Dynamical Lorentz and CPT symmetry breaking in a 4D four-fermion model

被引：18

作者：

Gomes, M. ^{[1
]}

Mariz, T. ^{[1
]}

Nascimento, J. R. ^{[1
,2
]}

da Silva, A. J. ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[2] Univ Fed Paraiba, Dept Fis, BR-58051970 Joao Pessoa, Paraiba, Brazil

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 10期

关键词：

D O I：

10.1103/PhysRevD.77.105002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In a 4D chiral Thirring model we analyze 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 (psi) over bar gamma(mu)gamma(5)psi may assume a nonzero vacuum expectation value which triggers Lorentz and CPT violations. Furthermore, by making fluctuations on the minimum of the potential we dynamically induce a bumblebee-like model containing a Chem-Simons term.

引用

页数：6

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