arXiv:hep-ph/9209238·v1·High Energy Physics — Phenomenology
Primordial magnetic fields from pseudo-Goldstone bosons
W. Daniel Garretson🇺🇸 · George B. Field🇺🇸 · Sean M. Carroll (Harvard-Smithsonian Center for 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.
Comments: 18 pages