The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity

Details The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity

2006-06-09

arxiv.org/abs/gr-qc/0606039v1

Phys.Rev. D74 (2006) 044037

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

submitted to PRD (Rapid Communications)

Scientific paper

10.1103/PhysRevD.74.044037

Bekenstein's theory of relativistic gravity is conventionally written as a bi-metric theory. The two metrics are related by a disformal transformation defined by a dynamical vector field and a scalar field. In this comment we show that the theory can be re-written as Vector-Tensor theory akin to Einstein-Aether theories with non-canonical kinetic terms. We discuss some of the implications of this equivalence.

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