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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2604.08444 |
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| _version_ | 1866911578736033792 |
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| author | Nha, N. H. T. Hue, L. T. Phuong, L. T. T. Hong, T. T. |
| author_facet | Nha, N. H. T. Hue, L. T. Phuong, L. T. T. Hong, T. T. |
| contents | We investigate an extended 3-4-1 model consisting of a new singly charged Higgs boson, implementing the minimal inverse seesaw mechanism to accommodate the large values of the $(g-2)_{e,μ}$ anomalies as well as the lepton-flavor-violating decay rates of charged leptons, the Standard Model-like Higgs boson, and the $Z$ boson, all consistent with current experimental data. Unlike the previously studied 3-4-1 realization, the model considered here predicts strong correlations among these observables that can be tested in future experiments. In particular, the current upper bound on Br$(τ\to μγ)$ imposes a stringent constraint compatible with the $1σ$ experimental range of $(g-2)_μ$, corresponding to a maximal deviation of $10^{-9}$ from the SM prediction. The forthcoming experimental sensitivity to Br$(τ\to μγ)$ will reduce this deviation to $5\times 10^{-10}$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_08444 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | LFV decays in a 3-4-1 model with minimal inverse seesaw neutrinos Nha, N. H. T. Hue, L. T. Phuong, L. T. T. Hong, T. T. High Energy Physics - Phenomenology We investigate an extended 3-4-1 model consisting of a new singly charged Higgs boson, implementing the minimal inverse seesaw mechanism to accommodate the large values of the $(g-2)_{e,μ}$ anomalies as well as the lepton-flavor-violating decay rates of charged leptons, the Standard Model-like Higgs boson, and the $Z$ boson, all consistent with current experimental data. Unlike the previously studied 3-4-1 realization, the model considered here predicts strong correlations among these observables that can be tested in future experiments. In particular, the current upper bound on Br$(τ\to μγ)$ imposes a stringent constraint compatible with the $1σ$ experimental range of $(g-2)_μ$, corresponding to a maximal deviation of $10^{-9}$ from the SM prediction. The forthcoming experimental sensitivity to Br$(τ\to μγ)$ will reduce this deviation to $5\times 10^{-10}$. |
| title | LFV decays in a 3-4-1 model with minimal inverse seesaw neutrinos |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2604.08444 |