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• W2139605770 abstract "Using a sample of 9.7×106 BB¯ meson pairs collected with the CLEO detector, we study B decays to the χc1 and χc2 charmonia states, which are reconstructed via their radiative decays to J/ψ. We first measure the branching fraction for inclusive χc1 production in B decays to be B(B→χc1X)=(4.14±0.31±0.40)×10−3, where the first uncertainty is statistical and the second one is systematic. We derive the branching fractions for direct χc1 and χc2 production in B decays by subtracting the known contribution of the decay chain B→ψ(2S)X with ψ(2S)→χc1,2γ. We obtain B[B→χc1(direct)X]=(3.83±0.31±0.40)×10−3. No statistically significant signal for χc2 production is observed in either case. Using the Feldman-Cousins approach, we determine the 95% confidence intervals to be [0.2,2.0]×10−3 for B(B→χc2X), [0.0,1.7]×10−3 for B[B→χc2(direct)X], and [0.00,0.44] for the ratio Γ[B→χc2(direct)X]/Γ[B→χc1(direct)X]. We also measure the branching ratio Γ[B→χc2(direct)Xs]/Γ[B→χc1(direct)Xs] for different Xs configurations by reconstructing B decays into exclusive final states with J/ψ, γ, a kaon, and up to four pions. For all the Xs configurations, we observe a strong χc1 signal yet no statistically significant χc2 signal. We discuss how our results compare with theoretical predictions in different models of charmonium production.Received 19 September 2000DOI:https://doi.org/10.1103/PhysRevD.63.031102©2001 American Physical Society" @default.
• W2139605770 created "2016-06-24" @default.
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