{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1994:EHXTMOYC7LYC4IT33M3CAS3XRV","short_pith_number":"pith:EHXTMOYC","canonical_record":{"source":{"id":"hep-ph/9412248","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1994-12-06T16:25:15Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"d41c3f5ec35b3683d28ee0442a3067d358e93bb270c2cd231108c6473204a088","abstract_canon_sha256":"17ed1c11094ef40fd1c7398c3696bdd6d943dd1225f45c82b1e71bdd596a0a97"},"schema_version":"1.0"},"canonical_sha256":"21ef363b02faf02e227bdb36204b778d5eb69455fdee3d946a60c1de0fa18c41","source":{"kind":"arxiv","id":"hep-ph/9412248","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9412248","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9412248v1","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9412248","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_12","alias_value":"EHXTMOYC7LYC","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_16","alias_value":"EHXTMOYC7LYC4IT3","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_8","alias_value":"EHXTMOYC","created_at":"2026-07-04T15:50:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1994:EHXTMOYC7LYC4IT33M3CAS3XRV","target":"record","payload":{"canonical_record":{"source":{"id":"hep-ph/9412248","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"1994-12-06T16:25:15Z","cross_cats_sorted":["nucl-th"],"title_canon_sha256":"d41c3f5ec35b3683d28ee0442a3067d358e93bb270c2cd231108c6473204a088","abstract_canon_sha256":"17ed1c11094ef40fd1c7398c3696bdd6d943dd1225f45c82b1e71bdd596a0a97"},"schema_version":"1.0"},"canonical_sha256":"21ef363b02faf02e227bdb36204b778d5eb69455fdee3d946a60c1de0fa18c41","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:50:50.480995Z","signature_b64":"QbJ/Hlq+GfhsuVQY1vRlKDrbNfjRCM+oCABWNRALeHv9Yn/MJFjUum/bS9ZKOjD7gMgopd2njgtZiTvXVaTsBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21ef363b02faf02e227bdb36204b778d5eb69455fdee3d946a60c1de0fa18c41","last_reissued_at":"2026-07-04T15:50:50.480583Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:50:50.480583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-ph/9412248","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:50:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nBrhivL3lMqzbhiMvow5/bwjgvWSqGj/FvuwmQy9OweTG34KI92eUNVe2mmHZBHHIZv0Bn6bKeI3yClnYMruCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T15:04:24.429790Z"},"content_sha256":"a62b0ec15ead91df03eb018dcd82b193d94c85829ddfc56935835c3934777e03","schema_version":"1.0","event_id":"sha256:a62b0ec15ead91df03eb018dcd82b193d94c85829ddfc56935835c3934777e03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1994:EHXTMOYC7LYC4IT33M3CAS3XRV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{*}(1535)$ Region","license":"","headline":"","cross_cats":["nucl-th"],"primary_cat":"hep-ph","authors_text":"J. F. Zhang, M. Benmerrouche, N. C. Mukhopadhyay","submitted_at":"1994-12-06T16:25:15Z","abstract_excerpt":"We investigate eta photoproduction in the $N^{*}(1535)$ resonance region within the effective Lagrangian approach (ELA), wherein leading contributions to the amplitude at the tree level are taken into account. These include the nucleon Born terms and the leading $t$-channel vector meson exchanges as the non-resonant pieces. In addition, we consider five resonance contributions in the $s$- and $u$- channel; besides the dominant $N^{*}(1535)$, these are: $N^{*}(1440),N^{*}(1520),N^{*}(1650)$ and $N^{*}(1710)$. The amplitudes for the $\\pi^\\circ$ and the $\\eta$ photoproduction near threshold have "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9412248","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/9412248/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T15:50:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eB+rFzrPBNza4VulQG/H8wXQGBGpm6/tsV3cKJl5zkLHqb1D2ACiPYRIu5WEuY99pg7U1GjKdZgHtKcQ79fXCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T15:04:24.430137Z"},"content_sha256":"b04ccf56efbf0a09725de9b45c9488787ee1fe3e29824a255a3568962474018d","schema_version":"1.0","event_id":"sha256:b04ccf56efbf0a09725de9b45c9488787ee1fe3e29824a255a3568962474018d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/bundle.json","state_url":"https://pith.science/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/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":"2026-08-11T15:04:24Z","links":{"resolver":"https://pith.science/pith/EHXTMOYC7LYC4IT33M3CAS3XRV","bundle":"https://pith.science/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/bundle.json","state":"https://pith.science/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EHXTMOYC7LYC4IT33M3CAS3XRV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1994:EHXTMOYC7LYC4IT33M3CAS3XRV","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":"17ed1c11094ef40fd1c7398c3696bdd6d943dd1225f45c82b1e71bdd596a0a97","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1994-12-06T16:25:15Z","title_canon_sha256":"d41c3f5ec35b3683d28ee0442a3067d358e93bb270c2cd231108c6473204a088"},"schema_version":"1.0","source":{"id":"hep-ph/9412248","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9412248","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9412248v1","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9412248","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_12","alias_value":"EHXTMOYC7LYC","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_16","alias_value":"EHXTMOYC7LYC4IT3","created_at":"2026-07-04T15:50:50Z"},{"alias_kind":"pith_short_8","alias_value":"EHXTMOYC","created_at":"2026-07-04T15:50:50Z"}],"graph_snapshots":[{"event_id":"sha256:b04ccf56efbf0a09725de9b45c9488787ee1fe3e29824a255a3568962474018d","target":"graph","created_at":"2026-07-04T15:50:50Z","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/hep-ph/9412248/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We investigate eta photoproduction in the $N^{*}(1535)$ resonance region within the effective Lagrangian approach (ELA), wherein leading contributions to the amplitude at the tree level are taken into account. These include the nucleon Born terms and the leading $t$-channel vector meson exchanges as the non-resonant pieces. In addition, we consider five resonance contributions in the $s$- and $u$- channel; besides the dominant $N^{*}(1535)$, these are: $N^{*}(1440),N^{*}(1520),N^{*}(1650)$ and $N^{*}(1710)$. The amplitudes for the $\\pi^\\circ$ and the $\\eta$ photoproduction near threshold have ","authors_text":"J. F. Zhang, M. Benmerrouche, N. C. Mukhopadhyay","cross_cats":["nucl-th"],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1994-12-06T16:25:15Z","title":"Effective Lagrangian Approach to the Theory of Eta Photoproduction in the $N^{*}(1535)$ Region"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9412248","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:a62b0ec15ead91df03eb018dcd82b193d94c85829ddfc56935835c3934777e03","target":"record","created_at":"2026-07-04T15:50:50Z","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":"17ed1c11094ef40fd1c7398c3696bdd6d943dd1225f45c82b1e71bdd596a0a97","cross_cats_sorted":["nucl-th"],"license":"","primary_cat":"hep-ph","submitted_at":"1994-12-06T16:25:15Z","title_canon_sha256":"d41c3f5ec35b3683d28ee0442a3067d358e93bb270c2cd231108c6473204a088"},"schema_version":"1.0","source":{"id":"hep-ph/9412248","kind":"arxiv","version":1}},"canonical_sha256":"21ef363b02faf02e227bdb36204b778d5eb69455fdee3d946a60c1de0fa18c41","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"21ef363b02faf02e227bdb36204b778d5eb69455fdee3d946a60c1de0fa18c41","first_computed_at":"2026-07-04T15:50:50.480583Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:50:50.480583Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"QbJ/Hlq+GfhsuVQY1vRlKDrbNfjRCM+oCABWNRALeHv9Yn/MJFjUum/bS9ZKOjD7gMgopd2njgtZiTvXVaTsBw==","signature_status":"signed_v1","signed_at":"2026-07-04T15:50:50.480995Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9412248","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a62b0ec15ead91df03eb018dcd82b193d94c85829ddfc56935835c3934777e03","sha256:b04ccf56efbf0a09725de9b45c9488787ee1fe3e29824a255a3568962474018d"],"state_sha256":"4e6f596bf9fc49aa602f863615bba9911efe726d5bf714474162360573e4a86a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jCRqrTBHEyV3mls7fs/YBCmZXYN77TIFYuZfn/N3Hkaz9gD9XiQNf8kFrLTcZD5Em3OJ1t/vxTGDtxPqRn2OBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T15:04:24.434195Z","bundle_sha256":"610e095b11600f79ad394a8dc7897dd4146c0e84a25617c7cc49dddd75cb6c21"}}