Study of χc1 and χc2 meson production in B meson decays CLEO Collaboration
نویسندگان
چکیده
Using a sample of 9.7×10 BB meson pairs collected with the CLEO detector, we study inclusive B meson decays to the χc1 and χc2 charmonia states. We measure the branching fraction for the inclusive χc1 production in B decays to be B(B → χc1X) = (4.14± 0.31± 0.40)× 10 , where the first uncertainty is statistical and the second one is systematic. We obtain the branching fractions for direct χc1 and χc2 production in B decays by subtracting the contribution from the decay chain B → ψ(2S)X with ψ(2S) → χc1,2γ. We measure 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. We determine the 95% C.L. upper limits to be B(B → χc2X) < 2.0 × 10 , B(B → χc2[direct]X) < 1.7 × 10 , and B(B → χc2[direct]X)/B(B → χc1[direct]X) < 0.44. All quoted results are preliminary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Submitted to XXXth International Conference on High Energy Physics, July 2000, Osaka, Japan
منابع مشابه
Study of χ c 1 and χ c 2 meson production in B meson decays
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تاریخ انتشار 2000