研究者情報 | 神奈川大学

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
言語種別	日本語
発行・発表の年月	2002/11
形態種別	学術雑誌
標題	Measurement of the inclusive semileptonic branching fraction of B mesons and \|V_cb\|
執筆形態	共著
掲載誌名	Phys.Lett. B547 (2002)
巻・号・頁	181-192頁
概要	K. Abe, S. Okuno, et al. [Belle Collaboration] , We present a measurement of the electron spectrum from inclusive semileptonic B decay, using 5.1fb^-1 of υ(4S) data collected with the Belle detector. A high-momentum lepton tag was used to separate the semileptonic B decay electrons from secondary decay electrons. We obtained the branching fraction, B(B → Xe⁺ν)=(10.90±0.12±0.49)%, with minimal model dependence. From this measurement, we derive a value for the Cabibbo-Kobayashi-Maskawa matrix element \|V_cb\| = 0.0408±0.0010(exp)±0.0025(th).