{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:LN6INCGLX32I4YXQCRN45DXSTD","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":"e0008c03fe7b059cde8517f90cf48a991587b3ef148a377816081a5a029d47ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-07-30T09:39:39Z","title_canon_sha256":"98b1468349e55baff77f2b7a2f7918d1a8e81ae28ac380116742274fa82c0633"},"schema_version":"1.0","source":{"id":"0807.4821","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.4821","created_at":"2026-05-18T00:37:06Z"},{"alias_kind":"arxiv_version","alias_value":"0807.4821v1","created_at":"2026-05-18T00:37:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.4821","created_at":"2026-05-18T00:37:06Z"},{"alias_kind":"pith_short_12","alias_value":"LN6INCGLX32I","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"LN6INCGLX32I4YXQ","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"LN6INCGL","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:9f5f905536256c5da711fe3e2eccdc7c555c3985b2778494f3e7d5781b301749","target":"graph","created_at":"2026-05-18T00:37:06Z","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 formalism to evaluate the Sivers function, developed for calculations in constituent quark models, is applied to the Isgur-Karl model. A non-vanishing Sivers asymmetry, with opposite signs for the u and d flavor, is found; the Burkardt sum rule is fulfilled up to 2 %. Nuclear effects in the extraction of neutron single spin asymmetries in semi-inclusive deep inelastic scattering off 3He are also evaluated. In the kinematics of JLab, it is found that the nuclear effects described by an Impulse Approximation approach are under control.","authors_text":"A. Courtoy, F. Fratini, S. Scopetta, V. Vento","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-07-30T09:39:39Z","title":"Sivers function in constituent quark models"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.4821","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:d8aa90f977f6b722d429c3617bec1c501eb8cded54333f9e199fba31b6adce21","target":"record","created_at":"2026-05-18T00:37:06Z","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":"e0008c03fe7b059cde8517f90cf48a991587b3ef148a377816081a5a029d47ef","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ph","submitted_at":"2008-07-30T09:39:39Z","title_canon_sha256":"98b1468349e55baff77f2b7a2f7918d1a8e81ae28ac380116742274fa82c0633"},"schema_version":"1.0","source":{"id":"0807.4821","kind":"arxiv","version":1}},"canonical_sha256":"5b7c8688cbbef48e62f0145bce8ef298f2185f8f47ef03e3d48d09998adf23c9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5b7c8688cbbef48e62f0145bce8ef298f2185f8f47ef03e3d48d09998adf23c9","first_computed_at":"2026-05-18T00:37:06.095374Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:37:06.095374Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"plaHKstIhe1Z5vxEv/luC57+TZSf0CSh0CvnVZhj2gj/1mnkPdbPDeWZtSznH5N2eIUedT4/N5ytwYVOqxQeDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:37:06.095973Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.4821","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8aa90f977f6b722d429c3617bec1c501eb8cded54333f9e199fba31b6adce21","sha256:9f5f905536256c5da711fe3e2eccdc7c555c3985b2778494f3e7d5781b301749"],"state_sha256":"a7d2509d3c9850ae849e01e4f45bbea4b124818f1018e4eee3275274a43f1cd7"}