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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 | 2003/01 |
| 形態種別 | 学術雑誌 |
| 標題 | Measurement of the Electroweak Penguin Process B → Xs L+ L- |
| 執筆形態 | 共著 |
| 掲載誌名 | Phys. Rev. Lett. 90, 021801 (2003)(6pages) |
| 概要 | J. Kaneko, S. Okuno, et al. [Belle Collaboration]
, We report the first measurement of the branching fraction for the inclusive decay B → XsL+L-, where L is either an electron or a muon, and Xs is a hadronic recoil system that contains an s quark. We analyzed a data sample of 65.4×106B meson pairs collected with the Belle detector at the KEKB e+e- asymmetric-energy collider. We find B(B → XsL+L-) = [6.1 ± 1.4(stat) -1.1+1.4(syst)]×10-6 for dilepton masses greater than 0.2 GeV/c2. |
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