Primordial magnetic fields from pseudo-Goldstone bosons
High Energy Physics - Phenomenology
2011-05-05 v1 Astrophysics
Abstract
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.
Keywords
Cite
@article{arxiv.hep-ph/9209238,
title = {Primordial magnetic fields from pseudo-Goldstone bosons},
author = {W. Daniel Garretson and George B. Field and Sean M. Carroll},
journal= {arXiv preprint arXiv:hep-ph/9209238},
year = {2011}
}
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18 pages