Double-Copy Supertranslations
Abstract
In the framework of the convolutional double copy, we investigate the asymptotic symmetries of the gravitational multiplet stemming from the residual symmetries of its single-copy constituents at null infinity. We show that the asymptotic symmetries of Maxwell fields in D=4 imply ``double-copy supertranslations", i.e. BMS supertranslations and two-form asymptotic symmetries, together with the existence of infinitely many conserved charges involving the double-copy scalar. With the vector fields in Lorenz gauge, the double-copy parameters display a radial expansion involving logarithmic subleading terms, essential for the corresponding charges to be nonvanishing.
Cite
@article{arxiv.2402.11595,
title = {Double-Copy Supertranslations},
author = {Pietro Ferrero and Dario Francia and Carlo Heissenberg and Matteo Romoli},
journal= {arXiv preprint arXiv:2402.11595},
year = {2024}
}
Comments
21 pages, LaTeX. Extended version; clarifications and references added, typos and notation fixed