Perturbative renormalization factors of quark bilinear operators for domain-wall QCD
Perturbative renormalization factors of quark bilinear operators for domain-wall QCD
复制标题
畴壁QCD夸克双线性算子的微扰重正化因子
DOI：
10.1103/physrevd.59.094505
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发表时间：
1998
影响因子：
5
通讯作者：
Y. Taniguchi
中科院分区：
文献类型：
--
作者：
S. Aoki;T. Izubuchi;Y. Kuramashi;Y. Taniguchi
计算了畴壁QCD中由物理夸克场构成的双线性算符的单圈重整化因子。我们发现，除了理论中夸克场和零模之间的重叠因子外，这种重整化因子的有限部分在1圈处具有合理的值。我们指出，1-loop估计的整体重整化因子变得不可靠的耦合，目前进行数值模拟，由于存在这种重叠因子。我们表明，这个问题消失，如果平均场改进的微扰理论重整化因子。
We calculate one-loop renormalization factors of bilinear operators made of physical quark fields for domain-wall QCD. We find that finite parts of such renormalization factors have reasonable values at 1-loop except an overlap factor between the physical quark field and the zero mode in the theory. We point out that the 1-loop estimate of overall renormalization factors becomes unreliable at the coupling where numerical simulations are currently performed, due to the presence of this overlap factor. We show that this problem disappears if the mean-field improved perturbation theory is employed for renormalization factors.