Einstein-Yang-Mills Scattering Amplitudes From Scattering Equations
Abstract
We present the building blocks that can be combined to produce tree-level S-matrix elements of a variety of theories with various spins mixed in arbitrary dimensions. The new formulas for the scattering of massless particles are given by integrals over the positions of points on a sphere restricted to satisfy the scattering equations. As applications, we obtain all single-trace amplitudes in Einstein--Yang--Mills (EYM) theory, and generalizations to include scalars. Also in EYM but extended by a B-field and a dilaton, we present all double-trace gluon amplitudes. The building blocks are made of Pfaffians and Parke--Taylor-like factors of subsets of particle labels.
Cite
@article{arxiv.1409.8256,
title = {Einstein-Yang-Mills Scattering Amplitudes From Scattering Equations},
author = {Freddy Cachazo and Song He and Ellis Ye Yuan},
journal= {arXiv preprint arXiv:1409.8256},
year = {2015}
}
Comments
18 pages. References and a new section on double-trace gluon amplitudes added in v2