MHV-Vertices for Gravity Amplitudes
arXiv:hep-th/0509016 · doi:10.1088/1126-6708/2006/01/009
Abstract
We obtain a CSW-style formalism for calculating graviton scattering amplitudes and prove its validity through the use of a special type of BCFW-like parameter shift. The procedure is illustrated with explicit examples.
21 pages, minor typos corrected, proof added in section 4