{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1997:SEKADATQMF2TSJV3A6BIYIQO5Q","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":"ba46e1b7b6fbd9d4bfbd24e0dd96bca77aac102e0a5f950de3c1be78d9a7f809","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"nucl-th","submitted_at":"1997-01-04T00:42:27Z","title_canon_sha256":"6b1eb1f351bea71dae34e203b358ab8e25e5ebbcd74573d71b7eb8d6051b9c1e"},"schema_version":"1.0","source":{"id":"nucl-th/9701008","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"nucl-th/9701008","created_at":"2026-05-18T01:05:18Z"},{"alias_kind":"arxiv_version","alias_value":"nucl-th/9701008v1","created_at":"2026-05-18T01:05:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-th/9701008","created_at":"2026-05-18T01:05:18Z"},{"alias_kind":"pith_short_12","alias_value":"SEKADATQMF2T","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_16","alias_value":"SEKADATQMF2TSJV3","created_at":"2026-05-18T12:25:48Z"},{"alias_kind":"pith_short_8","alias_value":"SEKADATQ","created_at":"2026-05-18T12:25:48Z"}],"graph_snapshots":[{"event_id":"sha256:b9816140401b991e8ff3110e11c1592fb98dca67035323850f8bdae0e0181f0b","target":"graph","created_at":"2026-05-18T01:05:18Z","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":"Using the Gerasimov-Drell-Hearn sum rule and experimental total cross sections for photoproduction of $\\eta$, $K$ and $\\phi$ mesons on the proton, we obtain upper bounds for the contribution of strange quarks to the anomalous magnetic moment of the proton, $|\\kappa_{s}| \\le 0.20 \\kappa_{p}$. The proposed experiments to measure the spin-dependence of the absorption cross section are expected to lower these bounds considerably. The existing data on $\\eta$ production and phenomenological models for $K$ production agree with a negative sign for $\\kappa_{s}$.","authors_text":"D. Drechsel (Mainz U.), H.-W. Hammer (INT, Seattle & Mainz U), T. Mart (Mainz U.)","cross_cats":["hep-ph"],"headline":"","license":"","primary_cat":"nucl-th","submitted_at":"1997-01-04T00:42:27Z","title":"Contributions of strange quarks to the magnetic moment of the proton"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9701008","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":"sha256:6271d69fef730e71887c3e1740b140a2f99abc09ea278a90eb3925ac820a5c67","target":"record","created_at":"2026-05-18T01:05:18Z","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":"ba46e1b7b6fbd9d4bfbd24e0dd96bca77aac102e0a5f950de3c1be78d9a7f809","cross_cats_sorted":["hep-ph"],"license":"","primary_cat":"nucl-th","submitted_at":"1997-01-04T00:42:27Z","title_canon_sha256":"6b1eb1f351bea71dae34e203b358ab8e25e5ebbcd74573d71b7eb8d6051b9c1e"},"schema_version":"1.0","source":{"id":"nucl-th/9701008","kind":"arxiv","version":1}},"canonical_sha256":"911401827061753926bb07828c220eec35a6cad7b8b1401fb68af4531d52f8d8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"911401827061753926bb07828c220eec35a6cad7b8b1401fb68af4531d52f8d8","first_computed_at":"2026-05-18T01:05:18.364834Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:18.364834Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i2vKwyCj3xfXzc2qOfk44HipEzTIqvZtgk5ca120q4x/AOQpJuCv1r+w0qGj6MaO4W7jtsfUt54o85RIKiYDCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:18.365401Z","signed_message":"canonical_sha256_bytes"},"source_id":"nucl-th/9701008","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6271d69fef730e71887c3e1740b140a2f99abc09ea278a90eb3925ac820a5c67","sha256:b9816140401b991e8ff3110e11c1592fb98dca67035323850f8bdae0e0181f0b"],"state_sha256":"dfd0847ff6ec82da92f00f782baea2ba15511dec55e0da6c214c2eed5df39810"}