Collective neutrino oscillations with the halo effect in single-angle approximation

TL;DR

This paper investigates how the Halo effect influences collective neutrino oscillations in supernovae, showing it causes earlier flavor transformations but preserves the spectral split phenomenon.

Contribution

It introduces a self-consistent calculation of neutrino oscillations including the Halo effect within the single-angle approximation in supernova models.

Findings

Halo effect shifts flavor transformation onset inward by a few kilometers

Spectral split remains robust despite the Halo effect

Self-consistent modeling of neutrino oscillations with Halo effect

Abstract

We perform a self-consistent calculation of collective neutrino oscillations including the effect of back scattered neutrinos (Halo effect) in the `single-angle' approximation, within a spherically symmetric supernova model. We find that due to the Halo effect the onset of flavor transformations is pushed to smaller radii, by a few kilometers. The celebrated phenomenon of the spectral split is found to be robust under the present inclusion of the Halo effect.