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    高師機構典藏 NKNUIR > 理學院 > 物理學系 > 期刊論文 >  Item 987654321/10707
    Please use this identifier to cite or link to this item: http://ir.nknu.edu.tw/ir/handle/987654321/10707

    題名: Production of Prompt Charmonia in e+ e- Annihilation At S**(1/2) is Approximately 10.6-GeV
    Authors: 郭榮升
    K. Abe;Rurng-Sheng Kuo
    貢獻者: 物理系
    Date: 2002-01-16
    Issue Date: 2010-11-11 09:06:53 (UTC+8)
    Abstract: The production of prompt J/ψ, ψ(2S), χc1, and χc2 is studied using a 32.4fb−1 data sample collected with the Belle detector at Υ(4S) and at 60MeV 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.
    關聯: Phys. Rev. Lett. / Vol. 88, Iss. 5 , 052001
    Appears in Collections:[物理學系] 期刊論文
    [物理系] 郭榮升

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