New Formulae for Gravity Amplitudes: Parity Invariance and Soft Limits

Abstract

Cachazo and Skinner have recently conjectured a new formula for the complete tree-level S-matrix of N = 8 supergravity. The formula is an integral over the moduli space of rational curves in supertwistor space, and remarkably, manifests the full permutation symmetry of graviton scattering amplitudes. We check that the formula is parity invariance and reproduces the correct universal soft behaviour of graviton amplitudes.

15 pages, 1 figure

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Cited by in corpus (5)

• Gravity in Twistor Space and its Grassmannian Formulation
• Twistor Strings for N=8 Supergravity
• Notes on Conformal Soft Theorems and Recursion Relations in Gravity
• Resultants and Gravity Amplitudes
• Gravity Amplitudes from n-Space