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	Observation of {B}⁰ → D⁰ {K}⁰ and {B}⁰ → D⁰ {K}^*0 Decays
執筆形態	共著
掲載誌名	Phys.Rev.Lett.90，141802（2003）(6pages)
著者・共著者	P.Krokovny，S.Okuno，et al.［Belle Collaboration］，
概要	P.Krokovny，S.Okuno，et al.［Belle Collaboration］，We report on a search for {B}⁰ → D^()0{K}^()0 decays based on 85×10⁶ B{B} events collected with the Belle detector at KEKB. The {B}⁰ → D⁰{K}⁰ and {B}⁰ → D⁰{K}^0 decays have been observed for the first time with the branching fractions B({B}⁰ → D⁰{K}⁰) = (5.0_-1.2^+1.3±0.6)×10^-5 and B({B}⁰ → D⁰{K}^0) = (4.8_-1.0^+1.1±0.5)×10^-5. No significant signal has been found for the {B}⁰ → D^0{K}^()0 and {B}⁰ → {D}^()0{K}^0 decay modes, and upper limits at 90% C.L. are presented.