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

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arxiv hep-th/0102021 v2 pith:3GVTINMP submitted 2001-02-05 hep-th hep-ph

Manuel Perez-Victoria This is my paper · ORCID
classification hep-thhep-ph
keywords lorentzchern-simonstermviolationambiguitiesanomalyarguebreaking
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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.

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  1. Induced CFJ Term in nonlocal Lorentz-Violating QED: Natural Regularization from Entire Dirac Operators

    hep-th 2026-07 conditional novelty 5.0 of 10

    In nonlocal Lorentz-violating QED with entire form factors of the Dirac operator, the induced CFJ coefficient is finite and equals the local value times a deformation function of m/Λ.

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