Light-quark masses from unquenched lattice QCD

被引：53

作者：

Ishikawa, T. ^{[1
,2
]}

Aoki, S. ^{[2
,3
]}

Fukugita, M. ^{[4
]}

Hashimoto, S. ^{[5
,6
]}

Ishikawa, K-I. ^{[7
]}

Ishizuka, N. ^{[1
,3
]}

Iwasaki, Y. ^{[3
]}

Kanaya, K. ^{[3
]}

Kaneko, T. ^{[5
,6
]}

Kuramashi, Y. ^{[1
,3
]}

Okawa, M. ^{[7
]}

Taniguchi, Y. ^{[1
,3
]}

Tsutsui, N. ^{[5
]}

Ukawa, A. ^{[1
,3
]}

Yamada, N. ^{[5
,6
]}

Yoshie, T. ^{[1
,3
]}

机构：

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

[2] RIKEN, BNL Res Ctr, Brookhaven Natl Lab, Upton, NY 11973 USA

[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan

[4] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan

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

[6] Grad Univ Adv Studies Sokendai, Sch High Energy Accelerator Sci, Tsukuba, Ibaraki 3050801, Japan

[7] Hiroshima Univ, Dept Phys, Higashihiroshima 7398526, Japan

来源：

PHYSICAL REVIEW D | 2008年 / 78卷 / 01期

关键词：

D O I：

10.1103/PhysRevD.78.011502

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the light meson spectrum and the light quark masses by lattice QCD simulation, treating all light quarks dynamically and employing the Iwasaki gluon action and the nonperturbatively O(a)-improved Wilson quark action. The calculations are made at the squared lattice spacings at an equal distance a(2) similar or equal to 0.005, 0.01, and 0.015 fm(2), and the continuum limit is taken assuming an O(a(2)) discretization error. The light meson spectrum is consistent with experiment. The up, down, and strange quark masses in the (MS) over bar scheme at 2 GeV are (m) over bar = (m(u)+m(d))/2 = 3.55(-0.28)(+0.65) MeV and m(s) = 90.1(-6.1)(+17.2) MeV where the error includes statistical and all systematic errors added in quadrature. These values contain the previous estimates obtained with the dynamical u and d quarks within the error.

引用

页数：5

共 31 条

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