Primordial Magnetic Fields via Spontaneous Breaking of Lorentz Invariance

Details Primordial Magnetic Fields via Spontaneous Breaking of Lorentz Invariance Primordial Magnetic Fields via Spontaneous Breaking of Lorentz Invariance

1998-11-25

arxiv.org/abs/gr-qc/9811087v2

Phys.Lett.B455:96-103,1999

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Final version to appear in Physics Letters B

Scientific paper

10.1016/S0370-2693(99)00418-9

Spontaneous breaking of Lorentz invariance compatible with observational limits may realistically take place in the context of string theories, possibly endowing the photon with a mass. In this process the conformal symmetry of the electromagnetic action is broken allowing for the possibility of generating large scale ($\sim Mpc$) magnetic fields within inflationary scenarios. We show that for reheating temperatures safe from the point of view of the gravitino and moduli problem, $T_{RH} \laq 10^{9} GeV$ for $m_{3/2} \approx 1 TeV$, the strength of the generated seed fields is, in our mechanism, consistent with amplification by the galactic dynamo processes and can be even as large as to explain the observed galactic magnetic fields through the collapse of protogalactic clouds.

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