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 2002/05
形態種別 学術雑誌
標題 Observation of B± → p{p} K±
執筆形態 共著
掲載誌名 Phys. Rev. Lett. 88, 181803 (2002)(5pages)
概要 K. Abe, S. Okuno, et al. [Belle Collaboration]
, We report the observation of the decay mode B± → ppK± based on an analysis of 29.4 fb-1 of data collected by the Belle detector at KEKB. This is the first example of a b → s transition with baryons in the final state. The pp mass spectrum in this decay is inconsistent with phase space and is peaked at low mass. The branching fraction for this decay is measured to be B(B± → pp K±) = [4.3+1.1-0.9 (stat)±0.5 (syst)]×10-6. We also report upper limits for the decays B0 → p{p}KS and B± → ppπ±.