2025/12/03 by Pham, Quang Hoang-Minh, Kuoksan Ho, Ho, Khoa Ngo-Thanh +2
Computer Science · Physics and Astronomy · #Computational Physics and Python Applications #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle Detector Development and Performance #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2512.03810
openalex publication_date 2025/12/03 · openalex created_date 2025/12/05 · openalex updated_date 2026/07/28
We report the first results for charged Higgs boson production associated with CP-even Higgses at future multi--TeV muon colliders within the scenario of the Type-Y Two-Higgs-Doublet Model (THDM). The valid parameter regions in the Type-Y THDM are first updated, and based on the allowed parameter space, all two-body decay channels of the charged Higgs boson are then computed with the help of \tt H-COUP. Both production processes μ- μ+ → H^± H^∓ h, H^± H^∓ H → tt bb h, tt bbH are scanned over the constrained parameter space of the considered model. The production cross sections can reach ∼ 0.5 fb in several regions of the parameter space. The results provide an opportunity to probe charged Higgs bosons produced in association with the heavy CP-even Higgses at the high integrated luminosities proposed for future multi--TeV muon colliders. Furthermore, we evaluate the signal significances for μ- μ+ → H^± H^∓ h → tt bb h → tt bb bb with respect to the Standard Model backgrounds. We also estimate the significances by including the top quark decay into leptons and bottom quarks and considering b-tagging. Thanks to the high integrated luminosities anticipated at future multi--TeV muon colliders,we find that the signal significances can exceed ∼ 3σ at several benchmark points selected in the viable parameter space of the Type-Y THDM.