{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:JKZYPYKWYQNUZR7F76JR7VPJX6","short_pith_number":"pith:JKZYPYKW","canonical_record":{"source":{"id":"1811.06024","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-14T19:25:27Z","cross_cats_sorted":[],"title_canon_sha256":"2b9b2f8a6b48421c897c29ceaf8265370103744b9c25e3d22b673a9bed42cfff","abstract_canon_sha256":"dc1630e96b6a5752f1ed1fb3b72c4c80df508f156aa4cae4cb4caf36b7131afa"},"schema_version":"1.0"},"canonical_sha256":"4ab387e156c41b4cc7e5ff931fd5e9bfac52058edf2a30a37087839e80cad9fa","source":{"kind":"arxiv","id":"1811.06024","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06024","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06024v2","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06024","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"JKZYPYKWYQNU","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JKZYPYKWYQNUZR7F","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JKZYPYKW","created_at":"2026-05-18T12:32:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:JKZYPYKWYQNUZR7F76JR7VPJX6","target":"record","payload":{"canonical_record":{"source":{"id":"1811.06024","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-14T19:25:27Z","cross_cats_sorted":[],"title_canon_sha256":"2b9b2f8a6b48421c897c29ceaf8265370103744b9c25e3d22b673a9bed42cfff","abstract_canon_sha256":"dc1630e96b6a5752f1ed1fb3b72c4c80df508f156aa4cae4cb4caf36b7131afa"},"schema_version":"1.0"},"canonical_sha256":"4ab387e156c41b4cc7e5ff931fd5e9bfac52058edf2a30a37087839e80cad9fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:52:33.601530Z","signature_b64":"8+HH7ZdRg3jUq6q48afVT4YgPh/0LJuMfUkVCdgbY0U+HsQiL3B/UNiC5xZkUsVS73R1k5+poH+BFA5mci/ECQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4ab387e156c41b4cc7e5ff931fd5e9bfac52058edf2a30a37087839e80cad9fa","last_reissued_at":"2026-05-17T23:52:33.600925Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:52:33.600925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1811.06024","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5V7+yRB6QxNQYfnvBMLeD1kJWvoKHrF1D256AaZT9yrjrgeF25FJQz+TrJgo8GTIGtJOBo+iyRfyYiwDwiu1BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:36:25.130959Z"},"content_sha256":"2407056f0e54b2c0e3a3a9e3e7df9e1941bc7b87839536ad7a85fcf67960c570","schema_version":"1.0","event_id":"sha256:2407056f0e54b2c0e3a3a9e3e7df9e1941bc7b87839536ad7a85fcf67960c570"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:JKZYPYKWYQNUZR7F76JR7VPJX6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"New Factorization Relations for Non-Linear Sigma Model Amplitudes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-th","authors_text":"Andreas Helset, Humberto Gomez, N. E. J. Bjerrum-Bohr","submitted_at":"2018-11-14T19:25:27Z","abstract_excerpt":"We obtain novel factorization identities for non-linear sigma model amplitudes using a new integrand in the CHY double-cover prescription. We find that it is possible write very compact relations using only longitudinal degrees of freedom. We discuss implications for on-shell recursion."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06024","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:52:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3bBdFPLZoGbDZ/cYpt0ZwvEUclRBrUWYsb04o67h0rHQZDN4qCYehOW7oUAfQUiS+vGqGuqmaBvNu6rg3en6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-06T23:36:25.131557Z"},"content_sha256":"e147af49593ec7a557f28936c23a220dd492b1e63d66dcfcbaa96b499fa9986d","schema_version":"1.0","event_id":"sha256:e147af49593ec7a557f28936c23a220dd492b1e63d66dcfcbaa96b499fa9986d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/bundle.json","state_url":"https://pith.science/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-06T23:36:25Z","links":{"resolver":"https://pith.science/pith/JKZYPYKWYQNUZR7F76JR7VPJX6","bundle":"https://pith.science/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/bundle.json","state":"https://pith.science/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JKZYPYKWYQNUZR7F76JR7VPJX6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:JKZYPYKWYQNUZR7F76JR7VPJX6","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"dc1630e96b6a5752f1ed1fb3b72c4c80df508f156aa4cae4cb4caf36b7131afa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-14T19:25:27Z","title_canon_sha256":"2b9b2f8a6b48421c897c29ceaf8265370103744b9c25e3d22b673a9bed42cfff"},"schema_version":"1.0","source":{"id":"1811.06024","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1811.06024","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"arxiv_version","alias_value":"1811.06024v2","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.06024","created_at":"2026-05-17T23:52:33Z"},{"alias_kind":"pith_short_12","alias_value":"JKZYPYKWYQNU","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_16","alias_value":"JKZYPYKWYQNUZR7F","created_at":"2026-05-18T12:32:31Z"},{"alias_kind":"pith_short_8","alias_value":"JKZYPYKW","created_at":"2026-05-18T12:32:31Z"}],"graph_snapshots":[{"event_id":"sha256:e147af49593ec7a557f28936c23a220dd492b1e63d66dcfcbaa96b499fa9986d","target":"graph","created_at":"2026-05-17T23:52:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We obtain novel factorization identities for non-linear sigma model amplitudes using a new integrand in the CHY double-cover prescription. We find that it is possible write very compact relations using only longitudinal degrees of freedom. We discuss implications for on-shell recursion.","authors_text":"Andreas Helset, Humberto Gomez, N. E. J. Bjerrum-Bohr","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-14T19:25:27Z","title":"New Factorization Relations for Non-Linear Sigma Model Amplitudes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.06024","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2407056f0e54b2c0e3a3a9e3e7df9e1941bc7b87839536ad7a85fcf67960c570","target":"record","created_at":"2026-05-17T23:52:33Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"dc1630e96b6a5752f1ed1fb3b72c4c80df508f156aa4cae4cb4caf36b7131afa","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-11-14T19:25:27Z","title_canon_sha256":"2b9b2f8a6b48421c897c29ceaf8265370103744b9c25e3d22b673a9bed42cfff"},"schema_version":"1.0","source":{"id":"1811.06024","kind":"arxiv","version":2}},"canonical_sha256":"4ab387e156c41b4cc7e5ff931fd5e9bfac52058edf2a30a37087839e80cad9fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4ab387e156c41b4cc7e5ff931fd5e9bfac52058edf2a30a37087839e80cad9fa","first_computed_at":"2026-05-17T23:52:33.600925Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:52:33.600925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8+HH7ZdRg3jUq6q48afVT4YgPh/0LJuMfUkVCdgbY0U+HsQiL3B/UNiC5xZkUsVS73R1k5+poH+BFA5mci/ECQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:52:33.601530Z","signed_message":"canonical_sha256_bytes"},"source_id":"1811.06024","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2407056f0e54b2c0e3a3a9e3e7df9e1941bc7b87839536ad7a85fcf67960c570","sha256:e147af49593ec7a557f28936c23a220dd492b1e63d66dcfcbaa96b499fa9986d"],"state_sha256":"5ccf5276a9a03062a2058bf54d315a953fbb666f7e7820e9368f06b52b555b12"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GkXl5Q6eusf2iPqL1c0GBjpbtepcqGh9pYPh6zvukDjWAlH8qN6AtjBWz5rwT4HxGImkv7U5h2PBb2/x1iFuCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-06T23:36:25.135107Z","bundle_sha256":"9bd3f04e3c7073f4edfd9a510e8fbaa1f4489361d449c5dc4af53f0d72921cd8"}}