{"paper":{"title":"Measurement of the Cross Section for the Reaction $\\gamma p \\to \\jpsi~p$ with the ZEUS Detector at HERA","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"ZEUS Collaboration","submitted_at":"1995-03-27T15:57:36Z","abstract_excerpt":"This paper reports the cross section measurements for the process ep $\\rightarrow$ e~\\jpsi~p for $Q^2 < 4$ GeV$^2$ at $\\sqrt s = 296$ GeV, based on an integrated luminosity of about 0.5~pb$^{-1}$, using the ZEUS detector. The \\jpsi~was detected in its $\\rm e^{+}e^{-}$ and $\\rm \\mu^{+}\\mu^{-}$ decay modes. The photoproduction cross section was measured to be $52^{ \\ +7}_{-12}\\pm 10$~nb at an average $\\gamma$p centre of mass energy of 67 GeV and $71^{+13}_{-20}\\pm 12$~nb at 114 GeV. The significant rise of the cross section compared to lower energy measurements is not in agreement with VDM model"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9503015","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":""},"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"}