Radiatively induced Lorentz and CPT violation in Schwinger constant field approximation

被引：47

作者：

Chaichian, M ^{[1
]}

Chen, WF

Felipe, RG

机构：

[1] Univ Helsinki, Dept Phys, High Energy Phys Div, FIN-00014 Helsinki, Finland

[2] Helsinki Inst Phys, FIN-00014 Helsinki, Finland

[3] Univ Guelph, Dept Math & Stat, Guelph, ON N1G 2W1, Canada

[4] Inst Super Tecn, Ctr Fis Interaccoes Fundamentals, P-1049001 Lisbon, Portugal

来源：

PHYSICS LETTERS B | 2001年 / 503卷 / 1-2期

基金：

芬兰科学院; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/S0370-2693(01)00196-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页码：215 / 222

页数：8

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