Primordial torsion fields as an explanation of the anisotropy in cosmological electromagnetic propagation

Details Primordial torsion fields as an explanation of the anisotropy in cosmological electromagnetic propagation Primordial torsion fields as an explanation of the anisotropy in cosmological electromagnetic propagation

1997-06-04

arxiv.org/abs/astro-ph/9706044v2

Mod.Phys.Lett.A12:3003-3007,1997

Astronomy and Astrophysics

Astrophysics

8 pages, LaTeX, one figure, enlarged version with minor corrections

Scientific paper

10.1142/S0217732397003125

In this note we provide a simple explanation of the recent finding of anisotropy in electromagnetic (EM) propagation claimed by Nodland and Ralston (astro-ph/9704196). We consider, as a possible origin of such effect, the effective coupling between EM fields and some tiny background torsion field. The coupling is obtained after integrating out charged fermions, it is gauge invariant and does not require the introduction of any new physics.

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