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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 |
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言語種別 | 日本語 |
発行・発表の年月 | 2003/04 |
形態種別 | 学術雑誌 |
査読 | 査読あり |
標題 | Studies of the Decay B± → DCPK± |
執筆形態 | 共著 |
掲載誌名 | Phys. Rev. Lett. 90, 131803 (2003)(5pages) |
著者・共著者 | K. Abe, S. Okuno, et al. [Belle Collaboration] |
概要 | K. Abe, S. Okuno, et al. [Belle Collaboration]
, We report studies of the Cabibbo-suppressed decay B± → DCPK±, where DCP denotes CP eigenstates of the D0-{D}0 system. The analysis is based on a 29.1 fb-1 sample collected at the υ(4S) resonance with the Belle detector at the KEKB asymmetric e+e- storage ring. We measure ratios of branching fractions, relative to Cabibbo-favored B± → DCPπ±, of B(B- → D1K-)/B(B- → D1π-) = 0.125±0.036±0.010 and B(B- → D2K-)/B(B- → D2π-) = 0.119±0.028±0.006; the index 1 (2) denotes the CP = +1 (-1) eigenstate. We also extract the partial rate asymmetries for B± → DCPK±, finding A1 = 0.29±0.26±0.05 and A2 = -0.22±0.24±0.04. |