48 citations · 82 across the 3 of their papers we have counts for
9 papers
The SAGEX Review on Scattering Amplitudes, Chapter 6: Ambitwistor Strings and Amplitudes from the Worldsheet
Yvonne Geyer, Lionel Mason
Starting with Witten's twistor string, chiral string theories have emerged that describe field theory amplitudes without the towers of massive states of conventional strings. These…
Ambitwistor Strings in Six and Five Dimensions
Yvonne Geyer, Lionel Mason, David Skinner
Ambitwistor strings are chiral (holomorphic) strings whose target is the space of complex null geodesics, ambitwistor space. We introduce twistor representations of ambitwistor spa…
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…
Recursion and worldsheet formulae for 6d superamplitudes
Giulia Albonico, Yvonne Geyer, Lionel Mason
Recently two of the authors presented a spinorial extension of the scattering equations, the `polarized scattering equations' that incorporates spinor polarization data. These led…
Two-Loop Scattering Amplitudes: Double-Forward Limit and Colour-Kinematics Duality
Yvonne Geyer, Ricardo Monteiro, Ricardo Stark-Muchão
We propose new formulae for the two-loop n-point D-dimensional integrands of scattering amplitudes in Yang-Mills theory and gravity. The loop integrands are written as a double-for…
Supersymmetric S-matrices from the worldsheet in 10 and 11d
Yvonne Geyer, Lionel Mason
We obtain compact formulae for tree super-amplitudes for 10 and 11-dimensional supergravity and 10-dimensional supersymmetric Yang-Mills and Born-Infeld. These are based on the \em…