211 citations · 500 across the 5 of their papers we have counts for
6 papers · 1 filter
Resolving the vDVZ and Strong Coupling Problems in Massive Gravity and Bigravity
Gregory Gabadadze, Daniel Older, David Pirtskhalava
As is well known, both massive gravity and bigravity exhibit the linear van Dam-Veltman-Zakharov (vDVZ) discontinuity that is cured classically by the nonlinear Vainshtein mechanis…
Boundary Terms for Massive General Relativity
Gregory Gabadadze, David Pirtskhalava
It is well-known that the presence of a spacetime boundary requires the conventional Einstein-Hilbert (EH) action to be supplemented by the Gibbons-Hawking (GH) boundary term in or…
Gaugid inflation
Federico Piazza, David Pirtskhalava, Riccardo Rattazzi +1
The spectrum of primordial gravitational waves is one of the most robust inflationary observables, often thought of as a direct probe of the energy scale of inflation. We present a…
Non-Renormalization and Naturalness in a Class of Scalar-Tensor Theories
Claudia de Rham, Gregory Gabadadze, Lavinia Heisenberg +1
We study the renormalization of some dimension-4, 7 and 10 operators in a class of nonlinear scalar-tensor theories. These theories are invariant under: (a) linear diffeomorphisms…
A Covariant Master Theory for Novel Galilean Invariant Models and Massive Gravity
Gregory Gabadadze, Kurt Hinterbichler, Justin Khoury +2
Coupling the galileons to a curved background has been a tradeoff between maintaining second order equations of motion, maintaining the galilean shift symmetries, and allowing the…
Cosmic Acceleration and the Helicity-0 Graviton
Claudia de Rham, Gregory Gabadadze, Lavinia Heisenberg +1
We explore cosmology in the decoupling limit of a non-linear covariant extension of Fierz-Pauli massive gravity obtained recently in arXiv:1007.0443. In this limit the theory is a…