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arXiv 1802.05243hep-lathep-ph
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$N_f=3$ QCD中夸克质量的非微扰重整化和运转

Non-perturbative quark mass renormalisation and running in $N_f=3$ QCD

Isabel Campos, Patrick Fritzsch, Carlos Pena, David Preti, Alberto Ramos, Anastassios Vladikas

摘要:

本文从第一性原理出发,确定了Nf=3 QCD中介于电弱标度和强子标度之间的夸克质量反常维数。这允许一个完全的非微扰连接的微扰和非微扰制度的标准模型在强子部门。采用无质量O(a)改进的Wilson夸克和有限尺寸标度技术,计算得到了很高的精度.我们还提供了在重整化轻夸克质量所需的匹配因子从晶格计算O(a)-改进的威尔逊费米子和树级Symanzik改进的规范作用。因此,在确定SM中的轻夸克质量时,由于重整化和运行而产生的总不确定度降低到约1%。

英文摘要:

We determine from first principles the quark mass anomalous dimension in Nf=3 QCD between the electroweak and hadronic scales. This allows for a fully non-perturbative connection of the perturbative and non-perturbative regimes of the Standard Model in the hadronic sector. The computation is carried out to high accuracy, employing massless O(a)-improved Wilson quarks and finite-size scaling techniques. We also provide the matching factors required in the renormalisation of light quark masses from lattice computations with O(a)-improved Wilson fermions and a tree-level Symanzik improved gauge action. The total uncertainty due to renormalisation and running in the determination of light quark masses in the SM is thus reduced to about 1%.

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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