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.
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ArXiv ePrint: 1408.4179
On leave from Center for Field Theory and Particle Physics, Department of Physics, Fudan University, P.R China. (Yi-Jian Du)
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Du, YJ., Feng, B., Fu, CH. et al. Note on soft graviton theorem by KLT relation. J. High Energ. Phys. 2014, 90 (2014). https://doi.org/10.1007/JHEP11(2014)090
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DOI: https://doi.org/10.1007/JHEP11(2014)090