On Some Properties of the Neutrino in The Early Universe

TL;DR

This paper investigates neutrino properties in the early universe, focusing on how small inhomogeneities affect their mean free path, mass bounds, and flavor oscillations, revealing new insights into their behavior during that epoch.

Contribution

It introduces a model considering inhomogeneities in the early universe to analyze neutrino mean free path, mass bounds, and flavor oscillations with a wave packet approach.

Findings

Inhomogeneities influence neutrino mean free path and mass bounds.

Neutrino flavor oscillations are affected by early universe conditions.

Wave packet analysis yields new insights into neutrino behavior.

Abstract

The properties of the neutrino in the early universe have been investigated incorporating a small inhomogeneity in the mass density of the early universe. Dependence on this factor is found in studying mean free path and mass bound of neutrinos. The oscillations of neutrinos flavours have been studied by assuming a free wave packet to represent the time progression of the neutrino yielding interesting results.