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Strong Coupling and Bounds on the Graviton Mass in Massive Gravity
Clare Burrage, Nemanja Kaloper, Antonio Padilla
The theory of a single massive graviton has a cutoff much below its Planck scale, because the extra modes from the graviton multiplet involve higher derivative self-interactions, c…
Covariant multi-galileons and their generalisation
Antonio Padilla, Vishagan Sivanesan
We find a covariant completion of the flat-space multi-galileon theory, preserving second-order field equations. We then generalise this to arrive at an enlarged class of second or…
The cosmology of the Fab-Four
Edmund J. Copeland, Antonio Padilla, Paul M. Saffin
We have recently proposed a novel self tuning mechanism to alleviate the famous cosmological constant problem, based on the general scalar tensor theory proposed by Horndeski. The…
Boundary Terms and Junction Conditions for Generalized Scalar-Tensor Theories
Antonio Padilla, Vishagan Sivanesan
We compute the boundary terms and junction conditions for Horndeski's panoptic class of scalar-tensor theories, and write the bulk and boundary equations of motion in explicitly se…
Classical Duals, Legendre Transforms and the Vainshtein Mechanism
Antonio Padilla, Paul M. Saffin
We show how to generalize the classical duals found by Gabadadze {\it et al} to a very large class of self-interacting theories. This enables one to adopt a perturbative descriptio…
Cleaning up the cosmological constant
Ian Kimpton, Antonio Padilla
We present a novel idea for screening the vacuum energy contribution to the overall value of the cosmological constant, thereby enabling us to choose the bare value of the vacuum c…