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 2002/12
形態種別 学術雑誌
標題 Measurement of the B0-{B}0 Mixing Parameter δ md using Semileptonic B0 Decays
執筆形態 共著
掲載誌名 Phys.Rev.Lett.89,251803(2002)(6pages)
概要 K.Hara,S.Okuno,et al.[Belle Collaboration],We present a measurement of the B0-{B}0 mixing parameter δmd using neutral B meson pairs in a 29.1 fb-1 data sample collected at the υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We exclusively reconstruct one neutral B meson in the semileptonic B0 → D*-L+ν decay mode and identify the flavor of the accompanying B meson from its decay products. From the distribution of the time intervals between the two flavor-tagged B meson decay points, we obtain δ md = (0.494±0.012±0.015) ps-1, where the first error is statistical and the second error is systematic.