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オクノ ショウジ
Okuno Shoji 奥野 祥二 所属 神奈川大学 情報学部 システム数理学科 職種 助教 |
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言語種別 | 日本語 |
発行・発表の年月 | 2002 |
形態種別 | 学術雑誌 |
標題 | Measurement of B({B}0 → D+L-{ν}) and Determination of |Vcb| |
執筆形態 | 共著 |
掲載誌名 | Physics Letters B: Volume 526(3-4), (2002) |
巻・号・頁 | 258-268頁 |
概要 | K. Abe, S. Okuno, et al. [Belle Collaboration] ,We present a measurement of the branching fraction for the semileptonic B decay {B}0 → D+L-{ν}, where can be either an electron or a muon. We find γ({B}0 → D+L-{ν}) = (13.79±0.76±2.51)ns-1, and the resulting branching fraction B({B}0 → D+L-{ν}) = (2.13±0.12±0.39)%, where the first error is statistical and the second systematic. We also investigate the {B}0 → D+L-{ν} form factor and the implications of the result for |Vcb|. From a fit to the differential decay distribution we obtain the rate normalization |Vcb|FD(1) = (4.11±0.44±0.52) × 10-2. Using a theoretical calculation of FD(1), the Cabibbo-Kobayashi-Maskawa matrix element |Vcb| = (4.19±0.45±0.53±0.30) × 10-2 is obtained, where the last error comes from the theoretical uncertainty of FD(1). The results are based on a data sample of 10.2fb-1 recorded at the υ(4S) resonance with the Belle detector at the KEKB e+e- collider. |