

Author: Park Mu-In
Publisher: IOP Publishing
ISSN: 0264-9381
Source: Classical and Quantum Gravity, Vol.28, Iss.1, 2011-01, pp. : 15004-15010
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Abstract
Recently Hořava proposed a renormalizable gravity theory with higher derivatives by abandoning the Lorenz invariance in UV. But there have been confusions regarding an extra scalar graviton mode and the consistency of the Hořava model. I reconsider these problems and show that, in the Minkowski vacuum background, the scalar graviton mode can be the consistency decoupled from the usual tensor graviton modes, by imposing the (local) Hamiltonian as well as the momentum constraints.
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