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Radiative B meson decays into kpigamma and kpipigamma final states |
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| Authors: | Nishida S Nakao M Abe K Abe K Abe T Ahn Byoung Sup Aihara H Akatsu M Asano Y Aushev T Bakich A M Ban Y Banas E Bartel W Bay A Bedny I Bondar A Bozek A Bracko M Brodzicka J Browder T E Casey B C K Chang P Chao Y Cheon B G Chistov R Choi S-K Choi Y Danilov M Dong L Y Drutskoy A Eidelman S Eiges V Enari Y Fukunaga C Gabyshev N Gershon T Gordon A Gotow K Guo R Haba J 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 Hsu S-C Huang H-C Igaki T Iijima T Inami K Ishikawa A Ishino H Itoh R Iwamoto M Iwasaki H Iwasaki Y Jalocha P Jang H K Kang J H |
| Affiliation: | Kyoto University, Kyoto. |
| Abstract: | We report observations of radiative B meson decays into the K+pi(-)gamma and K+pi(-)pi(+)gamma final states. In the B0-->K+pi(-)gamma channel, we present evidence for decays via an intermediate tensor meson state with a branching fraction of B(B0-->K(*)(2)(1430)(0)gamma)=[1.3+/-0.5(stat)+/-0.1(syst)]x10(-5). We measure the branching fraction B(B+-->K+pi(-)pi(+)gamma)=[2.4+/-0.5(stat) +0.4-0.2(syst)]x10(-5), in which the B+-->K(*0)pi(+)gamma and B+-->K+rho(0)gamma channels dominate. The analysis is based on a data set of 29.4 fb(-1) recorded by the Belle experiment at the KEKB collider. |
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