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arXiv 1312.7628hep-lat
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2+1味畴壁费米子位形上重叠夸克双线性的非微扰重整化

Non-perturbative renormalization of overlap quark bilinears on 2+1-flavor domain wall fermion configurations

Zhaofeng Liu, Ying Chen, Shao-Jing Dong, Michael Glatzmaier, Ming Gong, Anyi Li, Keh-Fei Liu, Yi-Bo Yang, Jian-Bo Zhang

摘要:

给出了2+1味畴壁费米子组态上重叠夸克双线性算符的重整化常数。这种设置被chiQCD合作组用于计算物理量,如核子的奇异性和奇异夸克质量。利用沃德恒等式计算了轴向矢量流的标度无关重整化常数。在RI-RNN格式下计算了标量流、赝标量流和矢量流的重整化常数。最后给出了MS-bar格式的计算结果。同时计算了RI-RNN方案中夸克质量的阶跃标度函数。该分析总共使用了三个海夸克的六个不同的系综,每个系综位于两个晶格上,大小分别为24^3x64和32^3x64,间距分别为a=(1.73 GeV)^{-1}和(2.28 GeV)^{-1}。

英文摘要:

We present renormalization constants of overlap quark bilinear operators on 2+1-flavor domain wall fermion configurations. This setup is being used by the chiQCD collaboration in calculations of physical quantities such as strangeness in the nucleon and the strange and charm quark masses. The scale independent renormalization constant for the axial vector current is computed using the Ward Identity. The renormalization constants for scalar, pseudoscalar and vector current are calculated in the RI-MOM scheme. Results in the MS-bar scheme are also given. The step scaling function of quark masses in the RI-MOM scheme is computed as well. The analysis uses, in total, six different ensembles of three sea quarks each on two lattices with sizes 24^3x64 and 32^3x64 at spacings a=(1.73 GeV)^{-1} and (2.28 GeV)^{-1}, respectively.

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