Dynamical Lorentz and CPT symmetry breaking in a 4D four-fermion model
High Energy Physics - Theory
2008-11-26 v2
Abstract
In a 4D chiral Thirring model we analyse the possibility that radiative corrections may produce spontaneous breaking of Lorentz and CPT symmetry. By studying the effective potential, we verified that the chiral current may assume a nonzero vacuum expectation value which triggers the Lorentz and CPT violations. Furthermore, by making fluctuations on the minimum of the potential we dynamically induce a bumblebee like model containing a Chern-Simons term.
Cite
@article{arxiv.0709.2904,
title = {Dynamical Lorentz and CPT symmetry breaking in a 4D four-fermion model},
author = {M. Gomes and T. Mariz and J. R. Nascimento and A. J. da Silva},
journal= {arXiv preprint arXiv:0709.2904},
year = {2008}
}
Comments
Small modifications in the text and new references added, 12 pages, 4 figures, revtex4. To appear in Phys. Rev. D