Neutral scalar pair productions through $W$-boson fusion at multi--TeV muon colliders
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866909993477865472 |
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| author | Phan, Khiem Hong Pham, Quang Hoang-Minh |
| author_facet | Phan, Khiem Hong Pham, Quang Hoang-Minh |
| contents | Full one-loop electroweak radiative corrections to $μ^- μ^+ \to W^\pm W^\mp \to hh$ in the Standard Model are computed for the first time in this work. We then evaluate neutral scalar pair production through vector boson fusion at multi--TeV muon colliders within Two-Higgs-Doublet Model (THDM). In the phenomenological analysis, the enhancement factor, defined as the ratio of the cross sections for SM-like Higgs pair production in the THDM with respect to the corresponding ones in the SM, is examined over the viable regions of the parameter space in the Type-X and Type-Y THDMs. Our findings show that this ratio can reach a factor of $3$ in several regions within the valid parameter space of the Type-X THDM, whereas it ranges from $0.91$ to $0.96$ over the entire parameter space of the Type-Y THDM. Finally, we scan the cross sections for double CP-odd Higgs production over the updated parameter space of the Type-X and Type-Y THDMs. In the Type-Y case at $\sqrt{s} = 10$~TeV with an integrated luminosity of $\mathcal{L} = 10000~\text{fb}^{-1}$, CP-odd Higgs pair production in the $t\bar{t}b\bar{b}$ final state, with subsequent top-quark decays into leptons and bottom quarks taken into account, can be tested with a statistical significance exceeding the $2σ$ level at several viable parameter points. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2601_12211 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Neutral scalar pair productions through $W$-boson fusion at multi--TeV muon colliders Phan, Khiem Hong Pham, Quang Hoang-Minh High Energy Physics - Phenomenology Full one-loop electroweak radiative corrections to $μ^- μ^+ \to W^\pm W^\mp \to hh$ in the Standard Model are computed for the first time in this work. We then evaluate neutral scalar pair production through vector boson fusion at multi--TeV muon colliders within Two-Higgs-Doublet Model (THDM). In the phenomenological analysis, the enhancement factor, defined as the ratio of the cross sections for SM-like Higgs pair production in the THDM with respect to the corresponding ones in the SM, is examined over the viable regions of the parameter space in the Type-X and Type-Y THDMs. Our findings show that this ratio can reach a factor of $3$ in several regions within the valid parameter space of the Type-X THDM, whereas it ranges from $0.91$ to $0.96$ over the entire parameter space of the Type-Y THDM. Finally, we scan the cross sections for double CP-odd Higgs production over the updated parameter space of the Type-X and Type-Y THDMs. In the Type-Y case at $\sqrt{s} = 10$~TeV with an integrated luminosity of $\mathcal{L} = 10000~\text{fb}^{-1}$, CP-odd Higgs pair production in the $t\bar{t}b\bar{b}$ final state, with subsequent top-quark decays into leptons and bottom quarks taken into account, can be tested with a statistical significance exceeding the $2σ$ level at several viable parameter points. |
| title | Neutral scalar pair productions through $W$-boson fusion at multi--TeV muon colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2601.12211 |