{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MCBLML7NU2IYWSMTWLQX67XJD2","short_pith_number":"pith:MCBLML7N","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"},"canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","source":{"kind":"arxiv","id":"0906.1424","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.1424","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"arxiv_version","alias_value":"0906.1424v1","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1424","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"pith_short_12","alias_value":"MCBLML7NU2IY","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MCBLML7NU2IYWSMT","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MCBLML7N","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MCBLML7NU2IYWSMTWLQX67XJD2","target":"record","payload":{"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"},"canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","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"},"source_kind":"arxiv","source_id":"0906.1424","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:48:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7Qj3WT5mfYijtzUWmMJeUZGZXHBpOoAkHz3dRp6/aymh0HphLE8+NgkQTfMaM4H8Ne299xAYIa1uweGI3As/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T07:02:19.896103Z"},"content_sha256":"12236fac66510c604d46c559449623c00a1fccf2fbcb3c6fdf0f9a9ed8f569a8","schema_version":"1.0","event_id":"sha256:12236fac66510c604d46c559449623c00a1fccf2fbcb3c6fdf0f9a9ed8f569a8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MCBLML7NU2IYWSMTWLQX67XJD2","target":"graph","payload":{"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:48:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FZ3wP/y8JUpKW970RECBEb4q0ag4JSb45fSA4j2xuBl3Kzure91/AkC4/3nxCW8/psjM8B+Lnwlt5GkUdd9MBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-07T07:02:19.896753Z"},"content_sha256":"37f9168bae24b34a89b0df186a9b2e2516773eabd93517b46229928fd001d17d","schema_version":"1.0","event_id":"sha256:37f9168bae24b34a89b0df186a9b2e2516773eabd93517b46229928fd001d17d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/bundle.json","state_url":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MCBLML7NU2IYWSMTWLQX67XJD2/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-07T07:02:19Z","links":{"resolver":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2","bundle":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/bundle.json","state":"https://pith.science/pith/MCBLML7NU2IYWSMTWLQX67XJD2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MCBLML7NU2IYWSMTWLQX67XJD2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MCBLML7NU2IYWSMTWLQX67XJD2","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":"8f9b1599101ec38f34eb9ed6ea16651f7db3fbdbe8a3c3c9ceafb50c9af510b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-06-08T07:49:30Z","title_canon_sha256":"7f6cdad5a14765572a09b33fb09c29421c39389f3ac7f76f82fff2b56afa7b16"},"schema_version":"1.0","source":{"id":"0906.1424","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.1424","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"arxiv_version","alias_value":"0906.1424v1","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.1424","created_at":"2026-05-18T03:48:02Z"},{"alias_kind":"pith_short_12","alias_value":"MCBLML7NU2IY","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MCBLML7NU2IYWSMT","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MCBLML7N","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:37f9168bae24b34a89b0df186a9b2e2516773eabd93517b46229928fd001d17d","target":"graph","created_at":"2026-05-18T03:48:02Z","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":"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.","authors_text":"ZEUS Collaboration","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-06-08T07:49:30Z","title":"Measurement of $J/\\psi$ helicity distributions in inelastic photoproduction at HERA"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.1424","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":"sha256:12236fac66510c604d46c559449623c00a1fccf2fbcb3c6fdf0f9a9ed8f569a8","target":"record","created_at":"2026-05-18T03:48:02Z","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":"8f9b1599101ec38f34eb9ed6ea16651f7db3fbdbe8a3c3c9ceafb50c9af510b2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2009-06-08T07:49:30Z","title_canon_sha256":"7f6cdad5a14765572a09b33fb09c29421c39389f3ac7f76f82fff2b56afa7b16"},"schema_version":"1.0","source":{"id":"0906.1424","kind":"arxiv","version":1}},"canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6082b62feda6918b4993b2e17f7ee91eac8262670c7c294259e0c0a60d99ddb0","first_computed_at":"2026-05-18T03:48:02.526464Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:48:02.526464Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cosD08PmlSq48mWUjcxbr/VhEci7BUkGjZ1fl/aGIbrCPf+4LAwLw6/n90vmtSM5kTaCol46VcwIWpCQRmp+Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:48:02.526866Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.1424","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:12236fac66510c604d46c559449623c00a1fccf2fbcb3c6fdf0f9a9ed8f569a8","sha256:37f9168bae24b34a89b0df186a9b2e2516773eabd93517b46229928fd001d17d"],"state_sha256":"9b0a1bc489675cd4d5c5f87a3abcaef23e469f4b04d46ad00960f3cc8d9b28e3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qSg2ovDf9dmkONhemA3ndg2eTSh5iHWMbrE+ggDkhrzUJK9U8eNhbszmNVyhC5e6ByTxGQ3FSrASqXAtZFhbDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-07T07:02:19.900171Z","bundle_sha256":"24b2dd428c708fe5b33ec873ca2ab5f74afd88c8c4acc1a32ec033b5232b0568"}}