Probing strange-sector flavor-changing neutral currents at DUNE-like facilities

Abstract

We investigate the sensitivity of DUNE-like facilities to flavor-changing neutral-current interactions between down and strange quarks through inclusive deep-inelastic neutrino scattering. In the framework of a general low-energy effective Lagrangian for Dirac and Majorana neutrinos, we evaluate projected sensitivities for CP- and τ-optimized beam configurations. The strongest bounds on the dimensionless Wilson coefficients, defined relative to the Fermi constant G_F, reach 𝒪(10⁻³)−−𝒪(10⁻²) at the near detector, whereas far-detector limits are roughly one order of magnitude weaker. When systematic uncertainties are included, the near-detector sensitivity is dominated by the background-rate uncertainty, while the far-detector sensitivity is limited primarily by the signal-rate uncertainty. At the far detector, the dependence of the projected bounds on the neutrino mass ordering and the Dirac CP-violating phase δ_CP is largely confined to coefficients involving the electron flavor.

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BibTeX RIS

BibTeX

@misc{yan2026probing,
  title = {{Probing strange-sector flavor-changing neutral currents at DUNE-like facilities}},
  author = {Xin-Shuai Yan and Miao Liu and Qin Chang and Ya-Dong Yang},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.29178},
  eprint = {2608.29178},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.29178},
}

RIS

TY  - UNPB
TI  - Probing strange-sector flavor-changing neutral currents at DUNE-like facilities
AU  - Xin-Shuai Yan
AU  - Miao Liu
AU  - Qin Chang
AU  - Ya-Dong Yang
PY  - 2026
DA  - 2026/08/29
PB  - arXiv
DO  - 10.48550/arxiv.2608.29178
UR  - https://arxiv.org/abs/2608.29178
AB  - We investigate the sensitivity of DUNE-like facilities to flavor-changing neutral-current interactions between down and strange quarks through inclusive deep-inelastic neutrino scattering. In the framework of a general low-energy effective Lagrangian for Dirac and Majorana neutrinos, we evaluate projected sensitivities for CP- and τ-optimized beam configurations. The strongest bounds on the dimensionless Wilson coefficients, defined relative to the Fermi constant G_F, reach 𝒪(10^−3)−−𝒪(10^−2) at the near detector, whereas far-detector limits are roughly one order of magnitude weaker. When systematic uncertainties are included, the near-detector sensitivity is dominated by the background-rate uncertainty, while the far-detector sensitivity is limited primarily by the signal-rate uncertainty. At the far detector, the dependence of the projected bounds on the neutrino mass ordering and the Dirac CP-violating phase δ_CP is largely confined to coefficients involving the electron flavor.
ER  -

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