Seed perturbations for primordial magnetic fields from MSSM flat directions

2004/04/29 by Kari Enqvist, Asko Jokinen, Anupam Mazumdar
Physics and Astronomy · #hep-ph #astro-ph #hep-th

paper · pdf · doi:10.1088/1475-7516/2004/11/001

published as JCAP 0411 (2004) 001 · 4 pages, RevTeX4

arxiv created 2004/04/29 · arxiv updated 2009/12/01

Abstract

We demonstrate that the MSSM flat directions can naturally account for the seed magnetic fields in the early Universe. The non-zero vacuum expectation value of an MSSM flat direction condensate provides masses to the gauge fields and thereby breaks conformal invariance. During inflation the condensate receives spatial perturbations and SU(2) x U(1)_Y gauge currents are generated together with (hyper)magnetic fields. When these long wavelength vector perturbations reenter our horizon they give rise to U(1)_em magnetic fields with an amplitude of 10^-30 Gauss, as required by the dynamo mechanism.

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