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 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.