Skip to search formSkip to main contentSkip to account menu
Theoretical Aspects of Massive Gravity
Massive gravity has seen a resurgence of interest due to recent progress which has overcome its traditional problems, yielding an avenue for addressing important open questions such as the…
View PDF on arXiv
Interacting spin-2 fields
A bstractWe construct consistent theories of multiple interacting spin-2 fields in arbitrary spacetime dimensions using a vielbein formulation. We show that these theories have the additional primary…
View on Springer
Screening long-range forces through local symmetry restoration.
TLDR
A screening mechanism that allows a scalar field to mediate a long-range force of gravitational strength in the cosmos while satisfying local tests of gravity and predicting deviations from general relativity in the solar system that are within reach of next-generation experiments, as well as astrophysically observable violations of the equivalence principle.
View on PubMed
Symmetron Cosmology
The symmetron is a scalar field associated with the dark sector whose coupling to matter depends on the ambient matter density. The symmetron is decoupled and screened in regions of high density,…
View PDF on arXiv
An infinite set of Ward identities for adiabatic modes in cosmology
We show that the correlation functions of any single-field cosmological model with constant growing-modes are constrained by an infinite number of novel consistency relations, which relate N+1-point…
View on IOP Publishing
Hidden symmetry of the Galileon
We show that there is a special choice of parameters for which the galileon theory is invariant under an enhanced shift symmetry whose non-linear part is quadratic in the coordinates. This symmetry…
View PDF on arXiv
Galileons as Wess-Zumino terms
A bstractWe show that the galileons can be thought of as Wess-Zumino terms for the spontaneous breaking of space-time symmetries. Wess-Zumino terms are terms which are not captured by the coset…
View on Springer
Conformal Symmetries of Adiabatic Modes in Cosmology
We remark on the existence of non-linearly realized conformal symmetries for scalar adiabatic perturbations in cosmology. These conformal symmetries are present for any cosmological background,…
View PDF on arXiv
Symmetries for Galileons and DBI scalars on curved space
We introduce a general class of four-dimensional effective field theories which include curved space Galileons and DBI theories possessing nonlinear shift-like symmetries. These effective theories…
View PDF on arXiv
Subluminal galilean genesis
A bstractWe put forward an improved version of the Galilean Genesis model that addresses the problem of superluminality. We demote the full conformal group to Poincaré symmetry and dilations,…
View on Springer
...
...
By clicking accept or continuing to use the site, you agree to the terms outlined in our Privacy Policy, Terms of Service, and Dataset License