Perturbative Gravity and Twistor Space

TL;DR

This paper discusses advances in calculating gravity amplitudes using twistor space techniques, extending methods from gauge theories, and supports the hypothesis that N=8 supergravity amplitudes can be simplified to scalar box integrals.

Contribution

It extends gauge theory computational methods to gravity and provides evidence for the no-triangle hypothesis in N=8 supergravity.

Findings

Supports the no-triangle hypothesis for N=8 supergravity.

Shows that gravity amplitudes can be analyzed using twistor space methods.

Extends gauge theory amplitude techniques to gravitational theories.

Abstract

The recent progress in computing gauge theory amplitudes can be extended, in many cases, to theories incorporating gravity. This has improved our understanding of the perturbative expansion of N=8 supergravity supporting the ``no-triangle hypothesis'' that N=8 one-loop amplitudes may be expressed in terms of scalar box integral functions.