Meson Decay Constant Predictions of the Valence Approximation to Lattice QCD
F. Butler, H. Chen, J. Sexton, A. Vaccarino, D. Weingarten
Abstract
We evaluate fπ/ mρ, fK/ mρ, 1/fρ, and mϕ/(fϕ mρ), extrapolated to physical quark mass, zero lattice spacing and infinite volume, for lattice QCD with Wilson quarks in the valence (quenched) approximation. The predicted mϕ/(fϕ mρ) differs from experiment by less than its statistical uncertainty of approximately 15\%. The other three constants are 10\% to 20\% below experiment, equivalent to between one and two times the corresponding statistical uncertainties.
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