{"paper":{"title":"Measurement of Cross Sections for $D^0 {\\bar D}^0$ and $D^+D^-$ Production in $e^+e^-$ Annihilation at $\\sqrt{s}=3.773$ GeV","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"BES Collaboration","submitted_at":"2004-11-02T10:57:26Z","abstract_excerpt":"The cross sections for $D^0 {\\bar D}^0$ and $D^+D^-$ production at 3.773 GeV have been measured with BES-II detector at BEPC. These measurements are made by analyzing a data sample of about 17.3 $\\rm pb^{-1}$ collected at the center-of-mass energy of 3.773 GeV. Observed cross sections for the charm pair production are radiatively corrected to obtain the tree level cross section for $D\\bar D$ production. A measurement of the total tree level hadronic cross section is obtained from the tree level $D \\bar D$ cross section and an extrapolation of the $R_{uds}$ below the open charm threshold."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0411013","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"}