The Vector-Tensor nature of Bekenstein's relativistic theory of Modified Gravity
- 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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- Updated version: Notation cleaned up and some typos corrected-TGZ
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