研究者情報 | 神奈川大学

オクノ　ショウジ Okuno Shoji 奥野　祥二所属神奈川大学情報学部システム数理学科職種助教
言語種別	日本語
発行・発表の年月	2002/02
形態種別	学術雑誌
標題	Production of Prompt Charmonia in e⁺e^- Annihilation at §qrt{s} ≈ 10.6 GeV
執筆形態	共著
掲載誌名	Physical Review Letters:Volume88, 052001 (2002)
概要	K. Abe, S. Okuno, et al. [Belle Collaboration] , The production of prompt J/ψ,ψ(2S), χ_c1, and χ_c2 is studied using a 32.4fb^-1 data sample collected with the Belle detector at υ(4S) and at 60 MeV below the resonance. The yield of prompt J/ψ mesons in the υ(4S) sample is compatible with that of continuum production; we set an upper limit B(υ(4S) → J/ψX) ＜ 1.9 × 10^-4 at the 95% confidence level, and find σ(e⁺e^- → J/ψX) = 1.47±0.10±0.13pb. The cross sections for prompt ψ(2S) and direct J/ψ are measured. The J/ψ momentum spectrum, production angle distribution, and polarization are studied.