Observability of 2HDM neutral Higgs bosons with different masses at future $e^{+}{e}^{-}$ linear colliders

Abstract

Assuming two Higgs doublet model (2HDM) at SM-like scenario as the theoretical framework, this study addresses the question of observability of heavy neutral CP-even and CP-odd Higgs bosons $H$ and $A$ at a linear collider operating at $\sqrt{s}=1$ TeV. The signal production channel is $e^{-}{e}^{+}\to AH\to ZHH$ with subsequent leptonic decay of the $Z$ boson and Higgs bosons decays into $b$ quark pairs. Therefore, to be specific, type-I 2HDM is used to allow dominant Higgs boson decay to b-quark pairs below the top quark pair production threshold. Two benchmark points with mass ranges $150\le m_H\le 200$ and $250\le m_A\le 300$ are simulated. The relevant energy and momentum smearing is applied and appropriate selection cuts are imposed to enrich signal events. Results indicate that both Higgs bosons are observable with signals exceeding $5\sigma$ significance with possibility of mass measurement at the integrated luminosity of 500 $f{b}^{-1}$.

17 pages, 7 figures, 11 tables

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Cited by in corpus (4)

• Charged Higgs decay to $W^{\pm }H$ at a high energy lepton collider
• Kinematic corrections and reconstruction methods for neutral Higgs boson decay to $b\bar{b}$ in 2HDM type-I at future lepton colliders
• Heavy neutral 2HDM Higgs Boson Pair Production at CLIC Energies
• Observability of 2HDM Neutral Higgs Bosons in fully hadronic decay at future linear collider