Computation of the Heavy-Light Decay Constant with NRQCD
arXiv:hep-lat/9312037 · doi:10.1016/0920-5632(94)90412-X
Abstract
Non-relativistic QCD is applied for a lattice computation of the heavy-light meson decay constant in quenched approximation at . Clear signals are obtained for the ground state at large times in the correlators, allowing a reliable extraction of the decay constant. Estimating the current renormalization factor by the tadpole improvement procedure, we find 164(17) MeV for the meson with 2.3 GeV, while an extrapolation to the static limit yields $f_{B}^{\mbox{static}}=$ 247(26) MeV.
3 pages, 4 figures in PostScript format, to appear in the Proceedings of Lattice 93, Dallas, Oct. 1993