A recursion relation for gravity amplitudes
High Energy Physics - Theory
2008-11-26 v2 General Relativity and Quantum Cosmology
Abstract
Britto, Cachazo and Feng have recently derived a recursion relation for tree-level scattering amplitudes in Yang-Mills. This relation has a bilinear structure inherited from factorisation on multi-particle poles of the scattering amplitudes - a rather generic feature of field theory. Motivated by this, we propose a new recursion relation for scattering amplitudes of gravitons at tree level. Using this recursion relation, we derive a new general formula for the MHV tree-level scattering amplitude for n gravitons. Finally, we comment on the existence of recursion relations in general field theories.
Keywords
Cite
@article{arxiv.hep-th/0502146,
title = {A recursion relation for gravity amplitudes},
author = {James Bedford and Andreas Brandhuber and Bill Spence and Gabriele Travaglini},
journal= {arXiv preprint arXiv:hep-th/0502146},
year = {2008}
}
Comments
17 pages, 3 figures. v2: references added, typos corrected. Published version to appear in Nuclear Physics B