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arXiv 1502.07773hep-lat
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N_f=3格点量子色动力学轴流的非微扰改进和重整化

Non-perturbative improvement and renormalization of the axial current in N_f=3 lattice QCD

John Bulava, Michele Della Morte, Jochen Heitger, Christian Wittemeier

摘要:

本文报道了在三味O(a)改进的格点量子色动力学中用Wilson夸克和树能级Symanzik改进规范作用量对轴矢流重正化因子Z_A的非微扰计算,并回顾了我们最近对改进系数c_A的测定.我们的规范化和改进条件制定在恒定的物理薛定谔功能设置。归一化条件利用完整的、大质量的轴向沃德恒等式来减少有限夸克质量对Z_A的影响,并利用边界波函数来抑制赝标通道中的激发态贡献。

英文摘要:

We report on a non-perturbative computation of the renormalization factor Z_A of the axial vector current in three-flavour O(a) improved lattice QCD with Wilson quarks and tree-level Symanzik improved gauge action and also recall our recent determination of the improvement coefficient c_A. Our normalization and improvement conditions are formulated at constant physics in a Schrödinger functional setup. The normalization condition exploits the full, massive axial Ward identity to reduce finite quark mass effects in the evaluation of Z_A and correlators with boundary wave functions to suppress excited state contributions in the pseudoscalar channel.

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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