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 2002/11
形態種別 学術雑誌
標題 Study of exclusive B decays to charmed baryons
執筆形態 共著
掲載誌名 Phys. Rev. D 66, 091102(R) (2002) (5 pages)
概要 N. Gabyshev, H. Kichimi, S. Okuno, et al. [Belle Collaboration]
, Using 29.1fb-1 of data accumulated at the υ(4S) with the Belle detector at KEKB, we have studied the decay modes {B}0 → λc+{p} π+π-, B- → λc+{p} π-, and {B}0 → λc+{p}. We report branching fractions of exclusive B decays to charmed baryons with four-, three- and two-body final states, including intermediate σc++ and σc0 states. We observed {B}0 → σc(2455)++{p} π- for the first time with a branching fraction of (2.38-0.55+0.63±0.41±0.62)×10-4 and observed evidence for the two-body decay {B}- → σc(2455)0{p} with a branching fraction of (0.45-0.19+0.26±0.07±0.12)×10-4. We also set improved upper limits for the two-body decays {B}0 → λc+{p} and {B}- → σc(2520)0{p}.