Reexamination of a Bound on the Dirac Neutrino Magnetic Moment from the Supernova Neutrino Luminosity

TL;DR

This paper reevaluates the upper limit on the Dirac neutrino magnetic moment by incorporating realistic supernova core models, leading to a more accurate constraint based on supernova neutrino luminosity.

Contribution

It introduces a refined analysis of neutrino helicity-flip processes using realistic supernova core models, improving previous bounds on the neutrino magnetic moment.

Findings

New upper bound on Dirac neutrino magnetic moment established

Realistic supernova core models significantly affect the luminosity constraints

Enhanced understanding of neutrino properties in supernova environments

Abstract

The neutrino helicity-flip process under the conditions of the supernova core is reinvestigated. Instead of the uniform ball model for the SN core used in previous analyses, realistic models for radial distributions and time evolution of physical parameters in the SN core are considered. A new upper bound on the Dirac neutrino magnetic moment is obtained from the limit on the supernova core luminosity for nu_R emission.