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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…
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…
Equivalence Principle on Cosmological Backgrounds in Scalar-Tensor Theories
Lasma Alberte
We study the extent up to which the equivalence principle is obeyed in models of modified gravity and dark energy involving a single scalar degree of freedom. We focus on the effec…