Radiatively Induced Lorentz and CPT Violation in Schwinger Constant Field Approximation
arXiv:hep-th/0010129 · doi:10.1016/S0370-2693(01)00196-4
Abstract
The Schwinger proper-time method is an effective calculation method, explicitly gauge invariant and nonperturbative. We make use of this method to investigate the radiatively induced Lorentz and CPT-violating effects in quantum electrodynamics when an axial vector interaction term is introduced in the fermionic sector. The induced Lorentz and CPT-violating Chern-Simons term coincides with the one obtained using a covariant derivative expansion but differs from the result usually obtained in other regularization schemes. A possible ambiguity in the approach is also discussed.
11 pages, REVTeX, typos and a few equations corrected, a comment added to the conclusions, acknowledgments added
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Cited by in corpus (40)
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