Method of wave equations exact solutions in studies of neutrinos and electrons interaction in dense matter

TL;DR

This paper introduces a powerful method using exact solutions of modified Dirac equations to study neutrino and electron interactions in dense matter, revealing new phenomena and mechanisms of electromagnetic radiation.

Contribution

It develops a method based on exact solutions of modified Dirac equations for particles in matter, enabling analysis of various phenomena and proposing new radiation mechanisms.

Findings

Exact solutions for neutrino and electron in matter obtained

Neutrino reflection, trapping, and energy quantization analyzed

New electromagnetic radiation mechanism predicted

Abstract

We present quite a powerful method in investigations of different phenomena that can appear when neutrinos and electrons propagate in background matter. This method implies use of exact solutions of modified Dirac equations that contain the correspondent effective potentials accounting for the matter influence on particles. For several particular cases the exact solutions of modified Dirac and Dirac-Pauli equations for a neutrino and an electron in the background environment of different composition are obtained (the case of magnetized matter is also considered). Neutrino reflection, trapping, neutrino pair creation and annihilation in matter and neutrino energy quantization in a rotating medium are discussed. The neutrino Green functions in matter are also derived. The two recently proposed mechanisms of electromagnetic radiation by a neutrino and an electron in matter (the spin light of neutrino and electron, $SL\nu$ and $SLe$) are considered. A possibility to introduce an effective "matter-induced Lorentz force" acting on a neutrino and an electron is discussed. A new mechanism of electromagnetic radiation that can be emitted by an electron moving in the neutrino background with non-zero gradient of density is predicted.