Pion and kaon physics with improved staggered quarks

Details Pion and kaon physics with improved staggered quarks Pion and kaon physics with improved staggered quarks

2003-09-15

arxiv.org/abs/hep-lat/0309088v1

Nucl.Phys.Proc.Suppl.129:227-229,2004

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2003(spectrum); 3 pages, 1 eps figure

Scientific paper

10.1016/S0920-5632(03)02538-6

We compute pseudoscalar meson masses and decay constants using staggered quarks on lattices with three flavors of sea quarks and lattice spacings $\approx 0.12$ fm and $\approx 0.09$ fm. We fit partially quenched results to ``staggered chiral perturbation theory'' formulae, thereby taking into account the effects of taste-symmetry violations. Chiral logarithms are observed. From the fits we calculate $f_\pi$ and $f_K$, extract Gasser-Leutwyler parameters of the chiral Lagrangian, and (modulo rather large perturbative errors) find the light and strange quark masses.

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