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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"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1108.4514","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-ex","submitted_at":"2011-08-23T07:51:21Z","cross_cats_sorted":[],"title_canon_sha256":"e694546c765c71b38bde73f2e39af27dfeaee610b1353a1a04f431f09d9c379f","abstract_canon_sha256":"63736833645cefb20aa8761a2d6407b1f51eefcd41b4dfb66f685020f301b754"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:08:44.464163Z","signature_b64":"5YNJx4rTb9FH3KSSh7uPUPI8gzAixvtC+AH3HakGzsDftI7epfx393nJdBFFybowjesl104HnwHDPdkVYAT2CQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a05574a2f157d513eb2f79d5360f149fbe5da756d1cab96c9902e2b44ee1eb56","last_reissued_at":"2026-05-18T04:08:44.463757Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:08:44.463757Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"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. 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