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arXiv 1608.00883hep-th
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用CHY公式直接计算四维Einstein-Yang-Mills理论中$n$点单迹MHV振幅

Direct Evaluation of $n$-point single-trace MHV amplitudes in 4d Einstein-Yang-Mills theory using the CHY Formalism

Yi-Jian Du, Fei Teng, Yong-Shi Wu

摘要:

在本文中,我们扩展了我们的技术,在以前的论文(杜等,JHEP 05(2016)086)中开发的直接评估任意$n$点树级MHV振幅在4d杨米尔斯和重力理论使用Cachazo-He-Yuan(CHY)形式主义,4d爱因斯坦-杨米尔斯(EYM)理论。EYM理论中的任何单道色序$n$点树级MHV振幅,都是通过直接计算CHY公式得到的,是Parke-Taylor因子和Hodges行列式的一种优美的因式分解形式,比文献中已有的公式简单得多,也更紧凑.我们证明了我们的新表达式是等价于简化的Selivanov-Bern-De Freitas-Wong(SBDW)公式,与一个新的定理的帮助下,SBDW生成函数具有图论的解释。与参考文献(Du等,JHEP 05(2016)086)一起,我们为量子场论中隐藏的简单性提供了强有力的分析证据。

英文摘要:

In this paper we extend our techniques, developed in a previous paper (Du, etc, JHEP 05(2016)086) for direct evaluation of arbitrary $n$-point tree-level MHV amplitudes in 4d Yang-Mills and gravity theory using the Cachazo-He-Yuan (CHY) formalism, to the 4d Einstein-Yang-Mills (EYM) theory. Any single-trace color-ordered $n$-point tree-level MHV amplitude in EYM theory, obtained by a direct evaluation of the CHY formula, is of an elegant factorized form of a Parke-Taylor factor and a Hodges determinant, much simpler and more compact than the existing formulas in the literature. We prove that our new expression is equivalent to the conjectured Selivanov-Bern-De Freitas-Wong (SBDW) formula, with the help of a new theorem showing that the SBDW generating function has a graph theory interpretation. Together with Ref. (Du, etc, JHEP 05(2016)086), we provide strong analytic evidence for hidden simplicity in quantum field theory.

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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