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arXiv 1004.2855hep-th
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振幅/威尔逊圈对偶的一个惊奇

A Surprise in the Amplitude/Wilson Loop Duality

Andreas Brandhuber, Paul Heslop, Panagiotis Katsaroumpas, Dung Nguyen, Bill Spence, Marcus Spradlin, Gabriele Travaglini

摘要:

MHV散射振幅的一个显著特征是它们与类光多边形威尔逊圈的近似相等,这一性质在微扰理论中和非微扰理论中都成立。这种对偶性通常用纯四维量来表示,这些量是分别从振幅和威尔逊圈中减去IR和UV发散而得到的。在本文中,我们证明,通过显式计算,完全出乎意料的事实,即等式继续保持在两个循环通过阶数的维正则化的四粒子振幅和(奇偶偶的一部分)五粒子振幅。

英文摘要:

One of the many remarkable features of MHV scattering amplitudes is their conjectured equality to lightlike polygon Wilson loops, which apparently holds at all orders in perturbation theory as well as non-perturbatively. This duality is usually expressed in terms of purely four-dimensional quantities obtained by appropriate subtraction of the IR and UV divergences from amplitudes and Wilson loops respectively. In this paper we demonstrate, by explicit calculation, the completely unanticipated fact that the equality continues to hold at two loops through order epsilon in dimensional regularization for both the four-particle amplitude and the (parity-even part of the) five-particle amplitude.

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