O(αsV2) correction to J/ψ plus ηc production in e+e-annihilation at √s=10.6 GeV |
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作者姓名: | 李习怀 王建雄 |
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作者单位: | [1]Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China [2]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China |
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基金项目: | Supported by National Natural Science Foundation of China (10979056,10935012) |
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摘 要: | Based on the nonrelativistic QCD factorization approach, O(αsv2) corrections to J/ψ plus ηc production in e+e- annihilation at √s= 10.6 GeV are calculated in this work. The numerical results show that the correction at αsv2 order is only about a few percent of the total theoretical result. This indicates that the perturbative expansions become convergent and that a higher order correction will be smaller. The uncertainties from the long-distance matrix elements, renormalization scale and the measurement in the experiment are also discussed. Our result is in agreement with the previous result by Jia.
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关 键 词: | 校正 制作 非相对论量子色动力学 计算结果 微扰展开 矩阵元素 不确定性 因子化 |
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