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Title:
Warped massive gravity
Speaker:
Abstract:
Pure massive gravity is strongly coupled at a certain low scale. I show that the theory can be embedded into another one, with new light degrees of freedom, to increase the strong scale to a significantly larger value. An example of the embedding theory that will be discussed is 5D AdS massive gravity, with a large cosmological constant. In this example the 4D strong scale can be increased by 19 orders of magnitude. The linear approximation of the obtained theory has no vDVZ discontinuity. Holographic duality suggests that the strong scale of the 4D massive gravity can be increased by coupling it to a 4D non-local CFT, endowed with a UV cutoff.
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