{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2021:TYEYAKAV3QJIN2334TA57R7W7I","short_pith_number":"pith:TYEYAKAV","schema_version":"1.0","canonical_sha256":"9e09802815dc1286eb7be4c1dfc7f6fa2b2d8e1bee3790a1361e79308ca12629","source":{"kind":"arxiv","id":"2107.04544","version":2},"attestation_state":"computed","paper":{"title":"Wide-angle photo- and electroproduction of pions to twist-3 accuracy","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Kornelija Passek-Kumeri\\v{c}ki, Peter Kroll","submitted_at":"2021-07-09T16:59:06Z","abstract_excerpt":"We investigate wide-angle photo- and electroproduction of pions within the handbag mechanism in which the $\\gamma^{(*)} N\\to \\pi N'$ amplitudes factorize into hard partonic subprocess amplitudes, $\\gamma^{(*)} q\\to \\pi q'$, and form factors representing $1/x$-moments of generalized parton distributions (GPDs). The subprocess is calculated to twist-3 accuracy taking into account the 2- and 3-body Fock components of the pion. Both components are required for achieving gauge invariance in QED and QCD. The twist-2 and twist-3 distribution amplitudes (DAs) of the pion as well as the form factors ar"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2107.04544","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"hep-ph","submitted_at":"2021-07-09T16:59:06Z","cross_cats_sorted":["hep-ex"],"title_canon_sha256":"cbbbb3c8cfa586903a85d4aa7b8d017ce161f6e6940c1800ebb4184c8ef1cdda","abstract_canon_sha256":"b30bd276fc5668563824053869c0861db2a69d01d1fad26fb5dc9b62133f07f8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:08:15.736476Z","signature_b64":"QVC5hwvXYc5DvDA/N7rrSJRysqPS6up0QR6L1lRW8Fphkvp4B7PymK+N5m9BlpJW8TBcbXyR8hXBCAznZaBfBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e09802815dc1286eb7be4c1dfc7f6fa2b2d8e1bee3790a1361e79308ca12629","last_reissued_at":"2026-07-05T04:08:15.735984Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:08:15.735984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Wide-angle photo- and electroproduction of pions to twist-3 accuracy","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Kornelija Passek-Kumeri\\v{c}ki, Peter Kroll","submitted_at":"2021-07-09T16:59:06Z","abstract_excerpt":"We investigate wide-angle photo- and electroproduction of pions within the handbag mechanism in which the $\\gamma^{(*)} N\\to \\pi N'$ amplitudes factorize into hard partonic subprocess amplitudes, $\\gamma^{(*)} q\\to \\pi q'$, and form factors representing $1/x$-moments of generalized parton distributions (GPDs). The subprocess is calculated to twist-3 accuracy taking into account the 2- and 3-body Fock components of the pion. Both components are required for achieving gauge invariance in QED and QCD. The twist-2 and twist-3 distribution amplitudes (DAs) of the pion as well as the form factors ar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.04544","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.04544/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2107.04544","created_at":"2026-07-05T04:08:15.736045+00:00"},{"alias_kind":"arxiv_version","alias_value":"2107.04544v2","created_at":"2026-07-05T04:08:15.736045+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.04544","created_at":"2026-07-05T04:08:15.736045+00:00"},{"alias_kind":"pith_short_12","alias_value":"TYEYAKAV3QJI","created_at":"2026-07-05T04:08:15.736045+00:00"},{"alias_kind":"pith_short_16","alias_value":"TYEYAKAV3QJIN233","created_at":"2026-07-05T04:08:15.736045+00:00"},{"alias_kind":"pith_short_8","alias_value":"TYEYAKAV","created_at":"2026-07-05T04:08:15.736045+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2608.05330","citing_title":"Photon-nucleon entanglement in Compton scattering at low and high energies","ref_index":75,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I","json":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I.json","graph_json":"https://pith.science/api/pith-number/TYEYAKAV3QJIN2334TA57R7W7I/graph.json","events_json":"https://pith.science/api/pith-number/TYEYAKAV3QJIN2334TA57R7W7I/events.json","paper":"https://pith.science/paper/TYEYAKAV"},"agent_actions":{"view_html":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I","download_json":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I.json","view_paper":"https://pith.science/paper/TYEYAKAV","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2107.04544&json=true","fetch_graph":"https://pith.science/api/pith-number/TYEYAKAV3QJIN2334TA57R7W7I/graph.json","fetch_events":"https://pith.science/api/pith-number/TYEYAKAV3QJIN2334TA57R7W7I/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I/action/storage_attestation","attest_author":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I/action/author_attestation","sign_citation":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I/action/citation_signature","submit_replication":"https://pith.science/pith/TYEYAKAV3QJIN2334TA57R7W7I/action/replication_record"}},"created_at":"2026-07-05T04:08:15.736045+00:00","updated_at":"2026-07-05T04:08:15.736045+00:00"}