{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2003:U6EK6YCYCBCWA34UZ4QK6ZGDDI","short_pith_number":"pith:U6EK6YCY","schema_version":"1.0","canonical_sha256":"a788af60581045606f94cf20af64c31a2f5c847e9d51e3be853e1d45100bbddf","source":{"kind":"arxiv","id":"nucl-ex/0310028","version":1},"attestation_state":"computed","paper":{"title":"Quasi-free $\\pi^0$ Photoproduction from the Bound Nucleon","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-ex","authors_text":"A.I. L'vov, A. Natter, A. Thomas, B. Seitz, F. Smend, F. Wissmann, F. Zapadtka, G. Caselotti, G. Rosner, H.-J. Arends, J. Ahrens, J.C. McGeorge, J.R.M. Annand, K. Kossert, M. Camen, M.I. Levchuk, M. Schumacher, O. Jahn, P. Grabmayr, P. Jennewein, R. Beck, V.A. Petrun'kin, V. Olmos de Leon, W. Weihofen","submitted_at":"2003-10-28T09:30:36Z","abstract_excerpt":"Differential cross-sections for quasi-free $\\pi^0$ photoproduction from the proton and neutron bound in the deuteron have been measured for $E_\\gamma= 200 - 400$ MeV at $\\theta^{\\rm lab}_\\gamma = 136.2^\\circ$ usind the Glasgow photon tagger at MAMI, the Mainz 48 cm $\\varnothing$ $\\times$ 64 cm NaI(Tl) photon detector and the G\\\"ottingen SENECA recoil detector. For the proton measurements made with both liquid deuterium and liquid hydrogen targets allow direct comparison of \"free\" $\\pi^0$ photoproduction cross-sections as extracted from the bound proton data with experimental free cross section"},"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":"nucl-ex/0310028","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"nucl-ex","submitted_at":"2003-10-28T09:30:36Z","cross_cats_sorted":["hep-ph"],"title_canon_sha256":"a9b5d8ca75988d6358e42e147b468b4281cbfdd4b38d0704adaabfad0829f875","abstract_canon_sha256":"8d6b24aa124cf9b51ef383488706215429523500e139506385a1997c17d90621"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:57.755851Z","signature_b64":"DXn7noJ6f1EVZmkI6tTS2NaD5/QG/a/pgYajubZEsAjam0jQ5aTF/C0WlYyHF9EqdKlCITtOa/EJ0PDQehovCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a788af60581045606f94cf20af64c31a2f5c847e9d51e3be853e1d45100bbddf","last_reissued_at":"2026-05-18T03:19:57.755118Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:57.755118Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Quasi-free $\\pi^0$ Photoproduction from the Bound Nucleon","license":"","headline":"","cross_cats":["hep-ph"],"primary_cat":"nucl-ex","authors_text":"A.I. L'vov, A. Natter, A. Thomas, B. Seitz, F. Smend, F. Wissmann, F. Zapadtka, G. Caselotti, G. Rosner, H.-J. Arends, J. Ahrens, J.C. McGeorge, J.R.M. Annand, K. Kossert, M. Camen, M.I. Levchuk, M. Schumacher, O. Jahn, P. Grabmayr, P. Jennewein, R. Beck, V.A. Petrun'kin, V. Olmos de Leon, W. Weihofen","submitted_at":"2003-10-28T09:30:36Z","abstract_excerpt":"Differential cross-sections for quasi-free $\\pi^0$ photoproduction from the proton and neutron bound in the deuteron have been measured for $E_\\gamma= 200 - 400$ MeV at $\\theta^{\\rm lab}_\\gamma = 136.2^\\circ$ usind the Glasgow photon tagger at MAMI, the Mainz 48 cm $\\varnothing$ $\\times$ 64 cm NaI(Tl) photon detector and the G\\\"ottingen SENECA recoil detector. For the proton measurements made with both liquid deuterium and liquid hydrogen targets allow direct comparison of \"free\" $\\pi^0$ photoproduction cross-sections as extracted from the bound proton data with experimental free cross section"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"nucl-ex/0310028","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"nucl-ex/0310028","created_at":"2026-05-18T03:19:57.755234+00:00"},{"alias_kind":"arxiv_version","alias_value":"nucl-ex/0310028v1","created_at":"2026-05-18T03:19:57.755234+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.nucl-ex/0310028","created_at":"2026-05-18T03:19:57.755234+00:00"},{"alias_kind":"pith_short_12","alias_value":"U6EK6YCYCBCW","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_16","alias_value":"U6EK6YCYCBCWA34U","created_at":"2026-05-18T12:25:52.051335+00:00"},{"alias_kind":"pith_short_8","alias_value":"U6EK6YCY","created_at":"2026-05-18T12:25:52.051335+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI","json":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI.json","graph_json":"https://pith.science/api/pith-number/U6EK6YCYCBCWA34UZ4QK6ZGDDI/graph.json","events_json":"https://pith.science/api/pith-number/U6EK6YCYCBCWA34UZ4QK6ZGDDI/events.json","paper":"https://pith.science/paper/U6EK6YCY"},"agent_actions":{"view_html":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI","download_json":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI.json","view_paper":"https://pith.science/paper/U6EK6YCY","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=nucl-ex/0310028&json=true","fetch_graph":"https://pith.science/api/pith-number/U6EK6YCYCBCWA34UZ4QK6ZGDDI/graph.json","fetch_events":"https://pith.science/api/pith-number/U6EK6YCYCBCWA34UZ4QK6ZGDDI/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI/action/timestamp_anchor","attest_storage":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI/action/storage_attestation","attest_author":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI/action/author_attestation","sign_citation":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI/action/citation_signature","submit_replication":"https://pith.science/pith/U6EK6YCYCBCWA34UZ4QK6ZGDDI/action/replication_record"}},"created_at":"2026-05-18T03:19:57.755234+00:00","updated_at":"2026-05-18T03:19:57.755234+00:00"}