{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:MCBLML7NU2IYWSMTWLQX67XJD2","short_pith_number":"pith:MCBLML7N","schema_version":"1.0","canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","source":{"kind":"arxiv","id":"0906.1424","version":1},"attestation_state":"computed","paper":{"title":"Measurement of $J/\\psi$ helicity distributions in inelastic photoproduction at HERA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"ZEUS Collaboration","submitted_at":"2009-06-08T07:49:30Z","abstract_excerpt":"The $J/\\psi$ decay angular distributions have been measured in inelastic photoproduction in $e p$ collisions with the ZEUS detector at HERA, using an integrated luminosity of 468 $pb^{-1}$. The range in photon-proton centre-of-mass energy, $W$, was 50 $< W <$ 180 $GeV$. The $J/\\psi$ mesons were identified through their decay into muon pairs. The polar and azimuthal angles of the $\\mu^+$ were measured in the $J/\\psi$ rest frame and compared to theoretical predictions at leading and next-to-leading order in QCD."},"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":"0906.1424","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-06-08T07:49:30Z","cross_cats_sorted":[],"title_canon_sha256":"7f6cdad5a14765572a09b33fb09c29421c39389f3ac7f76f82fff2b56afa7b16","abstract_canon_sha256":"8f9b1599101ec38f34eb9ed6ea16651f7db3fbdbe8a3c3c9ceafb50c9af510b2"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:48:02.526866Z","signature_b64":"cosD08PmlSq48mWUjcxbr/VhEci7BUkGjZ1fl/aGIbrCPf+4LAwLw6/n90vmtSM5kTaCol46VcwIWpCQRmp+Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","last_reissued_at":"2026-05-18T03:48:02.526464Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:48:02.526464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Measurement of $J/\\psi$ helicity distributions in inelastic photoproduction at HERA","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"ZEUS Collaboration","submitted_at":"2009-06-08T07:49:30Z","abstract_excerpt":"The $J/\\psi$ decay angular distributions have been measured in inelastic photoproduction in $e p$ collisions with the ZEUS detector at HERA, using an integrated luminosity of 468 $pb^{-1}$. The range in photon-proton centre-of-mass energy, $W$, was 50 $< W <$ 180 $GeV$. The $J/\\psi$ mesons were identified through their decay into muon pairs. The polar and azimuthal angles of the $\\mu^+$ were measured in the $J/\\psi$ rest frame and compared to theoretical predictions at leading and next-to-leading order in QCD."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.1424","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":"0906.1424","created_at":"2026-05-18T03:48:02.526533+00:00"},{"alias_kind":"arxiv_version","alias_value":"0906.1424v1","created_at":"2026-05-18T03:48:02.526533+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1424","created_at":"2026-05-18T03:48:02.526533+00:00"},{"alias_kind":"pith_short_12","alias_value":"MCBLML7NU2IY","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"MCBLML7NU2IYWSMT","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"MCBLML7N","created_at":"2026-05-18T12:26:00.592388+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/MCBLML7NU2IYWSMTWLQX67XJD2","json":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2.json","graph_json":"https://pith.science/api/pith-number/MCBLML7NU2IYWSMTWLQX67XJD2/graph.json","events_json":"https://pith.science/api/pith-number/MCBLML7NU2IYWSMTWLQX67XJD2/events.json","paper":"https://pith.science/paper/MCBLML7N"},"agent_actions":{"view_html":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2","download_json":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2.json","view_paper":"https://pith.science/paper/MCBLML7N","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0906.1424&json=true","fetch_graph":"https://pith.science/api/pith-number/MCBLML7NU2IYWSMTWLQX67XJD2/graph.json","fetch_events":"https://pith.science/api/pith-number/MCBLML7NU2IYWSMTWLQX67XJD2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/action/storage_attestation","attest_author":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/action/author_attestation","sign_citation":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/action/citation_signature","submit_replication":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/action/replication_record"}},"created_at":"2026-05-18T03:48:02.526533+00:00","updated_at":"2026-05-18T03:48:02.526533+00:00"}