New bounds on neutrino magnetic moment and re-examination of plasma effect in neutrino spin light

TL;DR

This paper investigates the bounds on neutrino magnetic moments and re-examines the plasma effect on neutrino spin light in dense matter, emphasizing the threshold role of plasmon mass and simplifying the theoretical framework.

Contribution

It provides a revised analysis of the plasmon mass impact on neutrino spin light, clarifying when it can be neglected in dense matter environments.

Findings

Plasmon mass influences the process threshold significantly.

Far from the threshold, plasmon mass effects can be ignored.

Massless photon spin light theory applies away from the threshold.

Abstract

Recent discussion on the possibility to obtain more stringent bounds on neutrino magnetic moment has stimulated new interest to possible effects induced by neutrino magnetic moment. In particular, in this note after a short review on neutrino magnetic moment we re-examine the effect of plasmon mass on neutrino spin light radiation in dense matter. We track the entry of the plasmon mass quantity in process characteristics and found out that the most substantial role it plays is the formation of the process threshold. It is shown that far from this point the plasmon mass can be omitted in all the corresponding physical quantities and one can rely on the results of massless photon spin light radiation theory in matter.