New mechanism for the generation of primordial seeds for the cosmic magnetic fields

Astronomy and Astrophysics – Astrophysics

Scientific paper

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5 pages, Latex, one figure included using epsfig. Four references and a short discussion added. To appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.63.047301

We discuss the inflationary production of magnetic seeds for the galactic dynamo through the photon-graviphoton mixing typical of extended models of local supersymmetry. An analisys of the allowed region in parameter space shows that such a mechanism is compatible with existing phenomenological bounds on the vector mass and on the mixing parameter, but requires a large enough mixing that seems difficult to implement naturally in the context of a minimal supersymmetric scenario.

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