Structure of radiatively induced Lorentz and CPT violation in QED at finite temperature - art. no. 105003

Citation
L. Cervi et al., Structure of radiatively induced Lorentz and CPT violation in QED at finite temperature - art. no. 105003, PHYS REV D, 6410(10), 2001, pp. 5003
Citations number
30
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW D
ISSN journal
0556-2821 → ACNP
Volume
6410
Issue
10
Year of publication
2001
Database
ISI
SICI code
0556-2821(20011115)6410:10<5003:SORILA>2.0.ZU;2-#
Abstract
We obtain the induced Lorentz- and CPT-violating term in QED at finite temp erature using the imaginary-time formalism and dimensional regularization. Its form resembles a Chem-Simons-like structure, but, unexpectedly, it does not depend on the temporal component of the fixed b(mu) constant vector th at is coupled to the axial-vector current. Nevertheless, Ward identities ar e respected and its coefficient vanishes at T = 0, consistent with previous computations with the same regularization procedure, and it is a nontrivia l function of temperature. We argue that at finite T a Chern-Simons-like Lo rentz- and CPT-violating term is generically present, the value of its coef ficient being unambiguously determined up to a T-independent constant, rela ted to the zero-temperature renormalization conditions.