Improved bilinears in lattice QCD with nondegenerate quarks

被引:66
作者
Bhattacharya, T
Gupta, R
Lee, W
Sharpe, SR
Wu, JMS
机构
[1] TRIUMF, Vancouver, BC V6T 2A3, Canada
[2] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[3] Seoul Natl Univ, Sch Phys, Seoul 151747, South Korea
[4] Univ Washington, Dept Phys, Seattle, WA 98195 USA
来源
PHYSICAL REVIEW D | 2006年 / 73卷 / 03期
关键词
D O I
10.1103/PhysRevD.73.034504
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We describe the extension of the improvement program for bilinear operators composed of Wilson fermions to nondegenerate dynamical quarks. We consider two, three and four flavors, and both flavor nonsinglet and singlet operators. We find that there are many more improvement coefficients than with degenerate quarks, but that, for three or four flavors, nearly all can be determined by enforcing vector and axial Ward identities. The situation is worse for two flavors, where many more coefficients remain undetermined.
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页数:23
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