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	2001/03
形態種別	学術雑誌
標題	Measurement of the CP Violation Parameter sin2φ₁ in B_d⁰! Meson Decays
執筆形態	共著
掲載誌名	Physical Review Letters:Volume86,Issue 12
巻・号・頁	2509-2514頁
概要	A.Abashian,S.Okuno et al.［Belle Collaboration］,We present a measurement of the standard model CP violation parameter sin2φ₁(also known as sin2β)based on a 10.5fb^-1 data sample collected at the υ(4S)resonance with the Belle detector at the KEKB asymmentric e⁺e^- collider.One neutral B meson is reconstructed in the J/ψ{K}_s,ψ{(2S)K}_s,χ_c1K_s,η_c{K}_s,J/ψ{K}_L,or J/ψ!π⁰ CP-eigenstate decay channel and the flavor of the accompanying B meson is indentified from its charged particle decay products.From the asymmetry in the destribution of the time interval between the two B-meson decay points,we determine sin2φ₁=0.58_-0.34^+0.32(stat)_-0.10^+0.09(syst).