On tree amplitudes of supersymmetric Einstein-Yang-Mills theory

Timothy Adamo, Eduardo Casali, Kai A. Roehrig, David Skinner

Research output: Contribution to journalArticlepeer-review


We present a new formula for all single trace tree amplitudes in four dimensional super Yang-Mills coupled to Einstein supergravity. Like the Cachazo-He-Yuan formula, our expression is supported on solutions of the scattering equations, but with momenta written in terms of spinor helicity variables. Supersymmetry and parity are both manifest. In the pure gravity and pure Yang-Mills sectors, it reduces to the known twistor-string formulae. We show that the formula behaves correctly under factorization and sketch how these amplitudes may be obtained from a four-dimensional (ambi)twistor string.
Original languageEnglish
Pages (from-to)1-14
Number of pages14
Journal Journal of High Energy Physics
Issue number12
Publication statusPublished - 29 Dec 2015

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