{"paper":{"title":"Search for charmonium and charmonium-like states in $\\Upsilon(1S)$ radiative decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-ex","authors_text":"C.P.Shen (for the Belle Collaboration)","submitted_at":"2010-08-10T19:11:36Z","abstract_excerpt":"Using a sample of 102 million $\\Upsilon(1S)$ events collected with the Belle detector, we report on the first search for charge-parity-even charmonium and charmonium-like states in $\\Upsilon(1S)$ radiative decays. No significant $\\chi_{cJ}$ or $\\eta_c$ signal is observed and 90% C.L. limits on $\\BR(\\Upsilon(1S)\\to \\gamma \\chi_{c0})<6.5 \\times 10^{-4}$, $\\BR(\\Upsilon(1S)\\to \\gamma \\chi_{c1})<2.3\\times 10^{-5}$, $\\BR(\\Upsilon(1S)\\to \\gamma \\chi_{c2})<7.6 \\times 10^{-6}$, and $\\BR(\\Upsilon(1S)\\to \\gamma \\eta_c)<5.7\\times 10^{-5}$ are obtained. The product branching fraction limits $\\BR(\\Upsilon(1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1008.1774","kind":"arxiv","version":3},"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/1008.1774/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"}