| Literature DB >> 19792710 |
Z Bern1, J J M Carrasco, L J Dixon, H Johansson, R Roiban.
Abstract
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 dimensions as well. The observed extra cancellations provide additional nontrivial evidence that N=8 supergravity in four dimensions may be ultraviolet finite to all orders of perturbation theory.Year: 2009 PMID： 19792710 DOI： 10.1103/PhysRevLett.103.081301
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161