Spin Light of Electron in Matter

Abstract

We further generalize the powerful method, which we have recently developed for description of the background matter influence on neutrinos, for the case of an electron moving in matter. On the basis of the modified Dirac equation for the electron, accounting for the standard model interaction with particles of the background, we predict and investigate in some detail a new mechanism of the electromagnetic radiation that is emitted by moving in matter electron due to its magnetic moment. We have termed this radiation the "spin light of electron" in matter and predicted that this radiation can have consequences accessible for experimental observations in astrophysical and cosmological settings.

PLASMA INDUCED FERMION SPIN–FLIP CONVERSION fL → fR + γ

“…We do not present here the contribution into V caused by the weak interaction, because in real astrophysical conditions the electromagnetic contribution V em always dominates, except for the unphysical case of a pure neutron medium considered in Refs. [31] - [33]. It should be noted that even in the conditions of a cold neutron star, the fraction of electrons and protons cannot be exacly zero, Y e 0.01.…”

“…We have to note that in Refs. [19,20,24], [31] - [33] the authors claimed to obtain the exact solution of the modified Dirac equation for a fermion in plasma. However, it can be easily seen that at least in one case their solution is simply incorrect.…”

“…As was already mentioned, in the papers [31] - [33] the authors have extended their approach to the so-called "spin light of electron" (SLe), e L → e R + γ. However, the same mistake of ignoring the photon dispersion in plasma was repeated there.…”

“…As will be shown below, this phenomenon closes the SLν effect for all real astrophysical situations. [25] - [30] In the recent papers [31] - [33] the authors have extended their approach to the so-called "spin light of electron" (SLe), e L → e R + γ. It will be shown that just the same mistake of ignoring the photon dispersion in plasma was repeated in these papers.…”

“…The plasma effects which generate the photon mass m γ also generate corrections to the electron mass such that the decay γ → e + e − is always kinematically forbidden." Thus, the authors [14] - [24], [31] - [33] made the same mistake when they considered the plasma-induced additional neutrino or electron energy and ignored the effective photon mass m γ arising by the same reason.…”