{"paper":{"title":"$J / \\psi$ electromagnetic production associated with light hadrons at $B$ factories","license":"http://creativecommons.org/licenses/by-nc-sa/3.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Bai-Qing Li, Kui-Yong Liu, Yu-Jie Zhang","submitted_at":"2010-03-29T15:18:51Z","abstract_excerpt":"The electromagnetic productions of $J \\psi$ associated with light hadrons(LH) and leptonic pairs($\\mu^+\\mu^-$, $\\tau^+\\tau^-$) at $B$ factories are studied. We find that the direct electromagnetic production cross sections of $J / \\psi$($\\psi(2S)$) associated with light hadrons is about $0.10(0.04)$ pb. The direct production cross sections of $J / \\psi$($\\psi(2S)$) associated with $\\mu^+\\mu^-$ is about $0.056(0.020)$ pb. If we include the contributions from $\\psi(2S)$ decay, we can get the prompt cross section $\\sigma[e^+e^- \\to J/\\psi +\\mu^+\\mu^-]=(0.068 \\pm 0.002)$ pb, about $(16 \\pm 5) %$ o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1003.5566","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"}