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	2003/04
形態種別	学術雑誌
査読	査読あり
標題	Studies of the Decay B^± → D_CPK^±
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^± → D_CPK^±, where D_CP 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^± → D_CPπ^±, 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^± → D_CPK^±, finding A₁ = 0.29±0.26±0.05 and A₂ = -0.22±0.24±0.04.