Preliminary heavy-light decay constants from the MILC collaboration
C. Bernard, T. Blum, A. De, T. DeGrand, C. DeTar, Steven Gottlieb, U. M. Heller, N. Ishizuka, L. Kärkkäinen, J. Labrenz, A. Soni, R. Sugar, D. Toussaint
Abstract
Preliminary results from the MILC collaboration for fB, fBs, fD, fDs and their ratios are presented. We compute in the quenched approximation at β=6.3, 6.0 and 5.7 with Wilson light quarks and static and Wilson heavy quarks. We attempt to quantify systematic errors due to finite volume, finite lattice spacing, large am, and fitting and extrapolation uncertainties. The hopping parameter approach of Henty and Kenway is used to treat the heavy quarks; the sources are Coulomb gauge gaussians.
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