オクノ ショウジ   Okuno Shoji
  奥野 祥二
   所属   神奈川大学  工学部 情報システム創成学科
   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.