Decay constants of heavy quark mesons in a non-relativistic quark model

Abstract

The weak decay constants of charm, bottom and top quark pseudoscalar mesons are calculated in a non-relativistic QCD potential model. The decay constants are obtained as ƒ D > ƒ B > ƒ T. An opposite result, ƒ D < ƒ B < ƒ T, is obtained by Mathur et al. using the QCD sum rules. A possible cause of this discrepancy and a comparison of our results with other calculations is presented also.