Leptophilic neutral Higgs bosons in two Higgs doublet model at a linear collider

Abstract

Abstract This paper addresses the question of the observability of neutral Higgs bosons through the leptonic decay in a two Higgs doublet model (2HDM). Both scalar and pseudo-scalar Higgs bosons (H, A) are considered. The model is set to type IV to enhance the leptonic decay. In such a scenario, a signal production process like $$e^+e^- \rightarrow A^0H^0 \rightarrow \tau \tau \mu \mu $$ e + e - → A 0 H 0 → τ τ μ μ or $$\mu \mu \tau \tau $$ μ μ τ τ would provide a clear signal on top of the background in a di-muon invariant mass distribution far from the Z boson pole mass. The analysis is based on a $$\tau $$ τ -id algorithm which preselects events if they have two $$\tau $$ τ jets by requiring a hadronic $$\tau $$ τ decay. Several benchmark points are defined for the search, requiring a linear collider operating at $$\sqrt{s} = 0.5$$ s = 0.5 and 1 TeV. It is shown that the signal can be observed on top of the background in all benchmark points at an integrated luminosity of 1000 $$\mathrm{fb}^{-1}$$ fb - 1 .

Keywords

• Higgs Boson
• Higgs Boson Mass
• Benchmark Point
• Linear Collider
• Leptonic Decay