Results for light pseudoscalars from three-flavor simulations

被引：8

作者：

Aubin, C

Bernard, C ^{[1
]}

DeTar, C

Gottlieb, S

Gregory, EB

Heller, UM

Hetrick, JE

Osborn, J

Sugar, RL

Toussaint, D

机构：

[1] Washington Univ, Dept Phys, St Louis, MO 63130 USA

[2] Univ Utah, Dept Phys, Salt Lake City, UT 84112 USA

[3] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[4] Univ Arizona, Dept Phys, Tucson, AZ 85721 USA

[5] Amer Phys Soc, Ridge, NY 11961 USA

[6] Univ Pacific, Dept Phys, Stockton, CA 95211 USA

[7] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

NUCLEAR PHYSICS B-PROCEEDINGS SUPPLEMENTS | 2005年 / 140卷

关键词：

D O I：

10.1016/j.nuclphysbps.2004.11.174

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We compute pseudoscalar meson masses and decay constants in partially quenched QCD with three dynamical flavors of improved staggered quarks. Fitting the lattice data to staggered chiral perturbation theory (SchiPT) forms and extrapolating in quark mass and lattice spacing, we find: f(pi) = 129.5 +/- 0.9 +/- 3.5 MeV, f(K) = 156.6 +/- 1.0 +/- 3.6 MeV, and fK/f(pi) = 1.210(4)(13). The value for fK/f(pi) implies \V-us\ = 0.2219(26). We also obtain m(u)/m(d) = 0.43(0)(1)(8), or, with more input on electromagnetic (EM) effects from the continuum, m(u)/m(d) = 0.41(0)(1)(4). Using the one-loop perturbative mass renormalization [1], we determine m(u) and m(d) in the (MS) over bar scheme.

引用

页码：231 / 233

页数：3

共 12 条

[1] First determination of the strange and light quark masses from full lattice QCD [J].