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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 | 2003/02 |
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. |