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Asymptotic symmetries and subleading soft graviton theorem in higher dimensions (2005.03439v4)
Published 7 May 2020 in hep-th and gr-qc
Abstract: We investigate the relation between the subleading soft graviton theorem and asymptotic symmetries in gravity in even dimensions $d=2+2m$ higher than four. After rewriting the subleading soft graviton theorem as a Ward identity, we argue that the charges of such identity generate Diff$(S{2m})$. In order to show that, we propose suitable commutation relation among certain components of the metric fields. As a result, all Diff$(S{2m})$ transformations are symmetries of gravitational scattering.