Journal of High Energy Physics

, 2013:133

Matter in Hořava-Lifshitz gravity

Article

Abstract

We consider the role of matter in the non-projectable version of Hořava-Liftshitz gravity at both a classical and a quantum level. At the classical level, we construct general forms of matter Lagrangians consistent with the reduced symmetry group and demonstrate that they must be reduced to their relativistic form if they are to avoid sourcing the gravitational Stückelberg field. At the quantum level we consider one loop corrections to the propagator for a relativistic scalar minimally coupled to gravity at tree level. We find large corrections to the light cone at low energies arising from the strength of the coupling of the scalar graviton to matter. We also find evidence that higher order time derivatives may be generated, which is worrying if this is to be taken seriously as a UV complete theory.

Keywords

Models of Quantum Gravity Classical Theories of Gravity 

Copyright information

© SISSA, Trieste, Italy 2013

Authors and Affiliations

  1. 1.School of Physics and AstronomyUniversity of NottinghamNottinghamU.K

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