Seed perturbations for primordial magnetic fields from MSSM flat directions

Kari Enqvist, Asko Jokinen, Anupam Mazumdar

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We demonstrate that the minimally supersymmetric standard model (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) × U(1)Y gauge currents are generated together with (hyper)magnetic fields. When these long wavelength vector perturbations re-enter our horizon they give rise to U(1)em magnetic fields with an amplitude of 10−30 G, as required by the dynamo mechanism.
Original languageEnglish
Article number001
Number of pages7
JournalJournal of Cosmology and Astroparticle Physics
Issue number11
Publication statusPublished - Nov-2004
Externally publishedYes

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