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Observation of B+/- -->omegaK+/- decay |
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| Authors: | Lu R-S Abe K Abe K Abe N Abe R Abe T Adachi I Aihara H Asano Y Aso T Aulchenko V Aushev T Bakich A M Ban Y Banas E Bedny I 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 Chen K-F Cheon B G Chistov R Choi S-K Choi Y Choi Y K Danilov M Dong L Y Drutskoy A Eidelman S Eiges V Everton C W Fukunaga C Gabyshev N Gershon T Golob B Gordon A Guo R Haba J Hara T Harada Y Hayashii H Hazumi M Heenan E M Higuchi T Hinz L Hokuue T Hoshi Y Hou W-S Hsu S-C Huang H-C Igaki T Igarashi Y Iijima T Inami K Ishikawa A Itoh R Iwasaki H Iwasaki Y Jang H K Kang J H |
| Affiliation: | National Taiwan University, Taipei. |
| Abstract: | We report the first observation of the charmless two-body mode B+/--->omegaK+/- decay, and a new measurement of the branching fraction for the B+/--->omegapi(+/-) decay. The measured branching fractions are B(B+/--->omegaK+/-)=(9.2(+2.6)(-2.3)+/-1.0)x10(-6) and B(B+/--->omegapi(+/-))=(4.2(+2.0)(-1.8)+/-0.5)x10(-6). We also measure the partial rate asymmetry of B+/--->omegaK+/- decays and obtain A(CP)=-0.21+/-0.28+/-0.03. The results are based on a data sample of 29.4 fb(-1) collected on the Upsilon(4S) resonance by the Belle detector at the KEKB e(+)e(-) collider. |
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