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- W402725888 abstract "We have searched for B_{s}^{0}->hh decays, where h stands for a charged or neutral kaon, or a charged pion. These results are based on a 23.6 fb^{-1} data sample collected with the Belle detector on the Upsilon(5S) resonance at the KEKB asymmetric-energy e^{+}e^{-} collider, containing 1.25x10^6 B_{s}^{(*)}bar{B}_{s}^{(*)} events. We observe the decay B_{s}^{0}->K^{+}K^{-} and measure its branching fraction, mathcal{B}(B_{s}^{0}->K^{+}K^{-}) = [3.8_{-0.9}^{+1.0}(mathrm{stat})pm 0.5(mathrm{syst})pm 0.5(f_s)] times 10^{-5}. The first error is statistical, the second is systematic, and the third error is due to the uncertainty in the B^0_s production fraction in $e^+e^-to bbar{b}$ events. No significant signals are seen in other decay modes, and we set upper limits at 90% confidence level: mathcal{B}(B_{s}^{0}->K^-pi^{+})< 2.6 times 10^{-5}, mathcal{B}(B_{s}^{0}->pi^{+}pi^{-})< 1.2 times 10^{-5} and mathcal{B}(B_{s}^{0}->K^0bar{K}^0) < 6.6times 10^{-5}." @default.
- W402725888 created "2016-06-24" @default.
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