具有非例外动量的夸克质量重整化
Quark mass renormalization with non-exceptional momenta
摘要:
在传统的RI/TRI方案中,夸克双线性顶点函数的重整化条件使用了特殊的动量组态。由于晶格截止的实际值,这些顶点函数被不需要的低能物理(π极、零模等)污染,这是系统误差的大来源。这些影响可以通过使用非异常动量来减少。本文基于最近提出的RI/S方案,采用2+1味畴壁费米子,讨论了非例外动量夸克质量重整化。
英文摘要:
Renormalization conditions imposed on quark bilinear vertex functions in the conventional RI/MOM scheme use exceptional momentum configurations. With practical values for the lattice cutoff, these vertex functions are contaminated with unwanted low energy physics (pion pole, zero modes, etc), which is a large source of systematic error. These effects can be reduced by using non-exceptional momenta. We discuss the quark mass renormalization with non-exceptional momenta using 2+1 flavor domain wall fermions based on a recently proposed RI/SMOM scheme.
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