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arXiv 2201.12998hep-thhep-ph
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单圈费曼积分的字母表

Alphabet of one-loop Feynman integrals

Jiaqi Chen, Chichuan Ma, Li Lin Yang

摘要:

本文给出了单圈费曼积分字母表的一般结构。字母表中的字母是使用带有切割的Baikov表示来计算的。我们认为收敛和发散切割积分,并观察到,在发散的情况下,可以很容易地从收敛的情况下,通过施加一定的限制,得到的字母。这些字母是根据各种革兰氏行列式写成的简单表达式。字母表的知识使我们能够容易地构造$ d\log $形式的正则微分方程,并有助于引导解的符号。

英文摘要:

In this paper, we present the universal structure of the alphabet of one-loop Feynman integrals. The letters in the alphabet are calculated using the Baikov representation with cuts. We consider both convergent and divergent cut integrals and observe that letters in the divergent cases can be easily obtained from convergent cases by applying certain limits. The letters are written as simple expressions in terms of various Gram determinants. The knowledge of the alphabet enables us to easily construct the canonical differential equations of the $ d\log $ form and aids in bootstrapping the symbols of the solutions.

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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