{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2003:RI5IX4RCCZAQXOFXOOHGIAJE2Q","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":"717260e0af824388bd9c095958e56c62efdbef68f0f699cf252c67c818281a1a","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-08T12:39:28Z","title_canon_sha256":"6c0f8decfc4ac58e1b6b4a0f617163cfaee265a6c3ffb2b3af2865ceeea7c5ee"},"schema_version":"1.0","source":{"id":"hep-ph/0309071","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/0309071","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0309071v2","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0309071","created_at":"2026-05-18T02:36:30Z"},{"alias_kind":"pith_short_12","alias_value":"RI5IX4RCCZAQ","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_16","alias_value":"RI5IX4RCCZAQXOFX","created_at":"2026-05-18T12:25:52Z"},{"alias_kind":"pith_short_8","alias_value":"RI5IX4RC","created_at":"2026-05-18T12:25:52Z"}],"graph_snapshots":[{"event_id":"sha256:57c702542fce684593dd3ce0a62793076dd440811105fb6c6741e78c3f80c6f1","target":"graph","created_at":"2026-05-18T02:36:30Z","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":"Wide-angle photoproduction of pseudoscalar mesons is investigated under the assumption of dominance of the handbag mechanism considering both quark helicity flip and non-flip. The partonic subprocess, meson photoproduction off quarks, is analysed with the help of a covariant decomposition of the subprocess amplitudes which is independent of a specific meson generation mechanism. As examples of subprocess dynamics, however, the twist-2 as well as two-particle twist-3 contributions are explicitly calculated. Characteristic features of the handbag approach are discussed in dependence upon the rel","authors_text":"H.W. Huang, K. Passek-Kumericki, P. Kroll, R. Jakob","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"2003-09-08T12:39:28Z","title":"Signatures of the handbag mechanism in wide-angle photoproduction of pseudoscalar mesons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0309071","kind":"arxiv","version":2},"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":"sha256:0ee563275cf0931f1634717ef6700f4d62a8e6031c13449f363762089d86dcdd","target":"record","created_at":"2026-05-18T02:36:30Z","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":"717260e0af824388bd9c095958e56c62efdbef68f0f699cf252c67c818281a1a","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"2003-09-08T12:39:28Z","title_canon_sha256":"6c0f8decfc4ac58e1b6b4a0f617163cfaee265a6c3ffb2b3af2865ceeea7c5ee"},"schema_version":"1.0","source":{"id":"hep-ph/0309071","kind":"arxiv","version":2}},"canonical_sha256":"8a3a8bf22216410bb8b7738e640124d42e3f854b36c6f0527bad6fc139f23983","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a3a8bf22216410bb8b7738e640124d42e3f854b36c6f0527bad6fc139f23983","first_computed_at":"2026-05-18T02:36:30.361037Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:36:30.361037Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1MXH6UlNtF4m7VNLCx5TmL+GXXN/x86rIcu1wkVo9pL14O7ggcyiY1q6pPW8CbqfMa9RG9leuZxKtVQkwqLCAw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:36:30.361452Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/0309071","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ee563275cf0931f1634717ef6700f4d62a8e6031c13449f363762089d86dcdd","sha256:57c702542fce684593dd3ce0a62793076dd440811105fb6c6741e78c3f80c6f1"],"state_sha256":"9d7bd631fe52c8ba23d32c7d49005b88730a9b0c1ce5c482fa49369ad66a6e51"}