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arXiv 1003.1482hep-ph
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规范不变性、因果性和胶子极

Gauge invariance, causality and gluonic poles

I. V. Anikin, O. V. Teryaev

摘要:

本文研究了具有一个横极化强子的Drell-Yan过程的强子张量的电磁规范不变性。胶子场的轮廓规范起着特殊的作用。讨论了twist 3关联器中胶子极点的计算公式与因果性质的关系,并与硬过程的计算公式进行了比较。作为结果,我们得到额外的贡献,天真地没有虚相。Drell-Yan过程的单自旋不对称性增强了两倍。

英文摘要:

We explore the electromagnetic gauge invariance of the hadron tensor of the Drell-Yan process with one transversely polarized hadron. The special role is played by the contour gauge for gluon fields. The prescription for the gluonic pole in the twist 3 correlator is related to causality property and compared with the prescriptions for exclusive hard processes. As a result of we get the extra contributions, which naively do not have an imaginary phase. The single spin asymmetry for the Drell-Yan process is enhanced by the factor of two.

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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