{"paper":{"title":"Measurements of the cross sections for $e^+e^- \\to {\\rm hadrons}$ at 3.650, 3.6648, 3.773 GeV and the branching fraction for $\\psi(3770)\\to {\\rm non-}D\\bar D$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"M. Ablikim et al. (BES Collaboration)","submitted_at":"2006-05-24T16:27:34Z","abstract_excerpt":"Using the BES-II detector at the BEPC Collider, we measured the lowest order cross sections and the $R$ values ($R=\\sigma^0_{e^+e^- \\to {\\rm hadrons}}/\\sigma^0_{e^+e^- \\to \\mu^+\\mu^-}$) for inclusive hadronic event production at the center-of-mass energies of 3.650 GeV, 3.6648 GeV and 3.773 GeV. The results lead to $\\bar R_{uds}=2.224\\pm 0.019\\pm 0.089$ which is the average of these measured at 3.650 GeV and 3.6648 GeV, and $R=3.793\\pm 0.037 \\pm 0.190$ at $\\sqrt{s}=3.773$ GeV. We determined the lowest order cross section for $\\psi(3770)$ production to be $\\sigma^{\\rm B}_{\\psi(3770)} = (9.575\\p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0605105","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-ex/0605105/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"}