2010/04/30 by Zvi Bern, John Joseph M. Carrasco, Henrik Johansson · 4 citations
Physics and Astronomy · #hep-th
paper · pdf · doi:10.1103/physrevlett.105.061602
published as Phys.Rev.Lett.105:061602,2010 · 5 pages, 2 figures; v2, minor clarifications and references added
arxiv created 2010/07/30 · arxiv updated 2014/11/20
In a previous paper we observed that (classical) tree-level gauge theory amplitudes can be rearranged to display a duality between color and kinematics. Once this is imposed, gravity amplitudes are obtained using two copies of gauge-theory diagram numerators. Here we conjecture that this duality persists to all quantum loop orders and can thus be used to obtain multiloop gravity amplitudes easily from gauge-theory ones. As a nontrivial test, we show that the three-loop four-point amplitude of N = 4 super-Yang-Mills theory can be arranged into a form satisfying the duality, and by taking double copies of the diagram numerators we obtain the corresponding amplitude of N = 8 supergravity. We also remark on a non-supersymmetric two-loop test based on pure Yang-Mills theory resulting in gravity coupled to an anti-symmetric tensor and dilaton.