期刊
PHYSICS LETTERS B
卷 749, 期 -, 页码 304-308出版社
ELSEVIER
DOI: 10.1016/j.physletb.2015.08.004
关键词
Spontaneous Lorentz violation; Bumblebee model; Radiative corrections
资金
- Brazilian agencies Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [23038007567/2011-46]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [305766/2012-0]
We investigate some quantum features of the bumblebee electrodynamics in flat spacetimes. The bumblebee field is a vector field that leads to a spontaneous Lorentz symmetry breaking. For a smooth quadratic potential, the massless excitation (Nambu-Goldstone boson) can be identified as the photon, transversal to the vacuum expectation value of the bumblebee field. Besides, there is a massive excitation associated with the longitudinal mode and whose presence leads to instability in the spectrum of the theory. By using the principal-value prescription, we show that no one-loop radiative corrections to the mass term is generated. Moreover, the bumblebee self-energy is not transverse, showing that the propagation of the longitudinal mode cannotbe excluded from the effective theory. (C) 2015 The Authors. Published by Elsevier B.V.
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