Search for Bs0hh decays at the Υ(5S) resonance

C.-C. Peng et al. (The Belle Collaboration)
Phys. Rev. D 82, 072007 – Published 15 October 2010


We have searched for Bs0hh decays, where h stands for a charged or neutral kaon, or a charged pion. These results are based on a 23.6fb1 data sample collected with the Belle detector on the Υ(5S) resonance at the KEKB asymmetric-energy e+e collider, containing 1.25×106 Bs(*)B¯s(*) events. We observe the decay Bs0K+K and measure its branching fraction, B(Bs0K+K)=[3.80.9+1.0(stat)±0.5(syst)±0.5(fs)]×105. The first error is statistical, the second is systematic, and the third error is due to the uncertainty in the Bs0 production fraction in e+ebb¯ events. No significant signals are seen in other decay modes, and we set upper limits at the 90% confidence level: B(Bs0Kπ+)<1.2×105, B(Bs0π+π)<2.6×105, and B(Bs0K0K¯0)<6.6×105.

  • Figure
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  • Received 26 June 2010


© 2010 The American Physical Society

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Vol. 82, Iss. 7 — 1 October 2010

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