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Galileon Radiation from Binary Systems
Claudia de Rham, Andrew Matas, Andrew J. Tolley
We calculate the power emitted in scalar modes for a binary systems, including binary pulsars, with a conformal coupling to the most general Galileon effective field theory by cons…
Low-Energy Effective Field Theory for Chromo-Natural Inflation
Emanuela Dimastrogiovanni, Matteo Fasiello, Andrew J. Tolley
Chromo-natural inflation is a novel model of inflation which relies on the existence of non-abelian gauge fields interacting with an axion. In its simplest realization, an SU(2) ga…
Effective field theory and non-Gaussianity from general inflationary states
Nishant Agarwal, R. Holman, Andrew J. Tolley +1
We study the effects of non-trivial initial quantum states for inflationary fluctuations within the context of the effective field theory for inflation constructed by Cheung et al.…
Brane Stabilization and Regionality of Extra Dimensions
David M. Jacobs, Glenn D. Starkman, Andrew J. Tolley
Extra dimensions are a common feature of beyond the Standard Model physics. In a braneworld scenario, local physics on the brane can depend strongly on the brane's location within…
Higher derivative theories with constraints : Exorcising Ostrogradski's Ghost
Tai-jun Chen, Matteo Fasiello, Eugene A. Lim +1
We prove that the linear instability in a non-degenerate higher derivative theory, the Ostrogradski instability, can only be removed by the addition of constraints if the original…
Vainshtein Mechanism in Binary Pulsars
Claudia de Rham, Andrew J. Tolley, Daniel H. Wesley
We compute the scalar gravitational radiation from a binary pulsar system in the simplest model that exhibits the Vainshtein mechanism. The mechanism is successful in screening the…