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 2002/07
形態種別 学術雑誌
標題 Measurement of χc2 Production in Two-Photon Collisions
執筆形態 共著
掲載誌名 Phys.Lett. B540 (2002)
巻・号・頁 33-42頁
概要 K. Abe, S. Okuno, et al. [Belle Collaboration]
, The production of the χc2 charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e+e- collider. A clear signal for χc2 → γ J/ψ, J/ψ → L+L- is observed in a 32.6fb-1 data sample accumulated at center-of-mass energies near 10.6GeV, and the product of its two-photon decay width and branching fraction is determined to be γγγc2)B(χc2 → γ J/ψ) B(J/ψ → L+L-)=13.5±1.3~(stat.)±1.1~(syst.)~eV.