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 2002/01
形態種別 学術雑誌
標題 Observation of
Cabibbo-suppressed and
W-exchange λ+c baryon decays
執筆形態 共著
掲載誌名 Physics Letters B: Volume 524(1-2), (2002)
巻・号・頁 33-43頁
概要 K. Abe, S. Okuno, et al. [Belle Collaboration],We
present measurements of the Cabibbo-suppressed decays λ+c → λ0K+ and λ+c → σ0K+ (both first observations), λ+c → σ+K+π- (seen with large statistics for the first time), λ+cpK+K- and λ+cpφ (measured with improved accuracy). Improved branching ratio measurements for the decays λ+c → σ+K+K- and λ+c → σ+φ, which are attributed to W-exchange diagrams, are shown. ~ We also present the first evidence for λ+c → ξ(1690)0K+ and set an upper limit on the non-resonant decay λ+c → σ+K+K-. This analysis was performed using 32.6fb-1 of data collected by the Belle detector at the asymmetric e+e- collider KEKB.