Transition Magnetic Moments and Collective Neutrino Oscillations:Three-Flavor Effects and Detectability

TL;DR

This paper investigates how transition magnetic moments influence three-flavor collective neutrino oscillations in supernovae, suggesting combined astrophysical and terrestrial data could reveal their non-zero nature even at very small values.

Contribution

It introduces the impact of transition magnetic moments on collective neutrino oscillations in supernovae, highlighting potential detectability with combined observational data.

Findings

Transition magnetic moments affect neutrino oscillations in supernovae.

Galactic supernova data plus terrestrial experiments can reveal non-zero magnetic moments.

Detectability is possible even for very small magnetic moments predicted by the Standard Model.

Abstract

We demonstrate the non-negligible effect of transition magnetic moments on three-flavor collective oscillations of Majorana neutrinos in the core of type-II supernovae, within the single-angle approximation. We argue that data from a galactic supernova in conjunction with terrestrial experiments can potentially give us clues about the non-zero nature of neutrino transition magnetic moments if these are Majorana fermions, even if their values are as small as those predicted by the Standard Model augmented by nonzero neutrino Majorana masses.