{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:32UZFCFESO7I3ABKIVOGQWWXTA","short_pith_number":"pith:32UZFCFE","canonical_record":{"source":{"id":"nucl-th/9710036","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-10-16T08:33:56Z","cross_cats_sorted":[],"title_canon_sha256":"f2e5fc9865ebe790e2c61bc9066ca3e2994b8aac229addd42cd37b95cdc4854d","abstract_canon_sha256":"59eddc994e6de89c638722d559551cb066b8f175522da08f5630c3fc078fe232"},"schema_version":"1.0"},"canonical_sha256":"dea99288a493be8d802a455c685ad7983d8d8a0788ee5861164a33073d5cea95","source":{"kind":"arxiv","id":"nucl-th/9710036","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9710036","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9710036v1","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9710036","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"pith_short_12","alias_value":"32UZFCFESO7I","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"32UZFCFESO7I3ABK","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"32UZFCFE","created_at":"2026-05-18T12:25:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:32UZFCFESO7I3ABKIVOGQWWXTA","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-th/9710036","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-10-16T08:33:56Z","cross_cats_sorted":[],"title_canon_sha256":"f2e5fc9865ebe790e2c61bc9066ca3e2994b8aac229addd42cd37b95cdc4854d","abstract_canon_sha256":"59eddc994e6de89c638722d559551cb066b8f175522da08f5630c3fc078fe232"},"schema_version":"1.0"},"canonical_sha256":"dea99288a493be8d802a455c685ad7983d8d8a0788ee5861164a33073d5cea95","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:24:14.871800Z","signature_b64":"/lNq9EOmdp4tBYXqzD925mAoXjoPlZu9Zkifsf2JnwNjB/4UdfBPqiZ/IuC+Xwg4MzeL/2fXv5FugCIIjTeiCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dea99288a493be8d802a455c685ad7983d8d8a0788ee5861164a33073d5cea95","last_reissued_at":"2026-05-18T04:24:14.871346Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:24:14.871346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-th/9710036","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":"2026-05-18T04:24:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"PF9GlpRAFuHZGDzF+d5HHaHJF9VPbr29oJ5Tu3J7JEuQwFuqLeZrdr2WkP3I13isAm0yKtUMleraOb0ZatFlAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:10:58.820616Z"},"content_sha256":"8be6d79076ea3ce8893ac13e01679499056ff1f67f8bf7417e9e3440f118bf87","schema_version":"1.0","event_id":"sha256:8be6d79076ea3ce8893ac13e01679499056ff1f67f8bf7417e9e3440f118bf87"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:32UZFCFESO7I3ABKIVOGQWWXTA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dispersion Theoretical Analysis of Pion Photoproduction at Threshold and in the Delta Region","license":"","headline":"","cross_cats":[],"primary_cat":"nucl-th","authors_text":"L. Tiator (Universitaet Mainz)","submitted_at":"1997-10-16T08:33:56Z","abstract_excerpt":"A new partial wave analysis of pion photoproduction has been obtained in the framework of fixed-t dispersion relations valid form threshold up to 500 MeV. It is based on new Mainz data for \\pi^{0} and \\pi^{+} production off the proton and both older and more recent data from Bonn, Frascati and TRIUMF for \\pi^{+} and \\pi^{-}. At threshold we obtain a good agreement with the existing data for both charged and neutral pion production. In the resonance region we have precisely determined the electromagnetic properties of the \\Delta(1232) resonance, in particular the E2/M1 ratio R_{EM}=(-2.5 \\pm 0."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9710036","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:24:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xXt8lM4Rhqs4/B/vZyqadJWvBrkHpAv4TtZO8eqJKLwVHsNDAZs+UadYVFAw1Efj74HlltPOz07zPHW8TgoPAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T01:10:58.820936Z"},"content_sha256":"a8f163af1147df2545f32f36604a91a77dd7892c4a1f34c651fb8ef90abb771a","schema_version":"1.0","event_id":"sha256:a8f163af1147df2545f32f36604a91a77dd7892c4a1f34c651fb8ef90abb771a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/32UZFCFESO7I3ABKIVOGQWWXTA/bundle.json","state_url":"https://pith.science/pith/32UZFCFESO7I3ABKIVOGQWWXTA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/32UZFCFESO7I3ABKIVOGQWWXTA/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":"2026-06-04T01:10:58Z","links":{"resolver":"https://pith.science/pith/32UZFCFESO7I3ABKIVOGQWWXTA","bundle":"https://pith.science/pith/32UZFCFESO7I3ABKIVOGQWWXTA/bundle.json","state":"https://pith.science/pith/32UZFCFESO7I3ABKIVOGQWWXTA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/32UZFCFESO7I3ABKIVOGQWWXTA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:32UZFCFESO7I3ABKIVOGQWWXTA","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":"59eddc994e6de89c638722d559551cb066b8f175522da08f5630c3fc078fe232","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1997-10-16T08:33:56Z","title_canon_sha256":"f2e5fc9865ebe790e2c61bc9066ca3e2994b8aac229addd42cd37b95cdc4854d"},"schema_version":"1.0","source":{"id":"nucl-th/9710036","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9710036","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9710036v1","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9710036","created_at":"2026-05-18T04:24:14Z"},{"alias_kind":"pith_short_12","alias_value":"32UZFCFESO7I","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"32UZFCFESO7I3ABK","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"32UZFCFE","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:a8f163af1147df2545f32f36604a91a77dd7892c4a1f34c651fb8ef90abb771a","target":"graph","created_at":"2026-05-18T04:24:14Z","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":"A new partial wave analysis of pion photoproduction has been obtained in the framework of fixed-t dispersion relations valid form threshold up to 500 MeV. It is based on new Mainz data for \\pi^{0} and \\pi^{+} production off the proton and both older and more recent data from Bonn, Frascati and TRIUMF for \\pi^{+} and \\pi^{-}. At threshold we obtain a good agreement with the existing data for both charged and neutral pion production. In the resonance region we have precisely determined the electromagnetic properties of the \\Delta(1232) resonance, in particular the E2/M1 ratio R_{EM}=(-2.5 \\pm 0.","authors_text":"L. Tiator (Universitaet Mainz)","cross_cats":[],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1997-10-16T08:33:56Z","title":"Dispersion Theoretical Analysis of Pion Photoproduction at Threshold and in the Delta Region"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9710036","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":"sha256:8be6d79076ea3ce8893ac13e01679499056ff1f67f8bf7417e9e3440f118bf87","target":"record","created_at":"2026-05-18T04:24:14Z","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":"59eddc994e6de89c638722d559551cb066b8f175522da08f5630c3fc078fe232","cross_cats_sorted":[],"license":"","primary_cat":"nucl-th","submitted_at":"1997-10-16T08:33:56Z","title_canon_sha256":"f2e5fc9865ebe790e2c61bc9066ca3e2994b8aac229addd42cd37b95cdc4854d"},"schema_version":"1.0","source":{"id":"nucl-th/9710036","kind":"arxiv","version":1}},"canonical_sha256":"dea99288a493be8d802a455c685ad7983d8d8a0788ee5861164a33073d5cea95","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dea99288a493be8d802a455c685ad7983d8d8a0788ee5861164a33073d5cea95","first_computed_at":"2026-05-18T04:24:14.871346Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:24:14.871346Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/lNq9EOmdp4tBYXqzD925mAoXjoPlZu9Zkifsf2JnwNjB/4UdfBPqiZ/IuC+Xwg4MzeL/2fXv5FugCIIjTeiCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:24:14.871800Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9710036","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8be6d79076ea3ce8893ac13e01679499056ff1f67f8bf7417e9e3440f118bf87","sha256:a8f163af1147df2545f32f36604a91a77dd7892c4a1f34c651fb8ef90abb771a"],"state_sha256":"14e3718bc665fd883ec49301420bba34b492b573a5e4f6d4ab98fe63fffd4e63"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a3FVQ8DJ9PBEYvGq4zU+bwIx0sOox8zSxuIkK1vxGkakYzsODpYbmP+xwGAvQ2x2kudC6KN3r4ZGMJRnF3CwBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T01:10:58.822717Z","bundle_sha256":"ba9ceb504571b43318fdf57332ac7450c7ea2dc088e3241c30fc24d42cb3296d"}}