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arXiv · 2408.15961

Supertranslations from Scattering Amplitudes

Asaad Elkhidir·Donal O'Connell·Radu Roiban
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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.

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Asaad Elkhidir, Donal O'Connell, Radu Roiban. 2024-08-28. Supertranslations from Scattering Amplitudes. https://arxiv.org/abs/2408.15961

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