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| Main Authors: | , , , |
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| Format: | Preprint |
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2025
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| Online Access: | https://arxiv.org/abs/2509.08417 |
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| _version_ | 1866916944654893056 |
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| author | Tran, Dzung Tri Pham, Quang Hoang-Minh Ho, Khoa Ngo-Thanh Phan, Khiem Hong |
| author_facet | Tran, Dzung Tri Pham, Quang Hoang-Minh Ho, Khoa Ngo-Thanh Phan, Khiem Hong |
| contents | In this work, we study the one-loop--induced decay channel $H^{\pm} \rightarrow W^{\pm}γ$ in the general $\mathcal{R}_ξ$ gauge within Two Higgs Doublet Models. We analytically verify the gauge invariance ($ξ$-independence), ultraviolet finiteness, and renormalization-scale independence of the one-loop form factors, thereby confirming the consistency of our calculations. On the phenomenological side, we perform a parameter scan of the Type-I THDM and, based on the viable parameter space, evaluate the branching ratios of this decay process. Furthermore, we investigate charged Higgs pair production at muon-TeV colliders through the representative processes $μ^+μ^- \rightarrow H^{+}H^{-} \rightarrow W^+W^- hγ$ and $μ^+μ^- \rightarrow γγ\rightarrow H^{+}H^{-} \rightarrow W^+W^- hγ$, as typical applications of our results. The events for the processes are computed within the allowed parameter regions of the Type-I THDM. The corresponding signal significances are evaluated, including the relevant Standard Model backgrounds, at a center-of-mass energy of $\sqrt{s} = 3$~TeV. With the high integrated luminosity expected at muon-TeV colliders, reaching up to $\mathcal{L} = 3000~\text{fb}^{-1}$, our analysis indicates that the signals can be detected with a statistical significance of $5σ$ for several benchmark scenarios in the viable parameter space of the Type-I THDM. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_08417 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing one-loop--induced decay channel $H^\pm \to W^\pmγ$ in the Two Higgs Doublet Models at muon-TeV colliders Tran, Dzung Tri Pham, Quang Hoang-Minh Ho, Khoa Ngo-Thanh Phan, Khiem Hong High Energy Physics - Phenomenology In this work, we study the one-loop--induced decay channel $H^{\pm} \rightarrow W^{\pm}γ$ in the general $\mathcal{R}_ξ$ gauge within Two Higgs Doublet Models. We analytically verify the gauge invariance ($ξ$-independence), ultraviolet finiteness, and renormalization-scale independence of the one-loop form factors, thereby confirming the consistency of our calculations. On the phenomenological side, we perform a parameter scan of the Type-I THDM and, based on the viable parameter space, evaluate the branching ratios of this decay process. Furthermore, we investigate charged Higgs pair production at muon-TeV colliders through the representative processes $μ^+μ^- \rightarrow H^{+}H^{-} \rightarrow W^+W^- hγ$ and $μ^+μ^- \rightarrow γγ\rightarrow H^{+}H^{-} \rightarrow W^+W^- hγ$, as typical applications of our results. The events for the processes are computed within the allowed parameter regions of the Type-I THDM. The corresponding signal significances are evaluated, including the relevant Standard Model backgrounds, at a center-of-mass energy of $\sqrt{s} = 3$~TeV. With the high integrated luminosity expected at muon-TeV colliders, reaching up to $\mathcal{L} = 3000~\text{fb}^{-1}$, our analysis indicates that the signals can be detected with a statistical significance of $5σ$ for several benchmark scenarios in the viable parameter space of the Type-I THDM. |
| title | Probing one-loop--induced decay channel $H^\pm \to W^\pmγ$ in the Two Higgs Doublet Models at muon-TeV colliders |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.08417 |