| J/ψ Inclusive Photon Spectrum at BESⅢ |
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| 引用本文： | 边渐鸣,沈肖雁,李卫国.J/ψ Inclusive Photon Spectrum at BESⅢ[J].中国物理快报,2009(4):70-73. |
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| 作者姓名： | 边渐鸣 沈肖雁 李卫国 |
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| 作者单位： | Institute of High Energy Physics, Academy of Sciences, Beijing 100049 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under contracts Nos 10491300, 10625524 and 10821063. |
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| 摘 要： | With a 15M J/ψ inclusive Monte Carlo sample, the absolute branching fraction of J/ψ→γη′ from the J/ψ inclusive photon spectrum is measured to be Br（J/ψ→γη′）= （4.68 ± 0.08± 0.27） × 10-3, which is in good agreement with the input value. The J/ψ→γfJ（2220） is also searched for using the same sample. Under our assumptions, the statistical significanees of J/ψ→γfJ（2220） are larger than 7σ.
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| 关 键 词： | 光子谱 焦耳 包容 蒙特卡洛 光谱测量 样本 福建 |
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