Abstract
We generalize the scattering equations to include both massless and massive particles. We construct an expression for the tree-level n-point amplitude with n − 2 gluons or gravitons and a pair of massive scalars in arbitrary spacetime dimension as a sum over the (n − 3)! solutions of the scattering equations, à la Cachazo, He, and Yuan. We derive the BCJ relations obeyed by these massive amplitudes.
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ArXiv ePrint: 1407.7836
Research supported in part by the National Science Foundation under Grant No. PHY10-67961.
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Naculich, S.G. Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles. J. High Energ. Phys. 2014, 29 (2014). https://doi.org/10.1007/JHEP09(2014)029
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DOI: https://doi.org/10.1007/JHEP09(2014)029