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Seed perturbations for primordial magnetic fields from MSSM flat directions

Research output: Contribution to journalJournal article


Article number1
Journal publication date8/11/2004
JournalJournal of Cosmology and Astroparticle Physics
Journal number11
Original languageEnglish


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.

Bibliographic note

4 pages, RevTeX4