Neutrino electromagnetic properties and new physics

TL;DR

This paper explores how neutrino electromagnetic properties influence dense magnetized rotating matter, predicts neutrino spatial separation effects, introduces a new star rotation mechanism, and sets a stringent limit on neutrino millicharge.

Contribution

It presents a novel mechanism for star rotation frequency shifts caused by neutrinos and derives a new, strong astrophysical limit on neutrino millicharge.

Findings

Predicted spatial separation of neutrinos and antineutrinos in dense matter.

Introduced the 'Neutrino Star Turning' mechanism for pulsar glitches.

Set a new upper limit on neutrino millicharge: $q_{\nu}<1.3\times10^{-19}e_0$.

Abstract

New effects of nontrivial neutrino electromagnetic properties are investigated on the basis of exact solutions of the modified Dirac equations for neutrinos in dense magnetized rotating matter. The effect of spatial separation of different types of neutrinos and antineutrinos (different in flavors and energies) moving inside dense magnetized rotating matter is predicted. We also describe a new mechanism of a star rotation frequency shift by neutrinos escaping the star (termed "Neutrino Star Turning" mechanism, $\nu S T$). The $\nu S T$ mechanism can explain the origin of pulsar "anti-glitches" and ordinary glitches as well. Considering a possible effect of the $\nu S T$ mechanism on speeding up of a pulsar together with the observational data on pulsars, we obtain a new limit on a neutrino millicharge $q_{\nu}<1.3\times10^{-19}e_0$ that is one of the strongest limits on this value obtained in astrophysics.