Supertranslations in higher dimensions revisited

Abstract

In this paper, we revisit the question of identifying the soft graviton theorem in higher (even) dimensions with Ward identities associated with asymptotic symmetries. Building on the prior work of [Ann. Math. Sci. Appl. 2, 69 (2017)2380-288X10.4310/AMSA.2017.v2.n1.a2], we compute, from first principles, the (asymptotic) charges associated to supertranslation symmetry in higher even dimensions and show that (i) these charges are nontrivial and finite and (ii) the corresponding Ward identities are indeed the soft graviton theorems.