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arXiv 2602.21057hep-thhep-ph
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无质量标量三点幅的自对偶性

Self-duality of massless scalar three-point amplitudes

II. Institut für Theoretische Physik(第二理论物理研究所)

Oliver Schnetz

AI总结:

研究证明,无质量标量三点费曼积分在傅里叶变换下具有自对偶性,推导了图形函数的新恒等式和标量积分的新扭关系。

摘要:

我们证明,非壳层无质量标量三点费曼积分在傅里叶变换下具有自对偶性。这表明,动量空间积分可以表示为相同费曼图的位置空间积分,边权重变换(而非对偶图)若外部顶点相应标记。特别地,任何非壳层无质量标量三点费曼积分均可表示为图形函数。该结果直接来自M.Golz,E.Panzer和作者于2015年的参数表示定理,但仅在2025年X.Jiang研究四维N=4超Yang-Mills理论时才被观察到。我们推广了Jiang的结果,并讨论了自对偶性在图形函数中的后果。特别是,我们推导了图形函数的新恒等式和标量积分(费曼周期)在ϕ^4理论中的新扭关系。

英文摘要:

We prove that off-shell massless scalar three-point Feynman integrals are self-dual under Fourier transformation. This implies that a momentum space integral can be expressed as the position space integral of the same Feynman graph with transformed edge-weights (not the dual graph) if external vertices are labeled accordingly. In particular, any off-shell massless scalar three-point Feynman integral can be expressed as a graphical function. The result follows immediately from a theorem by M. Golz, E. Panzer and the author on parametric representations of position space integrals (2015), but it was only observed by X. Jiang in 2025 in the context of four-dimensional $\mathcal{N}=4$ Super-Yang-Mills theory. We generalize Jiang's result and discuss the consequences of the self-duality in the context of graphical functions. In particular, we derive a new identity for graphical functions and a new twist relation for scalar integrals (Feynman periods) in $ϕ^4$ theory.

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