Phenomenologically viable Lorentz-violating quantum gravity

Details Phenomenologically viable Lorentz-violating quantum gravity Phenomenologically viable Lorentz-violating quantum gravity

2009-04-28

arxiv.org/abs/0904.4464v3

Phys.Rev.Lett.102:251601,2009

Physics

High Energy Physics

High Energy Physics - Theory

4 pages; revtex4; V2: 2 references added; minor edits; no physics changes; V3: references added; minor edits; no physics chang

Scientific paper

10.1103/PhysRevLett.102.251601

Horava's "Lifschitz point gravity" has many desirable features, but in its original incarnation one is forced to accept a non-zero cosmological constant of the wrong sign to be compatible with observation. We develop an extension of Horava's model that abandons "detailed balance", and in 3+1 dimensions exhibit all five marginal (renormalizable) and four relevant (super-renormalizable) operators, as determined by power counting. We also consider the classical limit of this theory, evaluate the Hamiltonian and super-momentum constraints, and extract the classical equations of motion in a form similar to the ADM formulation of general relativity. This puts the model in a framework amenable to developing detailed precision tests.

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