6 papers
Constraints on a Massive Double-Copy and Applications to Massive Gravity
Laura A. Johnson, Callum R. T. Jones, Shruti Paranjape
We propose and study a BCJ double-copy of massive particles, showing that it is equivalent to a KLT formula with a kernel given by the inverse of a matrix of massive bi-adjoint sca…
Amplitudes and 4D Gauss-Bonnet Theory
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson
It has recently been argued that there may be a nontrivial four-dimensional limit of the higher-dimensional Gauss--Bonnet and Lovelock interactions and that this might provide a lo…
Matter Couplings and Equivalence Principles for Soft Scalars
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson +2
Scalar effective field theories with enhanced soft limits behave in many ways like gauge theories and gravity. In particular, symmetries fix the structure of interactions and the t…
Shift-Symmetric Spin-1 Theories
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson +1
We study interacting massive spin-1 theories in de Sitter (dS) and anti-de Sitter (AdS) space that possess shift symmetries parametrized by (A)dS Killing vectors. We show how they…
On the (A)dS Decoupling Limits of Massive Gravity
Claudia de Rham, Kurt Hinterbichler, Laura A. Johnson
We consider various decoupling limits of ghost-free massive gravity on (A)dS. The first is a decoupling limit on AdS space where the mass goes to zero while the AdS radius is held…
Pseudo-Linear Spin-2 Interactions
James Bonifacio, Kurt Hinterbichler, Laura A. Johnson
We show how the pseudo-linear interactions for spin-2 particles can be straightforwardly extended to include multiple massive and massless fields without introducing ghosts. When m…