arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1705.04783hep-th
收藏

利用CHY构造中的交比恒等式推导高阶极点的Feynman规则

Derivation of Feynman Rules for Higher Order Poles Using Cross-ratio Identities in CHY Construction

Kang Zhou, Junjie Rao, Bo Feng

摘要:

为了将积分规则推广到含有高阶极点的一般CHY被积函数,本文提出了两个方向的算法。一种是猜想新的规则,另一种是使用交比恒等式。本文用交比恒等式方法重新推导了几种特殊情况下的高阶极点约束积分规则:单双极点、单三极点和双双极点。对于前两种情况,讨论了本文公式与以前所给出的公式的等价性。

英文摘要:

In order to generalize the integration rules to general CHY integrands which include higher order poles, algorithms are proposed in two directions. One is to conjecture new rules, and the other is to use the cross-ratio identity method. In this paper,we use the cross-ratio identity approach to re-derive the conjectured integration rules involving higher order poles for several special cases: the single double pole, single triple pole and duplex-double pole. The equivalence between the present formulas and the previously conjectured ones is discussed for the first two situations.

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。

↑