Nonstandard neutrino interactions and transition magnetic moments

Abstract

We constrain generic nonstandard neutrino interactions with existing experimental data on neutrino transition magnetic moments and derive strong bounds on tensorial couplings of neutrinos to charged fermions. We also discuss how some of these tensorial couplings can be constrained by other experiments, e.g., on neutrino-electron and neutrino-nucleus scattering.

Comments: 7 pages, 1 figure, 1 table; the entries in the central column of Table I are corrected by the factor of 2, and a misprint in Eq. (17) is corrected