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arXiv 0901.2190hep-ph
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大距离强耦合常数,

The strong coupling constant at large distances

A. Deur

摘要:

本文讨论了有效强耦合常数。与pQCD的alpha_s相反,它们在低Q^2域表现良好。我们提出了一个有效的强耦合常数提取杰斐逊实验室极化数据在中间和低Q ^2。我们还展示了这些数据,连同自旋和规则,使我们能够获得有效的耦合常数在整个Q^2范围。然后,我们讨论了实验提取的耦合常数和理论计算在低Q^2之间的关系。我们的结论的重要性,这样的研究应用的AdS/CFT对应QCD。

英文摘要:

In this paper we discuss effective strong coupling constants. Those are well behaved in the low-Q^2 domain, contrarily to alpha_s from pQCD. We present an extraction of an effective strong coupling constant from Jefferson Lab polarized data at intermediate and low Q^2. We also show how these data, together with spin sum rules, allow us to obtain the effective coupling constant over the entire Q^2 range. We then discuss the relation between the experimentally extracted coupling constant and theoretical calculations at low Q^2. We conclude on the importance of such study for the application of the AdS/CFT correspondence to QCD.

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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