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arXiv 1906.09017hep-th
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四维Ambitwistor弦的全阶软定理

Soft Theorems to All Orders from Four-Dimensional Ambitwistor Strings

QiouShi Li

摘要:

本文研究了四维ambitwistor弦形式中的Yang-Mills和引力振幅在软极限下的行为,并导出了任意阶的软极限定理。为此,我们应用了一些数学。组合学方法用于扩展$δ$函数,图论知识用于扩展简化行列式。在此基础上,我们推广了关于软参数$ε$的Yang-Mills公式和重力振幅公式,得到了任意阶的软定理.

英文摘要:

We study the behaviour of Yang-Mills and gravity amplitudes under the soft limit in the four-dimensional ambitwistor string formalism and derive their soft theorems to arbitrary order. For this purpose, we apply some mathematics. Methods of combinatorics are used for the expansion of $δ$ functions, and knowledge of graph theory is used for the expansion of reduced determinants. Based on these preliminaries, we expand the formulas of Yang-Mills and gravity amplitudes about the soft parameter $ε$, and obtain soft theorems to arbitrary order.

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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