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 2004/04
形態種別 学術雑誌
査読 査読あり
標題 Observation of B+→ p{p}π+, B0→ p{p}K0, and B+→ p{p}K*+
執筆形態 共著
掲載誌名 Phys. Rev. Lett. 92, 131801 (2004) (6 pages)
著者・共著者 M.-Z. Wang, S. Okuno et al. [The Belle Collaboration]
概要 We report the first observation of a b → u type charmless baryonic B decay, B+→ p{p}π+, as well as b → s type B0 → p{p}K0 and B+ → p{p}K*+ decays. The analysis is based on a 78 fb-1 data sample recorded on the υ(4S) resonance with the Belle detector at KEKB. We find B({B}+ → p{p}π+) = (3.06+0.73-0.62±0.37)× 10-6, B(B0 → p{p}K0) = (1.88+0.77-0.60±0.23)× 10-6, and B({B}+ → p{p}K*+) = (10.3+3.6 +1.3-2.8 -1.7)× 10-6. We also update B({B}+ → p{p}K+) = (5.66+0.67-0.57±0.62)× 10-6 and present an upper limit on B(B0 → p{p}K*0) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.
,BELLE-75.