104 citations · 184 across the 6 of their papers we have counts for
6 papers
On-Shell Diagrams and Supergravity Amplitudes in Momentum Twistor Space
Connor Armstrong, Joseph A. Farrow, Arthur E. Lipstein
We derive an on-shell diagram recursion for tree-level scattering amplitudes in supergravity. The diagrams are evaluated in terms of Grassmannian integrals and mome…
Propagators, BCFW Recursion and New Scattering Equations at One Loop
Joseph A. Farrow, Yvonne Geyer, Arthur E. Lipstein +2
We investigate how loop-level propagators arise from tree level via a forward-limit procedure in two modern approaches to scattering amplitudes, namely the BCFW recursion relations…
Double copy structure of CFT correlators
Joseph A. Farrow, Arthur E. Lipstein, Paul McFadden
We consider the momentum-space 3-point correlators of currents, stress tensors and marginal scalar operators in general odd-dimensional conformal field theories. We show that the f…
A Monte Carlo Approach to the 4D Scattering Equations
Joseph A. Farrow
The scattering equation formalism is a general framework for calculation of amplitudes in theories of massless particles. We provide a detailed introduction to the 4D scattering eq…
New Worldsheet Formulae for Conformal Supergravity Amplitudes
Joseph A. Farrow, Arthur E. Lipstein
We use 4d ambitwistor string theory to derive new worldsheet formulae for tree-level conformal supergravity amplitudes supported on refined scattering equations. Unlike the worldsh…
From 4d Ambitwistor Strings to On Shell Diagrams and Back
Joseph A. Farrow, Arthur E. Lipstein
We investigate the relation between 4d ambitwistor string theory and on-shell diagrams for planar N=4 super-Yang-Mills and N=8 supergravity, and deduce several new results about th…