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arXiv · 1407.7836

Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles

Stephen G. Naculich
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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, a la Cachazo, He, and Yuan. We derive the BCJ relations obeyed by these massive amplitudes.

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Stephen G. Naculich. 2014-07-29. Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles. https://doi.org/10.1007/jhep09(2014)029

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