Varying Electromagnetic Coupling and Primordial Magnetic Fields

Details Varying Electromagnetic Coupling and Primordial Magnetic Fields Varying Electromagnetic Coupling and Primordial Magnetic Fields

2005-04-08

arxiv.org/abs/astro-ph/0504211v1

Phys.Rev.D71:123525,2005

Astronomy and Astrophysics

Astrophysics

Revtex4, 7 pages, 1 figure

Scientific paper

10.1103/PhysRevD.71.123525

We study the effect of variations of the electromagnetic coupling on the process of generation of primordial magnetic fields. We find that only through a significant growth of the electromagnetic coupling minimum seed fields can be produced. We also show that, if through some process in the early Universe the photon acquires a mass that leads, thanks to inflation, to the generation of primordial magnetic fields, then the influence of variations of the electromagnetic coupling amounts essentially to the results due to the photon effective mass alone.

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