The light quark masses from lattice gauge theory

被引：42
|
作者：
Gough, BJ
Hockney, GM
ElKhadra, AX
Kronfeld, AS
Mackenzie, PB
Mertens, BP
Onogi, T
Simone, JN
机构：
[1] FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA
[2] UNIV ILLINOIS, DEPT PHYS, URBANA, IL 61801 USA
[3] UNIV CHICAGO, DEPT PHYS, CHICAGO, IL 60637 USA
[4] HIROSHIMA UNIV, DEPT PHYS, HIGASHIHIROSHIMA 739, JAPAN
来源：
PHYSICAL REVIEW LETTERS | 1997年 / 79卷 / 09期
关键词：
D O I：
10.1103/PhysRevLett.79.1622
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the masses of the light quarks with lattice QCD. Most of the dependence on the lattice spacing a, observed previously with Wilson fermions, is removed by an O(a) corrected action. In the quenched approximation, we obtain a strange quark <(MS)over bar> mass (m) over bar(s)(2 GeV) = 95(16) MeV, and an average of the up and down quark masses (m) over bar(l)(2 GeV) = 3.6(6) MeV. Correcting for quenching, the masses likely are 20% to 40% smaller: 54 < (m) over bar(s)(2 GeV) < 92 MeV and 2.1 < (m) over bar(l)(2 GeV) < 3.5 MeV. We argue that most lattice determinations are consistent with these low values, which are outside the range conventionally given.
引用
收藏
页码：1622 / 1625
页数：4
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