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 2001/10
形態種別 学術雑誌
標題 Observation of BJ/ψK1(1270)
執筆形態 共著
掲載誌名 Physical Review Letters:Volume87, 161601 (2001)
概要 K. Abe, S. Okuno, et al. [Belle Collaboration], We report the first observation of the exclusive decay process BJ/ψK1(1270) using a sample of 11.2M B{B} meson pairs collected in the Belle detector at the KEKB asymmetric energy e+e- collider. We measure branching fractions of B[B0J/ψK10(1270)] = (1.30±0.34±0.32) × 10-3 and B[B+J/ψK1+(1270)] = (1.80±0.34±0.39) × 10-3, where the first error is statistical and the second is systematic. These modes constitute approximately 15% of the total number of BJ/ψX decays. No evidence is seen for BJ/ψK1(1400) and we set an upper limit for this branching fraction.