Influence of solar chaotic magnetic fields on neutrino oscillations

TL;DR

This paper investigates how random magnetic fields in the Sun's convective zone affect neutrino oscillations, analyzing experimental signals and stability of MSW regions under noise, and finds that high noise levels exclude certain neutrino parameter regions.

Contribution

It introduces a detailed analysis of the impact of stochastic magnetic fields on neutrino oscillations, extending previous models with more realistic noise considerations.

Findings

MSW regions remain stable up to high noise levels (P=0.7-0.8).

Strong noise excludes all neutrino parameter regions, challenging particle physics solutions.

Results are consistent with previous small mixing models and regular magnetic profiles.

Abstract

We consider the effect of a random magnetic field in the convective zone of the Sun on resonant neutrino spin-flavour oscillations. The expected signals in the different experiments (SK, GALLEX-SAGE,Homestake) are obtained as a function of the level of noise, regular magnetic field and neutrino mixing parameters. Previous results obtained for small mixing and ad-hoc regular magnetic profiles are reobtained. We find that MSW regions are stable up to very large levels of noise (P=0.7-0.8) and they are acceptable from the point of view of antineutrino production. For strong noise any parameter region $(\Delta m^2, \sin^2 2\theta)$ is excluded: this model of noisy magnetic field is not compatible with particle physics solutions to the SNP. scenario.