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	2002/02
形態種別	学術雑誌
標題	Observation of Color-suppressed =B⁰ → D⁰π⁰
執筆形態	共著
掲載誌名	Physical Review Letters:Volume88, 052002 (2002)
概要	K. Abe, S. Okuno, et al. [Belle Collaboration] , We report the first observation of color-suppressed {B}⁰ → D⁰π⁰, D^0π⁰, D⁰η, and D⁰ω decays, and evidence for {B}⁰* → D^0η and D^0ω. The branching fractions are B({B}⁰ → D⁰π⁰) = (3.1±0.4±0.5) × 10^-4,B({B}⁰ → D^0π⁰) = (2.7^+0.8+0.5_-0.7-0.6) × 10^-4, B({B}⁰* → D⁰η) = (1.4^+0.5_-0.4±0.3) × 10^-4, B({B}⁰ → D⁰ω) = (1.8±0.5^+0.4_-0.3) × 10^-4, and we set 90% confidence level upper limits of B({B}⁰ → D^0η) ＜ 4.6 × 10^-4 and B({B}⁰* → D^0ω) ＜ 7.9 × 10^-4. The analysis is based on a data sample of 21.3fb^-1 collected at the υ(4S) resonance by the Belle detector at the KEKB e⁺e^-*collider.