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 2003/09
形態種別 学術雑誌
査読 査読あり
標題 Measurement of branching fraction ratios and CP asymmetries in B± → DCPK±
執筆形態 共著
掲載誌名 Phys. Rev. D 68, 051101(R) (2003) (6 pages)
著者・共著者 S. K. Swain, T. E. Browder,
S.Okuno, et al. [BELLE Collaboration],
概要 S. K. Swain, T. E. Browder,
S.Okuno, et al. [BELLE Collaboration],
We report results on the decay B- → DCPK- and its charge conjugate using a data sample of 85.4 × 106 BB pairs recorded at the υ(4S) resonance with the Belle detector at the KEKB asymmetric e+e- storage ring. Ratios of branching fractions of Cabibbo-suppressed to Cabibbo-favored processes are determined to be B(B- → D0K-)/B(B- → D0π-) = 0.077±0.005(stat)±0.006(syst), B(B- → D1K-)/B(B- → D1π-) = 0.093±0.018(stat)±0.008(syst) and B(B- → D2K-)/B(B- → D2π-) = 0.108±0.019(stat)±0.007(syst) where the indices 1 and 2 represent the CP = +1 and CP = -1 eigenstates of the D0-D0 system, respectively. We find the partial-rate charge asymmetries for B- → DCPK- to be A1 = 0.06±0.19(stat)±0.04(syst) and A2 = -0.19±0.17(stat)±0.05(syst).