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  • Open Access

Neutrino nonstandard interactions from LLE-type R-parity violation

Fang Xu*

  • *Contact author: xufang@wustl.edu
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Phys. Rev. D 114, 015004 – Published 6 July, 2026

DOI: https://doi.org/10.1103/l9gm-6g2y

Abstract

We study neutrino nonstandard interactions (NSI) induced by the trilinear LiLjEkc (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 ϵee≃8% and ϵμμ≃3.8%, while other entries are typically restricted to the subpercent level (including ϵμτ≃−0.3% in the viable off-diagonal case). We also highlight the structural origin of the different constraint patterns between τ˜R- and τ˜L-mediated scenarios and comment on the relation to the Zee model.

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Phys. Rev. D 114, 015004– Published 6 July, 2026
  • Received 8 January 2026
  • Accepted 20 May 2026
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