy charged Higgs bosons at the LHC by using triple b-tagging and reconstructing top and Higgs masses to distinguish signal from background in specific parameter regions.

Contribution

It introduces a novel method combining triple b-tagging with mass reconstruction to identify charged Higgs bosons in LHC data, focusing on particular parameter space regions.

Findings

Effective signal identification over specific parameter regions.

Mass reconstruction techniques improve signal-to-background separation.

Potential for experimental detection of heavy charged Higgs bosons.

Abstract

We investigate the charged Higgs boson signal at the LHC using its dominant production and decay modes with triple b-tagging, i.e. $tH^- \to t\bar tb \to b\bar bb W^+ W^-$, followed by leptonic decay of one W and hadronic decay of the other. We consider the continuum background from the associated production of $t\bar t$ with a b- or a light quark or gluon jet, which can be mis-tagged as b-jet. We reconstruct the top quark masses to identify the 3rd b-jet accompanying the $t\bar t$ pair, and use its p_T distribution to distinguish the signal from the background. Combining this with the reconstruction of the $H^\pm$ mass gives a viable signature over two interesting regions of the parameter space - i.e. $\tan\beta \sim 1$ and $\sim m_t/m_b$.