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Evidence for B-->eta'pi and improved measurements for B-->eta'K |
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| Authors: | Schümann J Wang C H Abe K Adachi I Aihara H Anipko D Arinstein K Asano Y Aushev T Bakich A M Balagura V Barberio E Barbero M Bay A Bedny I Bitenc U Bizjak I Blyth S Bondar A Bozek A Bracko M Browder T E Chang M-C Chang P Chao Y Chen A Chen W T Cheon B G Choi Y Choi Y K Chuvikov A Cole S Dalseno J Danilov M Dash M Dragic J Drutskoy A Eidelman S Epifanov D Fratina S Gabyshev N Gershon T Go A Gokhroo G Golob B Gorisek A Ha H C Haba J Hara T Hastings N C Hayasaka K Hayashii H Hazumi M Hinz L Hokuue T Hoshi Y Hou S Hou W-S Hsiung Y B Iijima T Imoto A Inami K Ishikawa A Itoh R Iwasaki M Iwasaki Y |
| Affiliation: | National United University, Miao Li. |
| Abstract: | We report evidence for the exclusive two-body charmless hadronic B meson decay B-->eta'pi, and improved measurements of B-->eta'K. The results are obtained from a data sample of 386x10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure B(B+-->eta'pi+)=[1.76(-0.62)(+0.67)(stat)(-0.14)(+0.15)(syst)]x10(-6) and B(B0-->eta'pi0)=[2.79(-0.96)(+1.02)(stat)(-0.34)(+0.25)(syst)]x10(-6). We also find the ratio of B(B+-->eta'K+)/B(B0-->eta'K0)=1.17+/-0.08(stat)+/-0.03(syst) and measure the direct CP asymmetries for the charged modes. |
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