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	2002/01
形態種別	学術雑誌
標題	Observation of Cabibbo-suppressed and W-exchange λ⁺_c baryon decays
執筆形態	共著
掲載誌名	Physics Letters B: Volume 524(1-2), (2002)
巻・号・頁	33-43頁
概要	K. Abe, S. Okuno, et al. [Belle Collaboration],We present measurements of the Cabibbo-suppressed decays λ⁺_c → λ⁰K⁺ and λ⁺_c → σ⁰K⁺ (both first observations), λ⁺_c → σ⁺K⁺π^- (seen with large statistics for the first time), λ⁺_c → pK⁺K^- and λ⁺_c → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays λ⁺_c → σ⁺K⁺K^- and λ⁺_c → σ⁺φ, which are attributed to W-exchange diagrams, are shown. ~ We also present the first evidence for λ⁺_c → ξ(1690)⁰K⁺ and set an upper limit on the non-resonant decay λ⁺_c → σ⁺K⁺K^-. This analysis was performed using 32.6fb^-1 of data collected by the Belle detector at the asymmetric e⁺e^- collider KEKB.