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hep-th2009★ 292 cited
The Ultraviolet Behavior of N=8 Supergravity at Four Loops
Z. Bern, J. J. Carrasco, L. J. Dixon +2
We describe the construction of the complete four-loop four-particle amplitude of N=8 supergravity. The amplitude is ultraviolet finite, not only in four dimensions, but in five di…
hep-th2009★ 26 cited
Progress on Ultraviolet Finiteness of Supergravity
Z. Bern, J. J. M. Carrasco, H. Johansson
In this lecture we summarize recent calculations pointing to the possible ultraviolet finiteness of N = 8 supergravity in four dimensions. We outline the modern unitarity method, w…