Tuesdays 10:30 - 11:30 | Fridays 11:30 - 12:30
Showing votes from 2019-12-17 11:30 to 2019-12-20 12:30 | Next meeting is Tuesday Apr 22nd, 10:30 am.
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.