Kinetic description of W and Z boson creation in the early universe

TL;DR

This paper proposes a novel mechanism where vacuum pair creation of W and Z bosons during the electroweak phase transition could account for the cosmic microwave background radiation, supported by an exactly solvable kinetic model.

Contribution

It introduces an exactly solvable kinetic model for vacuum pair creation of vector bosons in the early universe, linking it to CMB photon production.

Findings

The model suggests sufficient CMB photons can be produced via W and Z boson decay.

Vacuum pair creation of vector bosons is a plausible early universe mechanism.

Preliminary estimates support the viability of this process for explaining CMB density.

Abstract

We consider an alternative mechanism for the production of the cosmic microwave background (CMB) radiation. It is basically due to vacuum pair creation (VPC) of vector bosons (W and Z) as a consequence of a rapid W and Z mass generation during the electroweak phase transition in the early Universe. The mechanism is as follows: after their pair crreation, the vector bosons may either annihilate directly into photons or decay into leptons and quarks which subsequently annihilate as lepton-antilepton and quark-antiquark pairs into photons. Preliminary estimates show that the number of CMB photons obtained this way can be sufficient to explain the presently observed CMB photon density. In this contribution we present an exactly soluble model for vacuum pair creation kinetics.