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arXiv 1608.08448hep-th
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高维算子振幅的新公式

New Formulas for Amplitudes from Higher-Dimensional Operators

Song He, Yong Zhang

摘要:

本文研究了Cachazo-He-Yuan公式中高维算符的树能级振幅,包括规范理论中的$F^3$算符和引力理论中的$R^3$算符$R^2$.作为Yang-Mills理论中约化Pfwean的推广,我们发现了一个新的规范不变的物体,它通过一个$F^3$的插入导致胶子振幅,并通过Kawai-Lewellen-Tye关系导致引力振幅.当减少到四维给定的螺旋度,新的对象消失的散射方程的任何解决方案,减少Pfiran是非零的。四维空间中这种有趣的行为解释了高斯-邦尼$R^2$项所产生的引力子螺旋度振幅的消失,并为$F^3$和$R^3$振幅分解为自对偶和反自对偶部分提供了散射方程的起源。

英文摘要:

In this paper we study tree-level amplitudes from higher-dimensional operators, including $F^3$ operator of gauge theory, and $R^2$, $R^3$ operators of gravity, in the Cachazo-He-Yuan formulation. As a generalization of the reduced Pfaffian in Yang-Mills theory, we find a new, gauge-invariant object that leads to gluon amplitudes with a single insertion of $F^3$, and gravity amplitudes by Kawai-Lewellen-Tye relations. When reduced to four dimensions for given helicities, the new object vanishes for any solution of scattering equations on which the reduced Pfaffian is non-vanishing. This intriguing behavior in four dimensions explains the vanishing of graviton helicity amplitudes produced by the Gauss-Bonnet $R^2$ term, and provides a scattering-equation origin of the decomposition into self-dual and anti-self-dual parts for $F^3$ and $R^3$ amplitudes.

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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