Supertranslations from Scattering Amplitudes
High Energy Physics - Theory
2024-12-19 v2 General Relativity and Quantum Cosmology
Abstract
On-shell methods have found a new application to local observables such as asymptotic radiation fields and gravitational waveforms. While these observables are invariant under small gauge transformations, they are known to depend on a choice of asymptotic gauge; in gravity on asymptotically Minkowski spacetimes, this is a choice of BMS frame. In this letter, we provide a method for capturing these supertranslations, to all orders in perturbation theory, using the on-shell framework of scattering amplitudes.
Keywords
Cite
@article{arxiv.2408.15961,
title = {Supertranslations from Scattering Amplitudes},
author = {Asaad Elkhidir and Donal O'Connell and Radu Roiban},
journal= {arXiv preprint arXiv:2408.15961},
year = {2024}
}
Comments
9 pages. v2: improved discussion of the hard charge