arXiv:hep-lat/9411080·v1·High Energy Physics — Lattice

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🇺🇸

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Abstract

Preliminary results from the MILC collaboration for $f_{B}$ , $f_{B_{s}}$ , $f_{D}$ , $f_{D_{s}}$ 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.