{"work":{"id":"b28646f0-4e9e-425c-b64e-2d2b97a5cb89","openalex_id":null,"doi":null,"arxiv_id":"1502.02318","raw_key":null,"title":"New symmetries for the Gravitational S-matrix","authors":null,"authors_text":"M","year":2015,"venue":"hep-th","abstract":"In [15] we proposed a generalization of the BMS group G which is a semidirect product of supertranslations and smooth diffeomorphisms of the conformal sphere. Although an extension of BMS, G is a symmetry group of asymptotically flat space times. By taking G as a candidate symmetry group of the quantum gravity S-matrix, we argued that the Ward identities associated to the generators of Diff(S^2) were equivalent to the Cachazo-Strominger subleading soft graviton theorem. Our argument however was based on a proposed definition of the Diff(S^2) charges which we could not derive from first principles as G does not have a well defined action on the radiative phase space of gravity. Here we fill this gap and provide a first principles derivation of the Diff(S^2) charges. The result of this paper, in conjunction with the results of [4, 15] prove that the leading and subleading soft theorems are equivalent to the Ward identities associated to G.","external_url":"https://arxiv.org/abs/1502.02318","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-07-10T16:27:22.270024+00:00","pith_arxiv_id":"1502.02318","created_at":"2026-05-11T10:46:03.333175+00:00","updated_at":"2026-07-10T16:27:22.270024+00:00","title_quality_ok":false,"display_title":"New symmetries for the Gravitational S-matrix","render_title":"New symmetries for the Gravitational S-matrix"},"hub":{"state":{"tier_text":"hub","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":10,"external_cited_by_count":null},"tier":"hub","role_counts":[{"context_role":"background","n":1}],"polarity_counts":[{"context_polarity":"background","n":1}],"runs":{},"summary":{},"graph":{},"authors":[]}}