{"paper":{"title":"Intrinsic Charm In Proton and $J/\\psi$ Photoproduction at High Energies","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"V.A.Saleev","submitted_at":"1994-02-16T10:02:31Z","abstract_excerpt":"Based on a perturbative theory of quantum chromodynamics and non-relativistic quark model, associated $J/\\psi$ plus open charm photoproduction on charm quarks in a proton via partonic subprocess $\\gamma c\\to J/\\psi c$ is discussed. It is shown that the value and energy dependence of the cross section for such process remarkably depends on the choice of charm distribution function in a proton. In the region of small $z=E_J/E_{\\gamma}<0.2$ the contribution of the $\\gamma c\\to J/\\psi c$ subprocess in the inelastic $J/\\psi$ photoproduction spectra is larger than the contribution of the photon-gluo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9402309","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"}