Scaling and Further Tests of Heavy Meson Decay Constant Determinations from NRQCD

Preprint
Publisher Website
Google Scholar
  • 12 July 2000
Abstract
We present results for the B_s meson decay constant f_{B_s} from simulations at three lattice spacings in the range a^{-1}=1.1GeV to 2.6GeV using NRQCD heavy quarks and clover light quarks in the quenched approximation. We study scaling of this quantity and check consistency between mesons decaying from rest and from a state with nonzero spatial momentum. Cancellation of power law contributions that arise in the NRQCD formulation of heavy-light currents is discussed. On the coarsest lattice the D_s meson decay constant f_{D_s} is calculated. Our best values for the decay constants are given by f_{B_s} = 187(3)(4)(12)(2)(8)(6)MeV and f_{D_s} = 223(6)(29)(38)(23)(9)(+3/-1)MeV.

This publication has 0 references indexed in Scilit: