Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks

MILC Collaboration; Bernard, C.; Datta, S.; DeTar, C.; Gottlieb, Steven; Gregory, E. B.; Heller, U. M.; Osborn, J.; Sugar, R. L.; Toussaint, D.

Heavy-light decay constants using clover valence quarks and three flavors of dynamical improved staggered quarks

Authors

Description

Starting in 2001, the MILC Collaboration began a large scale calculation of heavy-light meson decay constants using clover valence quarks on ensembles of three flavor configurations. For the coarse configurations, with a=0.12 fm, eight combinations of dynamical light and strange quarks have been analyzed. For the fine configurations, with a=0.09 fm, three combinations of quark masses are studied. Since we last reported on this calculation, statistics have been increased on the fine ensembles, and, more importantly, a preliminary value for the perturbative renormalization of the axial-vector current has become available. Thus, results for f_B, f_{B_s}, f_D and f_{D_s} can, in principle, be calculated in MeV, in addition to decay-constant ratios that were calculated previously.
Talk presented at Lattice2004(heavy), Fermilab, June 21-26, 2004; 3 pages, 3 color figures