---
abstract: |
    The interactions of the neutrini and antineutrini amongst themselves, as well as the interactions of these particles with the electrons and the positrons, are of interest in simulations of the early Universe and in studies of the processes involving compact stars. The objective in this paper is to create a reliable source of information regarding the differential and total cross sections of these interactions; expressions for these observables will be obtained using standard methodology. A number of relevant discrepancies in the literature will be addressed.\
    [*PACS:*]{} 13.15.+g, 14.60.Lm, 14.60.St, 98.80.Cq
author:
- 'E. Matsinos'
title: 'Interactions relevant to the decoupling of the neutrini/antineutrini in the early Universe'
---

neutrino, differential cross section, total cross section, decoupling, early Universe

E-mail: evangelos\[dot\]matsinos\[at\]sunrise\[dot\]ch

\[sec:Introduction\]Introduction
================================

Despite the fact that the expressions for the cross sections, corresponding to the interactions of the neutrini and antineutrini (henceforth, (anti)neutrini for short) with the ingredients of the plasma of the early Universe, are straightforward to obtain, the information retrieved from several sources in the literature, be they books, scientific publications, or presentations in Conferences, is frequently incorrect. To the best of my knowledge, there is no place in the literature where the correct formulae, 