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 2003/03
形態種別 学術雑誌
標題 Studies of B0-{B}0 mixing properties with inclusive dilepton events
執筆形態 共著
掲載誌名 Phys.Rev.D 67,052004(2003)(7 pages)
概要 N.C.Hastings,S.Okuno,et al.[Belle Collaboration],We report a precise determination of the B0-{B}0 mixing parameter δ md based on the time evolution of same-sign and opposite-sign dilepton yields in υ(4S) decays. Data were collected with the Belle detector at KEKB. Using data samples of 29.4 fb-1 recorded at the υ(4S) resonance and 3.0 fb-1 recorded at an energy 60 MeV below the resonance, we measure δ md = [0.503±0.008(stat)±0.010(syst)] ps-1. From the same analysis, we also measure the ratio of charged and neutral B meson production at the υ(4S), f+/f0 = 1.01±0.03(stat)±0.09(syst), and CPT violation parameters in B0-{B}0 mixing, R(cos θ) = 0.00±0.12(stat)±0.01(syst) and I(cos θ) = 0.03±0.01(stat)±0.03(syst).