Spin-flavour conversions of neutrinos in collapsing stars

TL;DR

This paper explores how neutrino spin-flavour conversions occur in collapsing stars and discusses potential experimental signatures, emphasizing the effects of magnetic fields and neutrino properties.

Contribution

It provides a detailed analysis of neutrino spin-flavour conversions in collapsing stars and identifies observable effects for specific neutrino magnetic moments and mass differences.

Findings

Observable effects may exist for neutrino magnetic moments around 2-3 x 10^{-14} μ_B

Signatures depend on magnetic field strength and neutrino mass squared differences

Potential experimental signatures could help detect neutrino magnetic properties

Abstract

I discuss in some detail the spin-flavour conversions of neutrinos in the almost isotopically neutral region of collapsing stars along with the resulting experimental signatures. In particular, I show that for realistic magnetic field strength, the observable effects may exist for neutrino magnetic moment, $\mu \sim (2-3)\times 10^{-14}\mu_B$ ($\mu_B$ is the Bohr magneton) with relevant neutrino mass squared difference, $\Delta m^2 \sim (10^{-9}-10^{-8}) eV^2$.