Is the baryon asymmetry of the Universe related to galactic magnetic fields?

TL;DR

This paper explores how hypermagnetic fields generated before the electroweak phase transition could explain the Universe's baryon asymmetry and relate to observed galactic magnetic fields, linking early Universe physics to current cosmological observations.

Contribution

It proposes a mechanism connecting pre-EWPT hypermagnetic fields to baryon asymmetry and large-scale cosmic magnetic fields, providing a unified explanation for both phenomena.

Findings

Hypermagnetic fields can polarize the early Universe plasma at high redshifts.

Leptogenesis via anomalous electron current violation converts to baryon asymmetry.

Inferred magnetic field strengths match observed cosmological magnetic fields.

Abstract

A tiny hypermagnetic field generated before the electroweak phase transition (EWPT) associated to the generation of elementary particle masses can polarize the early Universe hot plasma at huge redshifts z > 10^15. The anomalous violation of the right-handed electron current characteristic of the EWPT converts the lepton asymmetry into a baryon asymmetry. Under reasonable approximations, the magnetic field strength inferred by requiring such "leptogenic" origin for the observed baryon asymmetry of the Universe matches the large-scale cosmological magnetic field strengths estimated from current astronomical observations.