On the ambiguities in the effective action in Lorentz-violating gravity
High Energy Physics - Theory
2008-11-26 v2
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.
Cite
@article{arxiv.0805.4409,
title = {On the ambiguities in the effective action in Lorentz-violating gravity},
author = {M. Gomes and T. Mariz and J. R. Nascimento and E. Passos and A. Yu. Petrov and A. J. da Silva},
journal= {arXiv preprint arXiv:0805.4409},
year = {2008}
}
Comments
9 pages, minor corrections