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arXiv · 1912.09101

Unitarity and Different Phases of the Extended New Massive Gravity

Giorgi Tukhashvili
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Abstract

We study the New Massive Gravity extended by the curvature cubed invariant and the Cosmological Constant using the tree-level scattering amplitudes on a maximally symmetric space-time. We identify the parameter space, consisting of the ratio between C.C. and graviton mass squared and the relative coupling strength between curvature squared and cubed invariants, for which the massive spin-2 is a ghost. Different phases of this model are also discussed.

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Giorgi Tukhashvili. 2020-06-14. Unitarity and Different Phases of the Extended New Massive Gravity. https://doi.org/10.1103/physrevd.101.124018

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