{"paper":{"title":"Study of B Decays to Charmonium States $B\\to \\eta_{c}K$ and $B\\to \\chi_{C0}K$","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"CLEO Collaboration, et al, K.W. Edwards","submitted_at":"2000-07-07T13:37:33Z","abstract_excerpt":"In a sample of $9.66\\times 10^6 B\\bar{B}$ pairs collected with the CLEO detector we make the first observation of B decays to an $\\eta_c$ and a kaon. We measure branching fractions $BR(B^+\\to\\eta_c K^+) = (0.69 + 0.26 - 0.21 +- 0.08 +- 0.20)\\times 10^{-3}$ and $BR(B^0\\to\\eta_c K^0) = (1.09 + 0.55 - 0.42 +- 0.12 +- 0.31)\\times 10^{-3}$, where the first error is statistical, the second is systematic and the third is from the $\\eta_c$ branching fraction uncertainty. From these we extract the $\\eta_c$ decay constant in the factorization approximation, $f_{\\eta_c} = 335 +- 75$ MeV. We also search f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/0007012","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/0007012/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"}