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arXiv 2201.09740hep-lat
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一个新的局部算子的非微扰重整化格式

A novel nonperturbative renormalization scheme for local operators

Anna Hasenfratz, Christopher J. Monahan, Matthew D. Rizik, Andrea Shindler, Oliver Witzel

摘要:

梯度流指数抑制紫外线场的波动和消除紫外线发散(乘法费米波函数重整化)。它可以用来描述实空间的威尔逊重整化群变换,并确定相应的beta函数。我们提出了一个新的非微扰重整化方案的局部复合费米子算子,使用梯度流,并服从格点量子色动力学计算。我们提出了初步的非微扰结果夸克双线性算子在这个计划中运行,并概述了微扰匹配的MS-酒吧计划的计算。

英文摘要:

The gradient flow exponentially suppresses ultraviolet field fluctuations and removes ultraviolet divergences (up to a multiplicative fermionic wavefunction renormalization). It can be used to describe real-space Wilsonian renormalization group transformations and determine the corresponding beta function. We propose a new nonperturbative renormalization scheme for local composite fermionic operators that uses the gradient flow and is amenable to lattice QCD calculations. We present preliminary nonperturbative results for the running of quark bilinear operators in this scheme and outline the calculation of perturbative matching to the MS-bar scheme.

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