Decoherence-effects in the neutrino-mixing mechanism: active and sterile neutrinos in the three flavor scheme

TL;DR

This paper investigates how quantum decoherence influences neutrino flavor oscillations in supernova-like environments, focusing on active and sterile neutrino mixing schemes and their dependence on various parameters.

Contribution

It provides a detailed analysis of decoherence effects on neutrino polarization precession in different mixing scenarios, including active and sterile neutrinos.

Findings

Decoherence onset varies significantly with mixing parameters.

Active-sterile neutrino mixing shows distinct decoherence behavior.

Results highlight the importance of mixing scheme parameters on decoherence effects.

Abstract

In this work we analyze the effects of quantum decoherence upon the precession of the neutrino polarization vector in a supernovae-like environment. In order to perform the study we have determined the time-dependence of the polarization vector by solving the equation of motion for different neutrino-mixing schemes. The results of the calculations show that the onset of decoherence depends strongly on the parameters of the adopted mixing scheme. As examples we have considered : a) the mixing between active neutrinos and b) the mixing between active end sterile neutrinos.