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 2003/12
形態種別 学術雑誌
査読 査読あり
標題 Observation of a Narrow Charmoniumlike State in Exclusive B± → K±π+π-J/ψ Decays
執筆形態 共著
掲載誌名 Phys. Rev. Lett. 91, 262001 (2003) (6 pages)
著者・共著者 S.-K. Choi, S. L. Olsen, S. Okuno et al. [The Belle Collaboration]
概要 We report the observation of a narrow charmoniumlike state produced in the exclusive decay process B± → K±π+π-J/ψ. This state, which decays into π+π-J/ψ, has a mass of 3872.0±0.6(stat)±0.5(syst) MeV, a value that is very near the MD0 + MD*0 mass threshold. The results are based on an analysis of 152M B-{B} events collected at the υ(4S) resonance in the Belle detector at the KEKB collider. The signal has a statistical significance that is in excess of 10σ.
,BELLE-69.