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arXiv 1606.02244hep-phhep-th
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双圈全正Yang-Mills振幅的局部被积函数

Local integrands for two-loop all-plus Yang-Mills amplitudes

Simon Badger, Gustav Mogull, Tiziano Peraro

摘要:

我们表示的平面五和六胶子双圈杨米尔斯振幅与所有的正螺旋在紧凑的解析形式使用D维局部被积是免费的虚假奇点。被积函数是固定的壳树振幅在六个维度使用D维广义酉削减。所得到的表达式示出有明显的红外行为在被积函数的水平。我们还发现简单的陈述的合理的条款后,在4- 200维集成。

英文摘要:

We express the planar five- and six-gluon two-loop Yang-Mills amplitudes with all positive helicities in compact analytic form using D-dimensional local integrands that are free of spurious singularities. The integrand is fixed from on-shell tree amplitudes in six dimensions using D-dimensional generalised unitarity cuts. The resulting expressions are shown to have manifest infrared behaviour at the integrand level. We also find simple representations of the rational terms obtained after integration in 4-2epsilon dimensions.

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