{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2002:DTQ72FGZR3FQLMU6CS2XXVRYOR","short_pith_number":"pith:DTQ72FGZ","schema_version":"1.0","canonical_sha256":"1ce1fd14d98ecb05b29e14b57bd638744d4b268dce6100496daa815fb5474f0a","source":{"kind":"arxiv","id":"hep-ph/0212160","version":2},"attestation_state":"computed","paper":{"title":"A New 5-Flavour LO Analysis and Parametrization of Parton Distributions in the Real Photon","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.Lorca (Granada U. & DESY Zeuthen), F.Cornet (Granada U.), M.Krawczyk (Warsaw U. & CERN), P.Jankowski (Warsaw U.)","submitted_at":"2002-12-11T16:54:13Z","abstract_excerpt":"New, radiatively generated, LO quark (u,d,s,c,b) and gluon densities in a real, unpolarized photon are presented. We perform a global 3-parameter fit, based on LO DGLAP evolution equations, to all available data for the structure function F2^gamma(x,Q^2). We adopt a new theoretical approach called ACOT(chi), originally introduced for the proton, to deal with the heavy-quark thresholds. This defines our basic model (CJKL model), which gives a very good description of the experimental data on F2^gamma(x,Q^2), for both Q^2 and x dependences. For comparison we perform a standard fit using the Fixe"},"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":"hep-ph/0212160","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"hep-ph","submitted_at":"2002-12-11T16:54:13Z","cross_cats_sorted":[],"title_canon_sha256":"cbbdab08a10f716a990646c26ccc9bf5b9d3ddadecd0ebb0ea7c8992943d00ae","abstract_canon_sha256":"d19c529eecdbbdab48b13f018c2f935756dd0c92d63f2d30dae1dcfdc7947bcf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:36:36.777038Z","signature_b64":"YDzVE5qONC7B1Wc/bIH4utv7U9SWxXMzHypOuVnRCev1+YD6gZlpmHKhsNoUH+dZSjjWgywf1bofbXOGi2B6CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ce1fd14d98ecb05b29e14b57bd638744d4b268dce6100496daa815fb5474f0a","last_reissued_at":"2026-05-18T02:36:36.776590Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:36:36.776590Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A New 5-Flavour LO Analysis and Parametrization of Parton Distributions in the Real Photon","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.Lorca (Granada U. & DESY Zeuthen), F.Cornet (Granada U.), M.Krawczyk (Warsaw U. & CERN), P.Jankowski (Warsaw U.)","submitted_at":"2002-12-11T16:54:13Z","abstract_excerpt":"New, radiatively generated, LO quark (u,d,s,c,b) and gluon densities in a real, unpolarized photon are presented. We perform a global 3-parameter fit, based on LO DGLAP evolution equations, to all available data for the structure function F2^gamma(x,Q^2). We adopt a new theoretical approach called ACOT(chi), originally introduced for the proton, to deal with the heavy-quark thresholds. This defines our basic model (CJKL model), which gives a very good description of the experimental data on F2^gamma(x,Q^2), for both Q^2 and x dependences. For comparison we perform a standard fit using the Fixe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0212160","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":""},"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":"hep-ph/0212160","created_at":"2026-05-18T02:36:36.776657+00:00"},{"alias_kind":"arxiv_version","alias_value":"hep-ph/0212160v2","created_at":"2026-05-18T02:36:36.776657+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-ph/0212160","created_at":"2026-05-18T02:36:36.776657+00:00"},{"alias_kind":"pith_short_12","alias_value":"DTQ72FGZR3FQ","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_16","alias_value":"DTQ72FGZR3FQLMU6","created_at":"2026-05-18T12:25:50.845339+00:00"},{"alias_kind":"pith_short_8","alias_value":"DTQ72FGZ","created_at":"2026-05-18T12:25:50.845339+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":3,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2406.08026","citing_title":"Photoproduction in general-purpose event generators","ref_index":42,"is_internal_anchor":true},{"citing_arxiv_id":"2604.24435","citing_title":"Measurement of jet photoproduction in ultra-peripheral Pb+Pb collisions without nuclear breakup at $\\sqrt{s_\\mathrm{NN}} = 5.02$ TeV with the ATLAS detector","ref_index":49,"is_internal_anchor":false},{"citing_arxiv_id":"2604.20559","citing_title":"Observation of impact parameter dependent modifications of nuclear parton distributions in photonuclear Pb+Pb collisions at $\\sqrt{s_\\mathrm{NN}} = 5.02$ TeV with the ATLAS detector","ref_index":46,"is_internal_anchor":false}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR","json":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR.json","graph_json":"https://pith.science/api/pith-number/DTQ72FGZR3FQLMU6CS2XXVRYOR/graph.json","events_json":"https://pith.science/api/pith-number/DTQ72FGZR3FQLMU6CS2XXVRYOR/events.json","paper":"https://pith.science/paper/DTQ72FGZ"},"agent_actions":{"view_html":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR","download_json":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR.json","view_paper":"https://pith.science/paper/DTQ72FGZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=hep-ph/0212160&json=true","fetch_graph":"https://pith.science/api/pith-number/DTQ72FGZR3FQLMU6CS2XXVRYOR/graph.json","fetch_events":"https://pith.science/api/pith-number/DTQ72FGZR3FQLMU6CS2XXVRYOR/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR/action/timestamp_anchor","attest_storage":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR/action/storage_attestation","attest_author":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR/action/author_attestation","sign_citation":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR/action/citation_signature","submit_replication":"https://pith.science/pith/DTQ72FGZR3FQLMU6CS2XXVRYOR/action/replication_record"}},"created_at":"2026-05-18T02:36:36.776657+00:00","updated_at":"2026-05-18T02:36:36.776657+00:00"}