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	2003/02
形態種別	学術雑誌
標題	Study of {B⁰} → D^(*)0 π⁺ π^- Decays
執筆形態	共著
掲載誌名	Phys.Lett.B553（2003）
巻・号・頁	159-166頁
概要	A.Satpathy，S.Okuno，et al.［Belle Collaboration］，We report on a study of {B⁰} → D^{() 0} π⁺ π^- decays using 29.1 fb^-1 of e⁺e^- annihilation data recorded at the υ(4S) resonance with the Belle detector at the KEKB storage ring. Making no assumptions about the intermediate mechanism, the branching fractions for {B}⁰ → D⁰ π⁺ π^- and {B}⁰ → D^{ 0} π⁺ π^- are determined to be (8.0 ± 0.6 ± 1.5) × 10^-4 and (6.2 ± 1.2 ± 1.8) × 10^-4, respectively. An analysis of {B⁰} → D⁰ π⁺ π^- candidates yields to the first observation of the color-suppressed hadronic decay {B}⁰ → D⁰ ρ⁰ with the branching fraction (2.9 ± 1.0 ± 0.4) ×10^-4. We measure the ratio of branching fractions B({B⁰} → D⁰ ρ⁰) / B({B⁰} → D⁰ ω) = 1.6 ± 0.8.