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| Format: | Preprint |
| Published: |
2025
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| Online Access: | https://arxiv.org/abs/2512.20704 |
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| _version_ | 1866917167447932928 |
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| author | Xu, Fang |
| author_facet | Xu, Fang |
| contents | We study neutrino non-standard interactions (NSI) induced by the trilinear $LLE$ couplings in $R$-parity-violating supersymmetry in a split-family spectrum where third-generation sleptons can be comparatively light. We systematically classify the relevant coupling patterns, derive the corresponding effective interactions and NSI parameters, and confront the resulting parameter space with a broad set of experimental constraints. We find that percent-level NSI can be realized in selected channels, with the largest magnitudes reaching $\varepsilon_{ee}\simeq 8\%$ and $\varepsilon_{μμ}\simeq 3.8\%$, while other entries are typically restricted to the sub-percent level (including $\varepsilon_{μτ}\simeq -0.3\%$ in the viable off-diagonal case). We also highlight the structural origin of the different constraint patterns between $\widetildeτ_R$- and $\widetildeτ_L$-mediated scenarios and comment on the relation to the Zee model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_20704 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Neutrino Non-Standard Interactions from LLE-type R-parity Violation Xu, Fang High Energy Physics - Phenomenology We study neutrino non-standard interactions (NSI) induced by the trilinear $LLE$ couplings in $R$-parity-violating supersymmetry in a split-family spectrum where third-generation sleptons can be comparatively light. We systematically classify the relevant coupling patterns, derive the corresponding effective interactions and NSI parameters, and confront the resulting parameter space with a broad set of experimental constraints. We find that percent-level NSI can be realized in selected channels, with the largest magnitudes reaching $\varepsilon_{ee}\simeq 8\%$ and $\varepsilon_{μμ}\simeq 3.8\%$, while other entries are typically restricted to the sub-percent level (including $\varepsilon_{μτ}\simeq -0.3\%$ in the viable off-diagonal case). We also highlight the structural origin of the different constraint patterns between $\widetildeτ_R$- and $\widetildeτ_L$-mediated scenarios and comment on the relation to the Zee model. |
| title | Neutrino Non-Standard Interactions from LLE-type R-parity Violation |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.20704 |