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 2001/03
形態種別 学術雑誌
標題 Measurement of the CP Violation Parameter sin2φ1 in Bd0! 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}sc1Ksc{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).