arXiv:1408.4179·v1·High Energy Physics — Theory
Note on Soft Graviton theorem by KLT Relation
Yi-Jian Du🇸🇪 · Bo Feng🇨🇳 · Chih-Hao Fu🇨🇳 · Yihong Wang🇺🇸
Abstract
Recently, new soft graviton theorem proposed by Cachazo and Strominger has inspired a lot of works. In this note, we use the KLT-formula to investigate the theorem. We have shown how the soft behavior of color ordered Yang-Mills amplitudes can be combined with KLT relation to give the soft behavior of gravity amplitudes. As a byproduct, we find two nontrivial identities of the KLT momentum kernel must hold.
Comments: 25 pages