2,436 research outputs found
On the induction of the four-dimensional Lorentz-breaking non-Abelian Chern-Simons action
A four-dimensional Lorentz-breaking non-Abelian Chern-Simons like action is
generated as a one-loop perturbative correction via an appropriate
Lorentz-breaking coupling of the non-Abelian gauge field to the spinor field.
This term is shown to be regularization dependent but nevertheless it can be
found unambiguously in different regularization schemes at zero and finite
temperature.Comment: accepted version in Physical Review
On the aether-like Lorentz-breaking actions
We demonstrate the generation of the CPT-even, aether-like Lorentz-breaking
actions for the scalar and electromagnetic fields via their appropriate
Lorentz-breaking coupling to spinor fields in three, four and five space-time
dimensions. Besides, we show that the aether-like terms for the spinor field
also can be generated as a consequence of the same couplings. Also we discuss
the dispersion relations in the theories with aether-like Lorentz-breaking
terms and find the tree-level effective (Breit) potential for fermion
scattering and the one-loop effective potential corresponding to the action of
the scalar field.Comment: 18 pages, version accepted to Physical Review
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