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Positivity Constraints on Interacting Pseudo-Linear Spin-2 Fields
Lasma Alberte, Claudia de Rham, Arshia Momeni +2
We explore the effective field theory for single and multiple interacting pseudo-linear spin-2 fields. By applying forward limit positivity bounds, we show that among the parameter…
Deformations, Massive Gravity and Non-Critical Strings
Andrew J. Tolley
The deformation of a 2 dimensional field theory living on a curved spacetime is equivalent to coupling the undeformed field theory to 2 dimensional `ghost-free' massive…
Positivity Constraints on Interacting Spin-2 Fields
Lasma Alberte, Claudia de Rham, Arshia Momeni +2
The consistency of the EFT of two interacting spin-2 fields is checked by applying forward limit positivity bounds on the scattering amplitudes to exclude the region of parameter s…
EFT of Interacting Spin-2 Fields
Lasma Alberte, Claudia de Rham, Arshia Momeni +2
We consider the effective field theory of multiple interacting massive spin-2 fields. We focus on the case where the interactions are chosen so that the cutoff is the highest possi…
The Speed of Gravity
Claudia de Rham, Andrew J. Tolley
Within the standard effective field theory of General Relativity, we show that the speed of gravitational waves deviates, ever so slightly, from luminality on cosmological and othe…
Primordial Non-Gaussianity
P. Daniel Meerburg, Daniel Green, Muntazir Abidi +175
Our current understanding of the Universe is established through the pristine measurements of structure in the cosmic microwave background (CMB) and the distribution and shapes of…