Eur. Phys. J. Plus (2022) 137: 419
https://doi.org/10.1140/epjp/s13360-022-02654-2

Regular Article

Observability of 2HDM neutral Higgs bosons in fully hadronic decay at future linear collider

¹ Riphah International University, Islamabad, Pakistan
² National University of Technology, Islamabad, Pakistan

Received: 10 February 2022
Accepted: 25 March 2022
Published online: 4 April 2022

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 center of mass energy (c.m.s.), a possible scenario in future lepton collider. The associated production of A and H in $e+e-$ collisions are investigated in a fully hadronic final state in two different channels. The first one is $\mathrm{AH}\to \mathrm{ZHH}\to j\overline{j}b\overline{b}b\overline{b}$, while the other one is $\mathrm{AH}\to b\overline{b}b\overline{b}$. 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 the 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 the current analysis that a fully hadronic channel is promising for search and measurement of the neutral Higgs bosons in 2HDM.