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arXiv 2604.19232hep-phhep-th
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量子色动力学中软异常维数的进展

Progress on the soft anomalous dimension in QCD

The University of Edinburgh(爱丁堡大学)

Einan Gardi, Zehao Zhu

AI总结:

本文综述了多腿量子色动力学幅的红外奇异性现状,揭示了软异常维数简洁性的关键原因,并提出了一种基于半无限威尔逊线相关子的轻锥展开策略,用于计算该量,实现了单个重色子与任意数量轻子幅的三阶软异常维数计算。

摘要:

我们回顾了多腿量子色动力学幅的红外奇异性现状,识别了软异常维数显著简洁性的关键原因。然后,我们提出了一种新的策略,利用半无限威尔逊线相关子的轻锥展开,通过区域方法计算该量。最近,这种策略使我们能够确定由单个重色子和任意数量轻子构成的幅的三阶软异常维数。这为计算涉及两个重粒子的三阶软异常维数以及可能更高阶的计算打开了途径。

英文摘要:

We review the state-of-the-art knowledge of IR singularities in multileg QCD amplitudes, identifying the key reasons for the remarkable simplicity of the soft anomalous dimension. We then present a novel strategy to compute this quantity using a lightcone expansion of correlators of semi-infinite Wilson lines by the Method of Regions. Recently, this strategy allowed us to determine the three-loop soft anomalous dimension for amplitudes consisting of a single massive coloured particle with any number of massless ones. It opens the way to computing this quantity for amplitudes involving two heavy particles at three loops and potentially going to higher loop orders.

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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