{"paper":{"title":"JLab and J-PARC for the J/{\\ensuremath{\\psi}} Production at the Threshold","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"Axel Schmidt (GWU), Igor I. Strakovsky (GWU), Jung Keun Ahn (Korea U.), Misha G. Ryskin (PNPI), William J. Briscoe (GWU)","submitted_at":"2026-03-10T13:02:19Z","abstract_excerpt":"New threshold measurements for $\\gamma~p\\to p~J/\\psi \\to p~(\\mu^+\\mu^-)$ by 007 and $\\gamma^\\ast~p\\to p~J/\\psi \\to p~(e^+e^-)$ by CLAS12 allow us to extend the previous phenomenological determination of the J/\\ensuremath{\\psi}-proton scattering length, $\\alpha_{J/\\psi p}$, using GlueX threshold data for $\\gamma~p\\to p~J/\\psi \\to p~(e^+e^-)$. The agreement between all three J/\\ensuremath{\\psi} data sets shows no indication of systematic differences between methodologies. Furthermore, perturbative QCD predictions support the phenomenological determination of heavy vector meson-nucleon scattering"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2603.09622","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.09622/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"}