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Studies of the decay B+/- -->D(CP)K+/- |
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| Authors: | Abe K Abe K Abe N Abe R Abe T Ahn Byoung Sup Aihara H Akatsu M Asano Y Aso T Aulchenko V Aushev T Bakich A M Ban Y Behera P K Bizjak I Bondar A Bozek A Bracko M Browder T E Casey B C K Chang M-C Chang P Chao Y Cheon B G Chistov R Choi Y Choi Y K Danilov M Dong L Y Drutskoy A Eidelman S Eiges V Enari Y Fang F Fujii H Fukunaga C Gabyshev N Garmash A Gershon T Golob B Gordon A Guo R Haba J Hara T Harada Y Hayashii H Hazumi M Heenan E M Higuchi I Higuchi T Hinz L Hokuue T Hoshi Y Hou S R Hou W-S Hsu S-C Huang H-C Igaki T Igarashi Y Iijima T Inami K Ishikawa A Ishino H Itoh R Iwasaki H Iwasaki Y |
| Institution: | High Energy Accelerator Research Organization (KEK), Tsukuba. |
| Abstract: | We report studies of the Cabibbo-suppressed decay B+/--->D(CP)K+/-, where D(CP) denotes CP eigenstates of the D0-D0; system. The analysis is based on a 29.1 fb(-1) sample collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric e(+)e(-) storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B+/--->D(CP)pi(+/-), of B(B--->D1K-)/B(B--->D1pi(-))=0.125+/-0.036+/-0.010 and B(B--->D2K-)/B(B--->D2pi(-))=0.119+/-0.028+/-0.006; the index 1 (2) denotes the CP=+1 (-1) eigenstate. We also extract the partial rate asymmetries for B+/--->D(CP)K+/-, finding A(1)=0.29+/-0.26+/-0.05 and A(2)=-0.22+/-0.24+/-0.04. |
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