Observation of the rare decay B0 -> KS0K±π∓

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Gershon, T. J. ; Harrison, P. F. ; Ilić, Jelena ; Latham, Thomas ; Mohanty, G. B. ; Puccio, E. M. T. ; HASH(0x561a13731508) (2010)

We report an analysis of charmless hadronic decays of neutral B mesons to the final state (KSK +/-)-K-0 pi(-/+), using a data sample of (465 +/- 5) x 10(6) B (B) over bar events collected with the BABAR detector at the Gamma(4S) resonance. We observe an excess of signal events with a significance of 5.2 standard deviations including systematic uncertainties and measure the branching fraction to be B(B-0 -> (KSK +/-)-K-0 pi(-/+) (3.2 +/- 0.5 +/- 0.3) x 10(-6), where the uncertainties are statistical and systematic, respectively.
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    1Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP),

    Universit´e de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux, France

    2Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona, Spain

    3INFN Sezione di Baria; Dipartimento di Fisica, Universita` di Barib, I-70126 Bari, Italy

    4University of Bergen, Institute of Physics, N-5007 Bergen, Norway

    5Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720, USA

    6University of Birmingham, Birmingham, B15 2TT, United Kingdom

    7Ruhr Universita¨t Bochum, Institut fu¨r Experimentalphysik 1, D-44780 Bochum, Germany

    8University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1

    9Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom

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