Primordial magnetic fields from pseudo-Goldstone bosons

Details Primordial magnetic fields from pseudo-Goldstone bosons Primordial magnetic fields from pseudo-Goldstone bosons

1992-09-15

arxiv.org/abs/hep-ph/9209238v1

Phys.Rev.D46:5346-5351,1992

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages

Scientific paper

10.1103/PhysRevD.46.5346

The existence of large-scale magnetic fields in galaxies is well established, but there is no accepted mechanism for generating a primordial field which could grow into what is observed today. We discuss a model which attempts to account for the necessary primordial field by invoking a pseudo-Goldstone boson coupled to electromagnetism. The evolution of this boson during inflation generates a magnetic field; however, it seems difficult on rather general grounds to obtain fields of sufficient strength on astrophysically interesting scales.

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