Update on pi and K Physics
MILC Collaboration, C. Bernard, C. DeTar, Steven Gottlieb, U. M. Heller, J. E. Hetrick, L. Levkova, F. Maresca, J. Osborn, D. Renner, R. Sugar, D. Toussaint
Abstract
We present an update of the MILC studies of the physics of light pseudoscalars using improved staggered fermions. New runs at lighter quark mass, as well as increased statistics for older sets, are enabling us to improve the results for decay constants in full QCD. In addition, we have analyzed quenched runs at two different lattice spacings. This makes possible a test of the applicability of staggered chiral perturbation theory in a different context.
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