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arXiv 1401.4801hep-phhep-lat
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对轻四夸克流关联函数的微扰$O(α_s)$修正

Perturbative $O(α_s)$ corrections to the correlation functions of light tetraquark currents

S. Groote, J. G. Körner, D. Niinepuu

摘要:

本文计算了轻四夸克流谱函数的算子乘积展开中微扰项的次至首阶QCD修正。通过使用位形空间方法,我们将动量空间四回路计算保持在可管理的水平。我们发现,下一个领导阶修正的微扰项是大的,可以达到$O(100\%)$。相应的Borel和规则的修正,但是,是小的,因为非微扰凝聚的贡献占主导地位的Borel和规则。

英文摘要:

We calculate the next-to-leading order QCD corrections to the perturbative term in the operator product expansion of the spectral functions of light tetraquark currents. By using also configuration space methods we keep the momentum space four-loop calculation to a manageable level. We find that the next-to-leading order corrections to the perturbative term are large and can amount to $O(100\%)$. The corrections to the corresponding Borel sum rules, however, are small since the nonperturbative condensate contributions dominate the Borel sum rules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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