Observability of 2HDM Neutral Higgs Bosons in fully hadronic decay at future linear collider

TL;DR

This paper investigates the potential to observe neutral Higgs bosons in the two-Higgs-doublet model at a future linear collider, focusing on fully hadronic decay channels and analyzing signal significance across parameter space.

Contribution

It provides a detailed analysis of the observability of neutral Higgs bosons in 2HDM at a future collider using fully hadronic final states, highlighting promising detection channels.

Findings

Neutral Higgs bosons are observable within certain parameter ranges.

Fully hadronic channels show high potential for Higgs detection.

Signal significance exceeds 5σ in analyzed scenarios.

Abstract

The study aims to investigate the observability of pseudoscalar Higgs boson $A$ and neutral heavy CP even Higgs boson $H$, at different benchmark points, in the framework of type-I 2HDM. The study is done for $e^{-}e^{+}$ collisions at $\sqrt{s}$ = 1000 GeV centre of mass energy (c.o.m.) a possible scenario in future lepton collider. The associated production of $A$ and $H$ in $e+ e-$ collisions are investigated in fully hadronic final state in two different channels. The first one is $AH \to ZHH \to j\bar{j} b \bar{b}b\bar{b}$ while the other one is $AH \to b \bar{b}b\bar{b}$. The observability of neutral heavy Higgs and pseudoscalar Higgs signal is possible within the parameter space $ (\tan \beta, m_{A}) $ which satisfies all experimental and theoretical constraints. The CP odd and CP even Higgs bosons in all scenarios are observable when signal exceeds $ 5\sigma $, which is the final extracted value of signal significance. The signal significance is calculated at different integrated luminosities. It is concluded from current analysis that fully hadronic channel is promising for search and measurement of the neutral Higgs Bosons in 2HDM.