6 Results from the Υ ( 5 S ) Engineering Run ( Belle )
نویسنده
چکیده
We report results based on a 1.86 fb −1 data sample collected on the Υ(5S) resonance by the Belle detector at the KEKB asymmetric energy e + e − collider. The inclusive production of Ds, D 0 and J/ψ mesons at the Υ(5S) is studied. From the Ds inclusive branching fraction the ratio fs = (16.4 ± 1.4 ± 4.1)% of B (*) s ¯ B (*) s to the total b ¯ b quark pair production at the Υ(5S) energy is obtained in a model dependent way. The exclusive decays Bs → D (*)+ s π − (/ρ −) and Bs → J/Ψφ(/η) are studied and a significant Bs signal is observed combining these modes. The Bs meson production is found to proceed predominantly through the creation of B (*)+ s D (*)− s decays are reported.
منابع مشابه
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