## Abstract

Using samples of 102×106 Υ(1S) and 158×106 Υ(2S) events collected with the Belle detector, we study exclusive hadronic decays of these two bottomonium resonances to the three-body final states Ï•K ^{+}K ^{-}, ωπ ^{+}π ^{-} and K ^{*}0(892)K ^{-}π ^{+}, and to the two-body Vector-Tensor states (Ï•f2′(1525), ωf _{2}(1270), ρa _{2}(1320) and K ^{*}0(892)K̄2*0(1430)) and Axial-vector-Pseudoscalar (K _{1}(1270) ^{+}K ^{-}, K _{1}(1400) ^{+}K ^{-} and b _{1}(1235) ^{+}π ^{-}) states. Signals are observed for the first time in the Υ(1S)→Ï•K ^{+}K ^{-}, ωπ ^{+}π ^{-}, K ^{*}0K ^{-}π ^{+}, K ^{*}0K2*0 and Υ(2S)→Ï•K ^{+}K ^{-}, K ^{*}0K ^{-}π ^{+} decay modes. Branching fractions are determined for all the processes, while 90% confidence level upper limits are established on the branching fractions for the modes with a statistical significance less than 3σ. The ratios of the branching fractions of Υ(2S) and Υ(1S) decays into the same final state are used to test a perturbative QCD prediction for OZI-suppressed bottomonium decays.

Original language | English |
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Article number | 031102 |

Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |

Volume | 86 |

Issue number | 3 |

DOIs | |

Publication status | Published - 2012 Aug 15 |

## All Science Journal Classification (ASJC) codes

- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)