Physical (ir)relevance of ambiguities to Lorentz and CPT violation in QED

Preprint

5 February 2001

preprint
Published by arXiv in arXiv

Abstract

We discuss the regularization and renormalization of QED with Lorentz and CPT violation, and argue that the coefficient of the Chern-Simons term is an independent parameter not determined by gauge invariance. We also study these issues in a model with spontaneous breaking of Lorentz and CPT symmetries and find an explicit relation with the ABJ anomaly. This explains the observed convergence of the induced Chern-Simons term.

Keywords

LORENTZ AND CPT
CPT VIOLATION
CHERN SIMONS
SIMONS TERM
ANOMALY
QED

All Related Versions

Version 1, 2001-02-05, ArXiv
Version 2, 2001-02-22, ArXiv
Published version: Journal of High Energy Physics, 2001 (4), 032.

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