On the consistency of Lorentz invariance violation in QED induced by fermions in constant axial-vector background

Alfaro, J.; Andrianov, A. A.; Cambiaso, M.; Giacconi, P.; Soldati, R.

On the consistency of Lorentz invariance violation in QED induced by fermions in constant axial-vector background

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Description

We show for the first time that the induced parity--even Lorentz invariance violation can be unambiguously calculated in the physically justified and minimally broken dimensional regularization scheme, suitably tailored for a spontaneous Lorentz symmetry breaking in a field theory model. The quantization of the Lorentz invariance violating quantum electrodynamics is critically examined and shown to be consistent either for a light--like cosmic anisotropy axial--vector or for a time--like one, when in the presence of a bare photon mass.
10 pages, revised for publication in Phys.Lett. B