{"paper":{"title":"Search for charmonium and charmonium-like states in \\Upsilon(2S) radiative decays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"Belle Collaboration, C. P. Shen, C. Z. Yuan, et al, P. Wang, X. L. Wang","submitted_at":"2011-08-23T07:51:21Z","abstract_excerpt":"Using a sample of 158 million \\Upsilon(2S) events collected with the Belle detector, charmonium and charmonium-like states with even charge parity are searched for in \\Upsilon(2S) radiative decays. No significant \\chi_{cJ} or \\eta_c signal is observed and the following upper limits at 90% confidence level (C.L.) are obtained: BR(\\Upsilon(2S)\\to \\gamma \\chi_{c0})< 1.0 \\times 10^{-4}, BR(\\Upsilon(2S) \\to \\gamma \\chi_{c1})<3.6 \\times 10^{-6}, BR(\\Upsilon(2S) \\to \\gamma \\chi_{c2})<1.5 \\times 10^{-5}, and BR(\\Upsilon(2S) \\to \\gamma \\eta_c)< 2.7 \\times 10^{-5}. No significant signal of any charmoniu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1108.4514","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"}