The consequences of large \theta_13 for the turbulence signatures in supernova neutrinos

TL;DR

This paper investigates how the recently measured large neutrino mixing angle _13 influences flavor transformation signatures in supernova neutrinos, revealing that larger _13 makes neutrinos more resistant to small turbulence effects but more sensitive at higher turbulence amplitudes.

Contribution

It provides a detailed analysis of the impact of the large _13 on turbulence effects in supernova neutrino flavor transformation, highlighting the dependence on turbulence amplitude and mixing channels.

Findings

Large _13 reduces turbulence effects at low amplitudes

Turbulence effects become significant at C* > 10%

Non-resonant channels are more sensitive to turbulence with large _13

Abstract

The set of transition probabilities for a single neutrino emitted from a point source after passage through a turbulent supernova density profile have been found to be random variates drawn from parent distributions whose properties depend upon the stage of the explosion, the neutrino energy and mixing parameters, the observed channel, and the properties of the turbulence such as the amplitude C*. In this paper we examine the consequences of the recently measured mixing angle \theta_13 upon the neutrino flavor transformation in supernova when passing through turbulence. We find the measurements of a relatively large value of \theta_13 means the neutrinos are relatively immune to small, C* < 1%, amplitude turbulence but as C* increases the turbulence effects grow rapidly and spread to all mixing channels. For C* > 10% the turbulence effects in the high (H) density resonance mixing channels are independent of \theta_13 but non-resonant mixing channels are more sensitive to turbulence when \theta_13 is large.