LHC searches for the CP-odd Higgs by the jet substructure analysis

TL;DR

This paper investigates the potential to discover the CP-odd Higgs boson at the LHC within the two-Higgs-doublet model using jet substructure techniques to identify signals in the hZ channel, especially when two Higgs bosons share a mass of 125 GeV.

Contribution

It introduces a novel search strategy for the CP-odd Higgs at the LHC utilizing jet substructure analysis in the hZ channel, focusing on scenarios with degenerate Higgs masses.

Findings

LHC can potentially detect CP-odd Higgs up to 1 TeV mass

Jet substructure effectively suppresses Standard Model background

The hZ channel is promising for CP-odd Higgs discovery in specific scenarios

Abstract

The LHC searches for the CP-odd Higgs boson is studied (with masses from 300 GeV to 1 TeV) in the context of the general two-Higgs-doublet model. With the discovery of the 125 GeV Higgs boson at the LHC, we highlight one promising discovery channel of the hZ. This channel can become significant after the global signal fitting to the 125 GeV Higgs boson in the general two-Higgs-doublet model. It is particularly important in the scenario where two CP-even Higgs bosons in the two-Higgs-doublet model have the common mass of 125 GeV. Since the final states involve a Standard-Model-like Higgs boson, we apply the jet substructure analysis of the fat Higgs jet in order to eliminate the Standard Model background sufficiently. After performing the kinematic cuts, we present the LHC search sensitivities for the CP-odd Higgs boson with mass up to 1 TeV via this channel.