{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1997:SEKADATQMF2TSJV3A6BIYIQO5Q","short_pith_number":"pith:SEKADATQ","canonical_record":{"source":{"id":"nucl-th/9701008","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-01-04T00:42:27Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"6b1eb1f351bea71dae34e203b358ab8e25e5ebbcd74573d71b7eb8d6051b9c1e","abstract_canon_sha256":"ba46e1b7b6fbd9d4bfbd24e0dd96bca77aac102e0a5f950de3c1be78d9a7f809"},"schema_version":"1.0"},"canonical_sha256":"911401827061753926bb07828c220eec35a6cad7b8b1401fb68af4531d52f8d8","source":{"kind":"arxiv","id":"nucl-th/9701008","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"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1997:SEKADATQMF2TSJV3A6BIYIQO5Q","target":"record","payload":{"canonical_record":{"source":{"id":"nucl-th/9701008","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-th","submitted_at":"1997-01-04T00:42:27Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"6b1eb1f351bea71dae34e203b358ab8e25e5ebbcd74573d71b7eb8d6051b9c1e","abstract_canon_sha256":"ba46e1b7b6fbd9d4bfbd24e0dd96bca77aac102e0a5f950de3c1be78d9a7f809"},"schema_version":"1.0"},"canonical_sha256":"911401827061753926bb07828c220eec35a6cad7b8b1401fb68af4531d52f8d8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:05:18.365401Z","signature_b64":"i2vKwyCj3xfXzc2qOfk44HipEzTIqvZtgk5ca120q4x/AOQpJuCv1r+w0qGj6MaO4W7jtsfUt54o85RIKiYDCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"911401827061753926bb07828c220eec35a6cad7b8b1401fb68af4531d52f8d8","last_reissued_at":"2026-05-18T01:05:18.364834Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:05:18.364834Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"nucl-th/9701008","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":"2026-05-18T01:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tUAWQ1p7ofIdHLO9V0GvqSQ1GVqtryXoixfzagp9H4hoLuSjq8smD+RiGRoZc9cSLsZCRZo9+jdreYfrqkvGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:29:12.488252Z"},"content_sha256":"6271d69fef730e71887c3e1740b140a2f99abc09ea278a90eb3925ac820a5c67","schema_version":"1.0","event_id":"sha256:6271d69fef730e71887c3e1740b140a2f99abc09ea278a90eb3925ac820a5c67"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1997:SEKADATQMF2TSJV3A6BIYIQO5Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Contributions of strange quarks to the magnetic moment of the proton","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-th","authors_text":"D. Drechsel (Mainz U.), H.-W. Hammer (INT, Seattle & Mainz U), T. Mart (Mainz U.)","submitted_at":"1997-01-04T00:42:27Z","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 $\\kappa_{s}$."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-th/9701008","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":"2026-05-18T01:05:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bdw3KhaiBh5fZXn1QWAzWdBDycrUjNFN61U501wcJcf4yPV/Od+7nyoma3BpdzcMziCYnhpaAdoibltk2zNDAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T15:29:12.488653Z"},"content_sha256":"b9816140401b991e8ff3110e11c1592fb98dca67035323850f8bdae0e0181f0b","schema_version":"1.0","event_id":"sha256:b9816140401b991e8ff3110e11c1592fb98dca67035323850f8bdae0e0181f0b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/bundle.json","state_url":"https://pith.science/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/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":"2026-06-01T15:29:12Z","links":{"resolver":"https://pith.science/pith/SEKADATQMF2TSJV3A6BIYIQO5Q","bundle":"https://pith.science/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/bundle.json","state":"https://pith.science/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SEKADATQMF2TSJV3A6BIYIQO5Q/bundle.json"},"state":{"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"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7pY/xuyJca9yq7VlrhAbvmNdkH0ODnaG+mAP0LjL8COXwLb1m1cbHMlRMl3vsUNIfB/c5Yzy3k2ctL/Sf/NmAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T15:29:12.490878Z","bundle_sha256":"47082477f08a899a4dbc9b9844b77b7da98c76f640ac7f987994fd63497ba7fe"}}