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arXiv 1207.3473hep-th
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沃德恒等式蕴含树级和循环级递归关系

Ward Identity Implies Recursion Relation at Tree and Loop Level

Yun Zhang, Gang Chen

摘要:

本文利用沃德恒等式计算了纯Yang-Mills理论中一对外线复化的树壳和单圈壳的振幅。利用费曼规则在树和单圈层次上证明了沃德恒等式,并给出了离壳振幅的递推关系.我们发现沃德恒等式证明中的取消细节简化了我们推导递归关系的过程。然后,我们计算了三点和四点的一个环壳振幅作为我们的方法的例子。

英文摘要:

In this article, we use Ward identity to calculate tree and one loop level off shell amplitudes in pure Yang-Mills theory with a pair of external lines complexified. We explicitly prove Ward identity at tree and one loop level using Feynman rules, and then give recursion relations for the off shell amplitudes. We find that the cancellation details in the proof of Ward identity simplifies our derivation of the recursion relations. Then we calculate three and four point one loop off shell amplitudes as examples of our method.

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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