Search for Resonant B ± → K ± h → K ± γγ Decays at Belle Belle Collaboration
نویسندگان
چکیده
We report measurements and searches for resonant B → Kh → Kγγ decays where h is a η, η, ηc, ηc(2S), χc0, χc2, J/ψ meson or the X(3872) particle. The results are based on a data sample containing 535 million BB pairs collected with the Belle detector at the KEKB ee asymmetric-energy collider operating at the Υ(4S) resonance. Signals are observed in the modes with η and η, and we obtain evidence for a signal in the mode with ηc. We measure B(B → Kη → Kγγ) = (0.87 −0.15(stat) +0.10 −0.07(syst)) × 10, B(B → Kη → Kγγ) = (1.40 −0.15(stat) +0.15 −0.12(syst))× 10 and B(B → Kηc → Kγγ) = (0.22 −0.07(stat) +0.04 −0.02(syst)) × 10. We set upper limits on the branching fractions of the other modes.
منابع مشابه
Search for Resonant B ± → K ± h → K ± γγ Decays at Belle Belle
We report measurements and searches for resonant B → Kh → Kγγ decays where h is a η, η, ηc, ηc(2S), χc0, χc2, J/ψ meson or the X(3872) particle. The results are based on a data sample containing 535 million BB pairs collected with the Belle detector at the KEKB ee asymmetric-energy collider operating at the Υ(4S) resonance. Signals are observed in the modes with η and η, and we obtain evidence ...
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تاریخ انتشار 2007