Parameter dependence and analysis of the 2HDM neutral Higgs boson pair production and decay at future lepton colliders

Abstract

In this work, we present a study of the neutral Higgs bosons in the two Higgs doublet model (2HDM) in terms of their production processes and decay channels as a function of the model parameters. The analysis is performed for all four types of the 2HDM and the most promising processes and decay channels are identified for each type of the model. Several Higgs boson mass scenarios below and above the threshold of decay to gauge boson pair are introduced and the corresponding categories of final states are analyzed. The event analysis including collider beam spectrum and detector simulation shows that future lepton colliders have the potential to explore regions in the 2HDM parameter space, which have not yet been excluded by LHC, in a few weeks of operation. Final results are presented in terms of the signal distributions on top of the background and 95% CL exclusion and 5$\sigma$ contours based on center of mass energy of $\sqrt{s}$ = 500 GeV at the Compact Linear Collider (CLIC) or International Linear Collider (ILC).

12 pages, 20 figures, added event analysis and LHC SM Higgs measurement constraints

References in corpus (8)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Search for a CP-odd Higgs boson decaying to $Zh$ in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for a heavy pseudoscalar boson decaying to a Z and a Higgs boson at $\sqrt{s}=$ 13 TeV
• Search for a heavy Higgs boson decaying into a $Z$ boson and another heavy Higgs boson in the $\ell \ell bb$ and $\ell \ell WW$ final states in $pp$ collisions at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons
• Charged Higgs Observability Through Associated Production With W at a Muon Collider
• Kinematic corrections and reconstruction methods for neutral Higgs boson decay to $b\bar{b}$ in 2HDM type-I at future lepton colliders

Cited by in corpus (2)

• Charged Higgs decay to $W^{\pm }H$ at a high energy lepton collider
• Heavy neutral 2HDM Higgs Boson Pair Production at CLIC Energies