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arXiv · hep-lat/0309088

Pion and kaon physics with improved staggered quarks

MILC Collaboration·C. Aubin·C. Bernard·C. DeTar·Steven Gottlieb·E. B. Gregory·Urs M. Heller·J. E. Hetrick·J. Osborn·R. Sugar·D. Toussaint
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Abstract

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 $f_π$ 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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MILC Collaboration, C. Aubin, C. Bernard, C. DeTar, Steven Gottlieb, E. B. Gregory, Urs M. Heller, J. E. Hetrick, J. Osborn, R. Sugar, D. Toussaint. 2003-09-15. Pion and kaon physics with improved staggered quarks. https://doi.org/10.1016/s0920-5632(03)02538-6

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