N >= 4 Supergravity Amplitudes from Gauge Theory at Two Loops

Details N >= 4 Supergravity Amplitudes from Gauge Theory at Two Loops N >= 4 Supergravity Amplitudes from Gauge Theory at Two Loops

2011-10-06

arxiv.org/abs/1110.1132v2

Physics

High Energy Physics

High Energy Physics - Theory

31 pages, 2 figures, 1 table. v2: minor corrections, and references added

Scientific paper

We present the full two-loop four-graviton amplitudes in N=4,5,6 supergravity. These results were obtained using the double-copy structure of gravity, which follows from the recently conjectured color-kinematics duality in gauge theory. The two-loop four-gluon scattering amplitudes in N=0,1,2 supersymmetric gauge theory are a second essential ingredient. The gravity amplitudes have the expected infrared behavior: the two-loop divergences are given in terms of the squares of the corresponding one-loop amplitudes. The finite remainders are presented in a compact form. The finite remainder for N=8 supergravity is also presented, in a form that utilizes a pure function with a very simple symbol.

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