Radiatively induced Lorentz and CPT violation in Schwinger constant field approximation

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...

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Bibliographic Details
Main Author: Chaichian, M. (author)
Other Authors: Chen, W. F. (author), Felipe, Ricardo Gonzalez (author)
Format: article
Language:eng
Published: 2014
Subjects:
Chern-Simons Term
Differential Regularization
Derivative Expansion
Standard Model
Electrodynamics
Limits
Online Access:http://hdl.handle.net/10400.21/3600
Country:Portugal
Oai:oai:repositorio.ipl.pt:10400.21/3600
Description
Summary: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. (C) 2001 Published by Elsevier Science B.V.

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