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Measurement of the CP asymmetry and branching fraction of B0-->rho0K0 |
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| Authors: | Aubert B Barate R Bona M Boutigny D Couderc F Karyotakis Y Lees J P Poireau V Tisserand V Zghiche A Grauges E Palano A Chen J C Qi N D Rong G Wang P Zhu Y S Eigen G Ofte I Stugu B Abrams G S Battaglia M Brown D N Button-Shafer J Cahn R N Charles E Gill M S Groysman Y Jacobsen R G Kadyk J A Kerth L T Kolomensky Yu G Kukartsev G Lynch G Mir L M Orimoto T J Pripstein M Roe N A Ronan M T Wenzel W A del Amo Sanchez P Barrett M Ford K E Harrison T J Hart A J Hawkes C M Morgan S E Watson A T Held T Koch H Lewandowski B Pelizaeus M Peters K Schroeder T Steinke M Boyd J T Burke J P Cottingham W N |
| Affiliation: | Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux, France. |
| Abstract: | We present a measurement of the branching fraction and time-dependent CP asymmetry of B(0)-->rho0K0. The results are obtained from a data sample of 227x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector at the PEP-II asymmetric-energy B factory at Stanford Linear Accelerator Center. From a time-dependent maximum likelihood fit yielding 111+/-19 signal events, we find B(B(0)-->rho0K0)=(4.9+/-0.8+/-0.9)x10(-6), where the first error is statistical and the second systematic. We report the measurement of the CP parameters S(rho)(0)K(0)S=0.20+/-0.52+/-0.24 and C(rho)(0)K(0)S=0.64+/-0.41+/-0.20. |
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