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Seed perturbations for primordial magnetic fields from MSSM flat directions

Kari Enqvist·Asko Jokinen·Anupam Mazumdar
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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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Kari Enqvist, Asko Jokinen, Anupam Mazumdar. 2004-04-29. Seed perturbations for primordial magnetic fields from MSSM flat directions. https://doi.org/10.1088/1475-7516%2F2004%2F11%2F001

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