Misc,

Classical Gravity from Loop Amplitudes

, , , and .
(2021)cite arxiv:2104.04510Comment: 42 pages. v3: version to appear in PRD.
DOI: 10.1103/PhysRevD.104.026009

Abstract

We describe an efficient method for extracting the parts of $D$-dimensional loop integrals that are needed to derive observables in classical general relativity from scattering amplitudes. Our approach simplifies the soft-region method of integration by judiciously combining terms before the final integrations. We demonstrate the method by computing the required integrals for black-hole scattering to the second Post-Minkowskian order in Einstein gravity coupled to scalars. We also confirm recent results at the third Post-Minkowskian order regarding universality and high-energy behavior of gravitational interactions in maximal supergravity.

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