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arXiv 1910.04772hep-thhep-ph
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从六维幺正性和旋量螺旋度研究Yang-Mills的完全形状因子

Complete Form Factors in Yang-Mills from Unitarity and Spinor Helicity in Six Dimensions

Manuel Accettulli Huber, Andreas Brandhuber, Stefano De Angelis, Gabriele Travaglini

摘要:

我们提出了一个系统的程序来计算完整的,分析形状因子规范不变的运营商在循环水平纯杨米尔斯。我们考虑应用程序的运营商的形式$\mathrm{Tr}\, F^n$其中$F$是胶子场强度。我们的方法是基于扩展到形状因子的三维重建技术,结合六维旋螺旋形式主义和广义酉性。对于形状因子,这种技术需要引入额外的标量算子,为此我们提供了一个系统的处方。我们还讨论了一个推广的维度重建到任何数量的循环,无论是振幅和形状因子。给出了$n>2$与$\mathrm{Tr}\, F^n$的单圈最小和非最小形状因子的几个新结果.最后,我们描述了\texttt{Mathematica}包\texttt{SpinorHelicity6D},这是专门为处理六维量写在旋螺旋形式主义。

英文摘要:

We present a systematic procedure to compute complete, analytic form factors of gauge-invariant operators at loop level in pure Yang-Mills. We consider applications to operators of the form $\mathrm{Tr}\, F^n$ where $F$ is the gluon field strength. Our approach is based on an extension to form factors of the dimensional reconstruction technique, in conjunction with the six-dimensional spinor-helicity formalism and generalised unitarity. For form factors this technique requires the introduction of additional scalar operators, for which we provide a systematic prescription. We also discuss a generalisation of dimensional reconstruction to any number of loops, both for amplitudes and form factors. Several novel results for one-loop minimal and non-minimal form factors of $\mathrm{Tr}\, F^n$ with $n>2$ are presented. Finally, we describe the \texttt{Mathematica} package \texttt{SpinorHelicity6D}, which is tailored to handle six-dimensional quantities written in the spinor-helicity formalism.

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