{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:YMA4H74GM53WJEISOKDXRA5RZU","short_pith_number":"pith:YMA4H74G","schema_version":"1.0","canonical_sha256":"c301c3ff86677764911272877883b1cd0ca71db7b671d8ba7e41f7ba2fb16b18","source":{"kind":"arxiv","id":"1406.1462","version":1},"attestation_state":"computed","paper":{"title":"Ambitwistor strings at null infinity and subleading soft limits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Arthur E. Lipstein, Lionel Mason, Yvonne Geyer","submitted_at":"2014-06-05T18:10:23Z","abstract_excerpt":"The relationships between extended BMS symmetries at null infinity and Weinberg's soft theorems for gravitons and photons together with their subleading generalizations are developed using ambitwistor string theory. Ambitwistor space is the phase space of complex null geodesics in complexified space-time. We show how it can be canonically identified with the cotangent bundle of null infinity. BMS symmetries of null infinity lift to give a hamiltonian action on ambitwistor space, both in general dimension and in its twistorial 4-dimensional representation. General vertex operators arise from ha"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1406.1462","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-06-05T18:10:23Z","cross_cats_sorted":[],"title_canon_sha256":"7191469f03da959b8aa4cd16124ce1637d7b37c1b67d5512c6f5871013b49c99","abstract_canon_sha256":"132eaa5d4bc56142abfe012c874e88bf7fdbec3f89074d34e57b8bbc07b66e64"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:43:01.785723Z","signature_b64":"jVb1q67YXNW3V5DLIwh0fOji/iNtzj6cNzerWL5/iBly3LGJRDPypZsctuV4PLSKJHVjx1weAPhi/qHcWGYjAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c301c3ff86677764911272877883b1cd0ca71db7b671d8ba7e41f7ba2fb16b18","last_reissued_at":"2026-05-18T01:43:01.785372Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:43:01.785372Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ambitwistor strings at null infinity and subleading soft limits","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Arthur E. Lipstein, Lionel Mason, Yvonne Geyer","submitted_at":"2014-06-05T18:10:23Z","abstract_excerpt":"The relationships between extended BMS symmetries at null infinity and Weinberg's soft theorems for gravitons and photons together with their subleading generalizations are developed using ambitwistor string theory. Ambitwistor space is the phase space of complex null geodesics in complexified space-time. We show how it can be canonically identified with the cotangent bundle of null infinity. BMS symmetries of null infinity lift to give a hamiltonian action on ambitwistor space, both in general dimension and in its twistorial 4-dimensional representation. General vertex operators arise from ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.1462","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"1406.1462","created_at":"2026-05-18T01:43:01.785429+00:00"},{"alias_kind":"arxiv_version","alias_value":"1406.1462v1","created_at":"2026-05-18T01:43:01.785429+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1406.1462","created_at":"2026-05-18T01:43:01.785429+00:00"},{"alias_kind":"pith_short_12","alias_value":"YMA4H74GM53W","created_at":"2026-05-18T12:28:57.508820+00:00"},{"alias_kind":"pith_short_16","alias_value":"YMA4H74GM53WJEIS","created_at":"2026-05-18T12:28:57.508820+00:00"},{"alias_kind":"pith_short_8","alias_value":"YMA4H74G","created_at":"2026-05-18T12:28:57.508820+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU","json":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU.json","graph_json":"https://pith.science/api/pith-number/YMA4H74GM53WJEISOKDXRA5RZU/graph.json","events_json":"https://pith.science/api/pith-number/YMA4H74GM53WJEISOKDXRA5RZU/events.json","paper":"https://pith.science/paper/YMA4H74G"},"agent_actions":{"view_html":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU","download_json":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU.json","view_paper":"https://pith.science/paper/YMA4H74G","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1406.1462&json=true","fetch_graph":"https://pith.science/api/pith-number/YMA4H74GM53WJEISOKDXRA5RZU/graph.json","fetch_events":"https://pith.science/api/pith-number/YMA4H74GM53WJEISOKDXRA5RZU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU/action/storage_attestation","attest_author":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU/action/author_attestation","sign_citation":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU/action/citation_signature","submit_replication":"https://pith.science/pith/YMA4H74GM53WJEISOKDXRA5RZU/action/replication_record"}},"created_at":"2026-05-18T01:43:01.785429+00:00","updated_at":"2026-05-18T01:43:01.785429+00:00"}