Using DUNE to Shed Light on the Electromagnetic Properties of Neutrinos

TL;DR

This paper evaluates DUNE's potential to improve constraints on neutrino electromagnetic properties like magnetic moments, milli-charges, and charge radii, highlighting its significant sensitivity improvements over previous experiments.

Contribution

It provides the first detailed analysis of DUNE's sensitivity to neutrino electromagnetic couplings, emphasizing its capability to set new leading bounds.

Findings

DUNE can improve the muon-neutrino magnetic moment constraint by a factor of two over LSND.

DUNE can set the strongest terrestrial bound on muon neutrino milli-charge.

DUNE may test the Standard Model prediction for the muon neutrino charge radius.

Abstract

We study future DUNE sensitivity to various electromagnetic couplings of neutrinos, including magnetic moments, milli-charges, and charge radii. The DUNE PRISM capabilities play a crucial role in constraining the electron flavored couplings. We find that DUNE will be able to place the strongest terrestrial constraint on the muon-neutrino magnetic moment by improving on LSND's bounds by roughly a factor of two, although Borexino's solar constraint will still be stronger. For the muon neutrino milli-charge DUNE can place the leading experimental bound, with two orders of magnitude improvement compared to the existing COHERENT constraint. Finally, DUNE may be able to test the SM prediction for the muon neutrino charge radius, by placing a constraint two times better than CHARM-II and CCFR experiments.