New astrophysical limit on neutrino millicharge

TL;DR

This paper derives a new, stringent astrophysical limit on the neutrino's electric charge by analyzing its interactions in astrophysical environments, providing insights into neutrino properties and their astrophysical implications.

Contribution

The paper introduces a novel astrophysical constraint on neutrino millicharge, improving previous bounds by analyzing electromagnetic interactions in dense astrophysical settings.

Findings

New limit on neutrino millicharge: q_0 < 1.3×10^{-19} e_0

Astrophysical interactions can produce observable phenomena related to neutrino charge

The limit is among the strongest astrophysical constraints to date.

Abstract

An impact of a nonzero neutrino millicharge in astrophysics is tested. It is shown that in astrophysical environments electromagnetic interactions of the neutrino millicharge with strong electromagnetic fields as well as weak interactions of the neutrinos with dense background matter can produce new phenomena accessible for astrophysical observations. On this basis a new limit on the neutrino millicharge $q_0<1.3\times10^{-19}e_0$ is obtained. This limit is among the strongest astrophysical constraint on the neutrino millicharge. Some other possible applications of the obtained results to astrophysics are discussed in details.