LHC searches for heavy neutral Higgs bosons with a top jet substructure analysis

TL;DR

This paper investigates the potential to detect heavy neutral Higgs bosons at the LHC through top jet substructure analysis, focusing on decay modes into top quark pairs within the two-Higgs-doublet model.

Contribution

It introduces a novel search strategy using top jet substructure techniques for heavy Higgs bosons in the two-Higgs-doublet model at the LHC.

Findings

Enhanced sensitivity for heavy Higgs detection at high-luminosity LHC

Effective use of HEPTopTagger and multivariate analysis methods

Potential to probe dominant decay modes in the alignment limit

Abstract

We study the LHC searches for the heavy $CP$-odd Higgs boson $A$ and $CP$-even Higgs boson $H$ in the context of general two-Higgs-doublet model. Specifically, we consider the decay mode of $A/H\to t \bar t $ through the $b \bar b$ or $t \bar t $ associated production channels. In the so-called "alignment limit" of the two-Higgs-doublet model, this decay mode can be the most dominant one. By employing the HEPTopTagger and the multi-variable-analysis method, we present the search sensitivities for both $CP$-odd Higgs boson $A$ and $CP$-even Higgs boson $H$ via these channels at the high-luminosity LHC runs.