TY - JOUR
T1 - Results for light pseudoscalars from three-flavor simulations
AU - Aubin, C.
AU - Bernard, C.
AU - DeTar, C.
AU - Gottlieb, Steven
AU - Gregory, E. B.
AU - Heller, Urs M.
AU - Hetrick, J. E.
AU - Osborn, J.
AU - Sugar, R. L.
AU - Toussaint, D.
PY - 2005/3
Y1 - 2005/3
N2 - 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 (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: fπ = 129.5 ± 0.9 ± 3.5 MeV, fK = 156.6 ± 1.0 ± 3.6 MeV, and fK/fπ = 1.210 (4) (13). The value for fK/fπ implies Vus = 0.2219 (26). We also obtain mu/md = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, mu/md = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine mu and md in the MS scheme.
AB - 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 (SχPT) forms and extrapolating in quark mass and lattice spacing, we find: fπ = 129.5 ± 0.9 ± 3.5 MeV, fK = 156.6 ± 1.0 ± 3.6 MeV, and fK/fπ = 1.210 (4) (13). The value for fK/fπ implies Vus = 0.2219 (26). We also obtain mu/md = 0.43(0) (1) (8), or, with more input on electromagnetic (EM) effects from the continuum, mu/md = 0.41 (0) (1) (4). Using the one-loop perturbative mass renormalization [1], we determine mu and md in the MS scheme.
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U2 - 10.1016/j.nuclphysbps.2004.11.174
DO - 10.1016/j.nuclphysbps.2004.11.174
M3 - Article
AN - SCOPUS:12844268813
VL - 140
SP - 231
EP - 233
JO - Nuclear and Particle Physics Proceedings
JF - Nuclear and Particle Physics Proceedings
SN - 2405-6014
IS - SPEC. ISS.
ER -