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 2002/11
形態種別 学術雑誌
標題 Observation of B± → ω K± Decay
執筆形態 共著
掲載誌名 Phys.Rev.Lett.89,191801(2002)(6pages)
概要 R.-S.Lu,S.Okuno,et al.[Belle Collaboration],We report the first observation of the charmless two-body mode B±→ ω K± decay, and a new measurement of the branching fraction for the B± → ωπ± decay. The measured branching fractions are B(B± → ω K±) = (9.2-2.3+2.6±1.0)×10-6 and B(B± → ωπ±) = (4.2-1.8+2.0±0.5)×10-6. We also measure the partial rate asymmetry of B± → ω K± decays and obtain Acp = -0.21±0.28±0.03. The results are based on a data sample of 29.4fb-1 collected on the υ(4S) resonance by the Belle detector at the KEKB e+e- collider.