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Observation of D+(s)K- and evidence for D+(s)pi- final states in neutral B decays |
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| Authors: | Krokovny P Abe K Abe K Abe T Adachi I Ahn Byoung Sup Aihara H Akatsu M Asano Y Aso T Aulchenko V Aushev T Bakich A M Ban Y Banas E Bay A Bedny I Behera P K Bizjak I Bondar A Bozek A Bracko M Brodzicka J Browder T E Casey B C K Chang P Chao Y Chen K-F Cheon B G Chistov R Choi S-K Choi Y Danilov M Dong L Y Drutskoy A Eidelman S Eiges V Enari Y Everton C W Fang F Fukunaga C Gabyshev N Garmash A Gershon T Golob B Gordon A Guo R Haba J Hanagaki K Handa F Harada Y Hayashii H Hazumi M Heenan E M Higuchi T Hinz L Hojo T Hokuue T Hoshi Y Hou W-S Huang H-C Igaki T Iijima T Inami K Ishikawa A Ishino H |
| Affiliation: | Budker Institute of Nuclear Physics, Novosibirsk. |
| Abstract: | We report the first observation of a B meson decay that is not accessible by a direct spectator process. The channel B(0)-->D(+)(s)K- is found in a sample of 85 x 10(6) BB; events, collected with the Belle detector at KEKB, with a branching fraction B(B(0)-->D(+)(s)K-)=(4.6(+1.2)(-1.1)+/-1.3) x 10(-5). We also obtain evidence for the B0-->D(+)(s)pi(-) decay with branching fraction B(B0-->D(+)(s)pi(-))=(2.4(+1.0)(-0.8)+/-0.7) x 10(-5). This value may be used to extract a model-dependent value of |V(ub)|. |
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