Self-Consistent Evolution of Magnetic Fields and Chiral Asymmetry in the Early Universe

We show that the evolution of magnetic fields in a primordial plasma, filled with standard model particles at temperatures T greater than or similar to 10 MeV, is strongly affected by the chiral anomaly-an effect previously neglected. Although reactions, equilibrating left and right electrons, are in thermal equilibrium for T less than or similar to 80 TeV, a left-right asymmetry develops in the presence of strong magnetic fields. This results in magnetic helicity transfer from shorter to longer scales and lepton asymmetry present in the plasma until T similar to 10 MeV, which may strongly affect many processes in the early Universe.

Published in:
Physical Review Letters, 108, -

 Record created 2012-02-23, last modified 2018-03-17

Rate this document:

Rate this document:
(Not yet reviewed)