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Observation of B(+/-) --> p(-)pK(+/-) |
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| Authors: | Abe K Abe K Abe R 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 Behari S Behera P K 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 Dragic J Drutskoy A Eidelman S Eiges V Enari Y Everton C W Fang F Fujii H Fukunaga C Fukushima M Gabyshev N Garmash A Gershon T Gotow K Guo R Haba J Hamasaki H Handa F Hara K Hara T Hayashii H Hazumi M Heenan E M Higuchi I Higuchi T Hojo T Hokuue T Hoshi Y Hou S R Hou W-S Huang H-C Igaki T Igarashi Y Iijima T |
| Affiliation: | Aomori University, Aomori, Japan. |
| Abstract: | We report the observation of the decay mode B(+/-) --> p(-)pK(+/-)based on an analysis of 29.4 fb(-1) of data collected by the Belle detector at KEKB. This is the first example of a b-->s transition with baryons in the final state. The p(-)p mass spectrum in this decay is inconsistent with phase space and is peaked at low mass. The branching fraction for this decay is measured to be B(B+/--->p(-)pK+/-) = [4.3(+1.1)(-0.9)(stat)+/-0.5(syst)]x 10(-6). We also report upper limits for the decays B(0)-->p(-)pK(S) and B(+/-)-->p(-)p pi(+/-). |
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