Scalar-Graviton Amplitudes
arXiv:1908.09755 · doi:10.1007/JHEP11(2019)148
Abstract
Using the CHY-formalism and its extension to a double cover we provide covariant expressions for tree-level amplitudes with two massive scalar legs and an arbitrary number of gravitons in D dimensions. Using unitarity methods, such amplitudes are needed inputs for the computation of post-Newtonian and post-Minkowskian expansions in classical general relativity.
25 pages