Lepton asymmetries and the growth of cosmological seed magnetic fields

Abstract

Primordial cosmological hypermagnetic fields polarize the early Universe plasma prior to the electroweak phase transition (EWPT). As a result of the long range parity violating gauge interaction present in the Standard Model their magnitude gets amplified, opening a new, perturbative way, of accounting for the observed intergalactic magnetic fields.

Comments: 4 pages, no figures, final published version available online at http://www.iop.org/EJ/abstract/1029-8479/2008/03/067