On the ambiguities in the effective action in Lorentz-violating gravity
arXiv:0805.4409 · doi:10.1103/PhysRevD.78.025029
Abstract
We investigate the occurrence of ambiguities for Lorentz-violating gravitational Chern-Simons term. It turns out that this term is accompanied by a coefficient depending on an undetermined parameter, due to an arbitrariness in the choice of the conserved current.
9 pages, minor corrections
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