{"paper":{"title":"J/\\Psi N and Psi' N total cross sections from photoproduction data: failure of vector dominance","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"B.Z. Kopeliovich (Heidelberg), Joerg Huefner","submitted_at":"1997-12-08T13:59:32Z","abstract_excerpt":"Values for the cross sections $\\sigma^{\\Psi N}_{tot}$ and $\\sigma^{\\Psi' N}_{tot}$ are of crucial importance, once one wants to understand nuclear suppression of $J/\\Psi$($\\Psi'$) in a search for the quark gluon plasma. Quoted values are usually extracted from $\\gamma N \\to J/\\Psi(\\Psi') N$ data via the vector dominance model (VDM) and are very small compared with expectations from QCD. The validity of QCD is questioned. When the VDM is extended to a multi-channel case, the $\\gamma N$ data lead to a value $2.8\\pm 0.12 mb <\\sigma_{tot}^{\\Psi N}(\\sqrt{s}= 10 GeV) < 4.1\\pm 0.15 mb$, which is a fa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9712297","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ph/9712297/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}