{"paper":{"title":"Exclusive J/$\\psi$ photoproduction off protons in ultra-peripheral p-Pb collisions at $\\sqrt{s_{\\rm NN}}=5.02$ TeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"nucl-ex","authors_text":"ALICE Collaboration","submitted_at":"2014-06-30T17:15:05Z","abstract_excerpt":"We present the first measurement at the LHC of exclusive J/$\\psi$ photoproduction off protons, in ultra-peripheral proton-lead collisions at $\\sqrt{s_{\\rm NN}}=5.02$ TeV. Events are selected with a dimuon pair produced either in the rapidity interval, in the laboratory frame, $2.5<y<4$ (p-Pb) or $-3.6<y<-2.6$ (Pb--p), and no other particles observed in the ALICE acceptance. The measured cross sections $\\sigma (\\gamma + {\\rm p} \\rightarrow J/\\psi + {\\rm p})$ are 33.2 $\\pm$ 2.2 (stat) $\\pm$ 3.1 (syst) $\\pm$ 0.7 (theo) nb in p-Pb and 284 $\\pm$ 36 (stat) $^{+27}_{-32}$ (syst) $\\pm$ 26 (theo) nb in"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.7819","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"}