Spin Flavor Spectral Splits of Supernova Neutrino Flavor Conversions

Abstract

The supernova neutrino flavor evolution in the presence of the non-trivial neutrino magnetic moment and strong magnetic field is numerically derived using the two-flavor and single-angle approximation. The novel properties of collective neutrino oscillations are studied and distinct patterns of flavor and spin-flavor spectral splits are presented. Finally we also discuss how the neutrino magnetic moment affects the observable supernova neutrino energy spectra.

Collective neutrino oscillations in moving and polarized matter

“…The authors of [3,4] for the first time studied collective neutrino oscillation accounting for transitions between states with different helicity engendered by interaction of the neutrino magnetic moment with a magnetic field. Later, the problem of spin oscillations in collective effects was studied by different scientific groups (see, for example, [5,6] and references therein). In [7] the effect of spin oscillations engendered by transversally moving matter was included in collective neutrino oscillation.…”

Neutrino-antineutrino oscillations induced by strong magnetic fields in dense matter

“…The neutrino-antineutrino oscillations considering neutrino-neutrino interactions are studied in Refs. [88][89][90][91][92]. The flavor equilibration of neutrino-antineutrino oscillations occurs in the scale determined by a neutrino magnetic potential in strong magnetic fields [91].…”