2007/09/30 by M. Gomes, T. Mariz, J. R. Nascimento +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #hep-th
paper · pdf · doi:10.1103/physrevd.77.105002
published as Phys.Rev.D77:105002,2008 · Small modifications in the text and new references added, 12 pages, 4 figures, revtex4. To appear in Phys. Rev. D
arxiv created 2008/03/27 · openalex publication_date 2008/05/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 \ensuremathψ\ensuremathγ^\ensuremathμ\ensuremathγ5\ensuremathψ 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 Chern-Simons term.