{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1995:OR2ZOF3QFBWUZ2AC6GSGPRT6TN","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":"e4c29690fb0f9e042e60e08f8e2d1e453ced81411a8b8899c8ee6a734a419c71","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1995-11-03T16:40:40Z","title_canon_sha256":"34ab74955dc7765482d14c8166329764fee64ecde6db17cf31941879c1c294fe"},"schema_version":"1.0","source":{"id":"hep-ph/9511228","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-ph/9511228","created_at":"2026-07-04T15:07:31Z"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/9511228v2","created_at":"2026-07-04T15:07:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/9511228","created_at":"2026-07-04T15:07:31Z"},{"alias_kind":"pith_short_12","alias_value":"OR2ZOF3QFBWU","created_at":"2026-07-04T15:07:31Z"},{"alias_kind":"pith_short_16","alias_value":"OR2ZOF3QFBWUZ2AC","created_at":"2026-07-04T15:07:31Z"},{"alias_kind":"pith_short_8","alias_value":"OR2ZOF3Q","created_at":"2026-07-04T15:07:31Z"}],"graph_snapshots":[{"event_id":"sha256:7cfa546ad827afa8975fbb3c4b5923573b0590b6d3ec69ba6f4e5b444c783d78","target":"graph","created_at":"2026-07-04T15:07:31Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/hep-ph/9511228/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We use perturbative QCD, beyond the leading $\\ln Q^2$ approximation, to show how measurements of diffractive $J/\\psi$ production at HERA can provide a sensitive probe of the gluon density of the proton at small values of Bjorken $x$. We estimate both the effect of the relativistic motion of the $c$ and $\\overline{c}$ within the $J/\\psi$ and of the rescattering of the $c\\overline{c}$ quark pair on the proton. We find that the available data for diffractive $J/\\psi$ photoproduction can discriminate between the gluon distributions of the most recent sets of partons.","authors_text":"A.D. Martin, E.M. Levin, M.G. Ryskin, R.G. Roberts","cross_cats":[],"headline":"","license":"","primary_cat":"hep-ph","submitted_at":"1995-11-03T16:40:40Z","title":"Diffractive $J/\\psi$ photoproduction as a probe of the gluon density"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9511228","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":"sha256:87e9872567562a4acabd35d077ca66f869f2dd5f0d250922026ccf8f55691868","target":"record","created_at":"2026-07-04T15:07:31Z","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":"e4c29690fb0f9e042e60e08f8e2d1e453ced81411a8b8899c8ee6a734a419c71","cross_cats_sorted":[],"license":"","primary_cat":"hep-ph","submitted_at":"1995-11-03T16:40:40Z","title_canon_sha256":"34ab74955dc7765482d14c8166329764fee64ecde6db17cf31941879c1c294fe"},"schema_version":"1.0","source":{"id":"hep-ph/9511228","kind":"arxiv","version":2}},"canonical_sha256":"7475971770286d4ce802f1a467c67e9b484126e4bf5789333ff707bb4a31874a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7475971770286d4ce802f1a467c67e9b484126e4bf5789333ff707bb4a31874a","first_computed_at":"2026-07-04T15:07:31.478328Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:07:31.478328Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nXH7x3mpbz6YiqkqPrvUpU6hnLM3m4cmdNmKaVELAD1kBXfO64nyFnIy78ICXTTY+7fXOHBrj3V4cD11AawxAQ==","signature_status":"signed_v1","signed_at":"2026-07-04T15:07:31.478723Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-ph/9511228","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:87e9872567562a4acabd35d077ca66f869f2dd5f0d250922026ccf8f55691868","sha256:7cfa546ad827afa8975fbb3c4b5923573b0590b6d3ec69ba6f4e5b444c783d78"],"state_sha256":"50ed8a3610a713016b1b4326888d8a5a5c3be34d5e8a46ee7420879962eb2fc1"}