研究者情報 | 神奈川大学

オクノ　ショウジ Okuno Shoji 奥野　祥二所属神奈川大学情報学部システム数理学科職種助教
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.