O(α_sv~2) correction to J/ψ plus η_c production in e~+e~- annihilation at √s=10.6 GeV |
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引用本文: | 李习怀,王建雄.O(α_sv~2) correction to J/ψ plus η_c production in e~+e~- annihilation at √s=10.6 GeV[J].中国物理 C,2014,38(4):11-17. |
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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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摘 要: | Based on the nonrelativistic QCD factorization approach, O(αsv2) corrections to J/ψ plus ηc production in m e+e- annihilation at √s=10.6 ≥v 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: | NRQCD O(v2) corrections O(αs) corrections O(αsv2) corrections |
收稿时间: | 2013-4-15 |
修稿时间: | 2013-11-12 |
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