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 2002/04
形態種別 学術雑誌
標題 Measurement of Lifetime Difference in D0 Meson Decays
執筆形態 共著
掲載誌名 Physical Review Letters:Volume88, 162001 (2002)
概要 K. Abe, S. Okuno, et al. [Belle Collaboration],We
report a measurement of the D0{D}0 mixing parameter yCP using 23.4fb-1 of data collected near the υ(4S) resonance with the Belle detector at KEKB. yCP is measured from the lifetime difference of D0 mesons decaying into the K-π+ state and the CP-even eigenstate K-K+. We find yCP = (-0.5 ± 1.0+0.7-0.8) × 10-2, where the first error is statistical and the second is systematic, corresponding to a 95% confidence interval -0.030 < yCP < 0.020.