{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:UBNRCZ6XT2DTJQKAXWLU3QURKV","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":"435d5075069910fd1f4e796dd5cab6fac612f10b4e95249d234957ba9e8ee672","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1994-04-12T14:22:17Z","title_canon_sha256":"df4b2a311ab86646f76aecbc0565eb635350322953fb5b09fa3919a958d4a378"},"schema_version":"1.0","source":{"id":"nucl-th/9404013","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9404013","created_at":"2026-07-04T15:58:23Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9404013v1","created_at":"2026-07-04T15:58:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9404013","created_at":"2026-07-04T15:58:23Z"},{"alias_kind":"pith_short_12","alias_value":"UBNRCZ6XT2DT","created_at":"2026-07-04T15:58:23Z"},{"alias_kind":"pith_short_16","alias_value":"UBNRCZ6XT2DTJQKA","created_at":"2026-07-04T15:58:23Z"},{"alias_kind":"pith_short_8","alias_value":"UBNRCZ6X","created_at":"2026-07-04T15:58:23Z"}],"graph_snapshots":[{"event_id":"sha256:8551f22aa886336ea51dcbc130ae50cbcdfb92cfb5c0d53e826e818e1d18ad17","target":"graph","created_at":"2026-07-04T15:58:23Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/nucl-th/9404013/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Low-energy eta photoproduction on the nucleon is studied in an effective Lagrangian approach that contains Born terms, vector meson and nucleon resonance contributions. The resonance sector includes the $S_{11}(1535)$, $P_{11}(1440)$ and $D_{13}(1520)$ states whose couplings are fixed by independent electromagnetic and hadronic data. The available $(\\gamma,\\eta)$ data are employed to discuss the difference between pseudoscalar and pseudovector Born terms and to determine the magnitude of the $\\eta NN$ coupling constant. We present multipoles that are most sensitive to the various model ingredi","authors_text":"C. Bennhold, L. Tiator, S.S. Kamalov","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1994-04-12T14:22:17Z","title":"The $\\eta$NN Coupling in Eta Photoproduction"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9404013","kind":"arxiv","version":1},"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:eaff9bd17083ba45ee0762d3daf6be146b4c5412911d998ee50338625e02af7b","target":"record","created_at":"2026-07-04T15:58:23Z","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":"435d5075069910fd1f4e796dd5cab6fac612f10b4e95249d234957ba9e8ee672","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1994-04-12T14:22:17Z","title_canon_sha256":"df4b2a311ab86646f76aecbc0565eb635350322953fb5b09fa3919a958d4a378"},"schema_version":"1.0","source":{"id":"nucl-th/9404013","kind":"arxiv","version":1}},"canonical_sha256":"a05b1167d79e8734c140bd974dc29155697a6a1bd68df86ef372bcb7ab6251be","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a05b1167d79e8734c140bd974dc29155697a6a1bd68df86ef372bcb7ab6251be","first_computed_at":"2026-07-04T15:58:23.425658Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:58:23.425658Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"X3QLFrgLDbLYkRBFUjS9AH4VjgbtRnGvpEhEwGbqr27vn/BvOyd0H75pBhMY9UnGiLqqyBOlTMTI8kFxCeSqAg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:58:23.426044Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9404013","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eaff9bd17083ba45ee0762d3daf6be146b4c5412911d998ee50338625e02af7b","sha256:8551f22aa886336ea51dcbc130ae50cbcdfb92cfb5c0d53e826e818e1d18ad17"],"state_sha256":"ea3fb86026e58a9996874d0a625a3df1224dcadb85c9e464ff5650eee8783ec4"}