B meson decay constant with the Wilson and Clover heavy quark actions

Abstract We present results of our quenched study of the B meson decay constant obtained with a parallel set of simulations with the Wilson and Clover actions at β=5.9, 6.1 and 6.3. Systematic errors associated with the large b -quark mass are analyzed within the Fermilab non-relativistic formalism. As our best estimate in the continum limit we obtain f B =163±16 MeV and f B s =175±18 MeV with the Clover action.