We report an analysis of charmless hadronic decays of neutral B mesons to the final state KsK+/-pi-/+, using a data sample of (465 +/- 5) x 10^6 BB-bar events collected with the BABAR detector at the Y(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 BF(B0 --> KsK+/-pi-/+) = (3.2 +/- 0.5 +/- 0.3) x 10^-6, where the uncertainties are statistical and systematic, respectively

Observation of the rare decay B0 --> KsK+-pi-+ / P. del Amo Sanchez, J.P. Lees, V. Poireau, E. Prencipe, V. Tisserand, J. Garra Tico, E. Grauges, M. Martinelli, A. Palano, M. Pappagallo, G. Eigen, B. Stugu, L. Sun, G.S. Abramsp, M. Battaglia, D.N. Brown, R.N. Cahn, R.G. Jacobsen, L.T. Kerth, Y.U.G. Kolomensky, G. Lynch, I.L. Osipenkov, M.T. Ronan, K. Tackmann, T. Tanabe, C.M. Hawkes, N. Soni, A.T. Watson, H. Koch, T. Schroeder, D. Walker, D.J. Asgeirsson, B.G. Fulsom, C. Hearty, T.S. Mattison, J.A. Mckenna, M. Barrett, A. Khan, V.E. Blinov, A.D. Bukin, A.R. Buzykaev, V.P. Druzhinin, V.B. Golubev, A.P. Onuchin, S.I. Serednyakov, Y.U.I. Skovpen, E.P. Solodov, K.Y. Todyshev, M. Bondioli, S. Curry, I. Eschrich, D. Kirkby, A.J. Lankford, P. Lund, M. Mandelkern, E.C. Martin, D.P. Stoker, S. Abachi, C. Buchanan, J.W. Gary, F. Liu, O. Long, B.C. Shen, G.M. Vitug, Z. Yasin, L. Zhang, V. Sharma, C. Campagnari, T.M. Hong, D. Kovalskyi, M.A. Mazur, J.D. Richman, T.W. Beck, A.M. Eisner, C.J. 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Observation of the rare decay B0 --> KsK+-pi-+

P. Biassoni;A. Lazzaro;F. Palombo;N. Neri;S. Stracka
2010

Abstract

We report an analysis of charmless hadronic decays of neutral B mesons to the final state KsK+/-pi-/+, using a data sample of (465 +/- 5) x 10^6 BB-bar events collected with the BABAR detector at the Y(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 BF(B0 --> KsK+/-pi-/+) = (3.2 +/- 0.5 +/- 0.3) x 10^-6, where the uncertainties are statistical and systematic, respectively
Decadimenti rari del B
Settore FIS/04 - Fisica Nucleare e Subnucleare
2010
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/151045
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