One-loop expressions for H^± → W^± Z and their implications at muon--TeV colliders

2025/09/28 by Tran, Dzung Tri, Pham, Quang Hoang-Minh, Ho, Khoa Ngo-Thanh +1
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.2509.23877

Abstract

One-loop contributions for decay process H^± → W^±Z within the Two-Higgs-Doublet Model are computed in the general R_ξ gauge, and its phenomenological applications at future muon--TeV colliders are studied in this paper. The analytic results are confirmed by several consistency tests, for example, the ξ-independence, the renormalization-scale stability and the ultraviolet finiteness of the one-loop amplitude. We first perform an updated parameter scan of the Type-X THDM in the phenomenological studies. The production of charged Higgs boson pairs at future muon--TeV colliders is investigated through the two processes μ⁺μ^- → H⁺H^- → W^±W^∓Zh and μ⁺μ^- → γγ→ H⁺H^- → W^±W^∓Zh. Both signal events and their significances are evaluated with taking into account the corresponding Standard Model backgrounds. We find that the signal significances can exceed 5σ at several benchmark points in the viable parameter space of the Type-X THDM.

Related

• Probing one-loop--induced decay channel H^± → W^±γ in the Two Higgs Doublet Models at muon-TeV colliders
• Novel Enhancement of Loop-Induced H^± W^∓ Z⁰ Vertex
• Production of charged Higgs bosons associated with CP-even Higgs bosons at future multi--TeV muon colliders
• One-loop off-shell decay H^* → ZZ at future colliders
• Charged Higgs bosons associated with neutral gauge bosons at future multi--TeV muon colliders