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arXiv 2108.04861hep-ph
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极质量重整化子及其分支

Pole mass renormalon and its ramifications

Martin Beneke

摘要:

本文综述了重夸克的极质量与$\overline{\rm MS}$质量之间关系的主要红外重整化子发散的结构,以及对顶夸克、底夸克和粲夸克的应用。极夸克质量的定义在精确计算中必须放弃,这是快速发散级数的一个众所周知的结果。讨论了几种主要的适用于近壳层重夸克过程的无重整化子短程质量定义及其物理动机。

英文摘要:

I review the structure of the leading infrared renormalon divergence of the relation between the pole mass and the $\overline{\rm MS}$ mass of a heavy quark, with applications to the top, bottom and charm quark. That the pole quark mass definition must be abandoned in precision computations is a well-known consequence of the rapidly diverging series. The definitions and physics motivations of several leading renormalon-free, short-distance mass definitions suitable for processes involving nearly on-shell heavy quarks are discussed.

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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