Dynamical quark effects on light quark masses

被引：60

作者：

Khan, AA ^{[1
]}

Aoki, S

Boyd, G

Burkhalter, R

Ejiri, S

Fukugita, M

Hashimoto, S

Ishizuka, N

Iwasaki, Y

Kanaya, K

Kaneko, T

Kuramashi, Y

Manke, T

Nagai, K

Okawa, M

Shanahan, HP

Ukawa, A

Yoshié, T

机构：

[1] Univ Tsukuba, Ctr Computat Phys, Tsukuba, Ibaraki 3058577, Japan

[2] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058571, Japan

[3] Univ Tokyo, Inst Cosm Ray Res, Tanashi, Tokyo 1888502, Japan

[4] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 22期

关键词：

D O I：

10.1103/PhysRevLett.85.4674

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Light quark masses are calculated in lattice QCD with two degenerate flavors of dynamical quarks. The calculations are made with improved actions with lattice spacing a = 0.22-0.11 fm. In the continuum limit we find m(ud)((M) over barS) (2 GeV) =3.44(-0.22)(+0.14)MEV using the pi and rho meson masses as physical input, uum limit we find m,d and m(s) ((M) over barS)(2 GeV) = 88(-6)(+4) MeV or 90(-11)(+5) MeV with the K or phi meson mass as additional input. The quoted errors represent statistical and systematic combined, the latter including those from continuum and chiral extrapolations, and from renormalization factors. Compared to quenched results, two flavors of dynamical quarks reduce quark masses by about 25%.

引用

页码：4674 / 4677

页数：4

共 26 条

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