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Measurement of branching fractions and polarization in B-->phiK(*) decays |
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| Authors: | Chen K-F Bozek A Abe K Abe K Abe T Adachi I Aihara H Akatsu M Asano Y Aso T Bakich A M Ban Y Banas E Bay A Behera P K Bizjak I Bondar A Bracko M Brodzicka J Browder T E Casey B C K Chang M-C Chang P Chao Y Cheon B G Chistov R Choi S-K Choi Y Choi Y K Danilov M Dash M Dong L Y Drutskoy A Eidelman S Eiges V Enari Y Fukunaga C Gabyshev N Garmash A Gershon T Golob B Guo R Haba J Hagner C Handa F Hayashii H Hazumi M Higuchi T Hinz L Hokuue T Hoshi Y Hou W-S Hsiung Y B Huang H-C Igarashi Y Iijima T Inami K Ishikawa A Ishino H Itoh R Iwasaki H Iwasaki Y Jang H K Jones M Kang J H Kang J S Katayama N |
| Institution: | Department of Physics, National Taiwan University, Taipei. |
| Abstract: | We present the first measurement of decay amplitudes in B-->phiK* and measurements of branching fractions in B-->phiK(*) decays based on 78.1 fb(-1) of data recorded at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e- storage ring. The decay amplitudes for the different phiK*0 helicity states are measured from the angular distributions of final state particles in the transversity basis. The longitudinal and transverse complex amplitudes are |A0|2=0.43+/-0.09+/-0.04, |A(perpendicular)|2=0.41+/-0.10+/-0.04, arg((A(parallel))=-2.57+/-0.39+/-0.09, and arg((A(perpendicular))=0.48+/-0.32+/-0.06. The direct CP-violating asymmetries are found to be consistent with zero. |
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