Send to

Choose Destination
See comment in PubMed Commons below
Phys Rev Lett. 2012 Jan 20;108(3):031301. Epub 2012 Jan 18.

Self-consistent evolution of magnetic fields and chiral asymmetry in the early universe.

Author information

Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, Leiden, The Netherlands.


We show that the evolution of magnetic fields in a primordial plasma, filled with standard model particles at temperatures T≳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≲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~10 MeV, which may strongly affect many processes in the early Universe.

PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for American Physical Society
    Loading ...
    Support Center