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	2001/10
形態種別	学術雑誌
標題	Measurements of the Branching Fraction for B → η^’K and Search for B → η^’π⁺
執筆形態	共著
掲載誌名	Physics Letters B: Volume 517 (3-4), (2001)
巻・号・頁	309-318頁
概要	K. Abe, S. Okuno, et al. [Belle Collaboration] , We report measurements for two-body charmless hadronic B decays with an η^’ meson in the final state. Using 11.1 × 10⁶B{B} pairs collected with the Belle detector, we find BF(B⁺ → η^’K⁺) = (79⁺¹²_-11 ± 9) × 10^-6 and BF(B⁰ → η^’K⁰) = (55⁺¹⁹_-16± 8) × 10^-6, where the first and second errors are statistical and systematic, respectively. No signal is observed in the mode B⁺ → η^’π⁺, and we set a 90% confidence level upper limit of BF(B⁺ → η^’π⁺) < 7×10^-6. The CP asymmetry in B^± → η^’K^± decays is investigated and a limit at 90% confidence level of 0.20 < A_CP < 0.32 is obtained.