Masses and decay constants of heavy-light flavour mesons in a variational scheme

The hadronic properties of heavy-light flavour mesons, vis a vis B, B-s, D and D-s, are investigated by treating the light flavour relativistically and the heavy flavour non-relativistically with an effective quark-antiquark interaction potential of the form -(alphac)/(r) + Ar-upsilon. The Fermi momentum parameter generally used for experimental analysis, ground state masses, the ratio of the pseudoscalar decay constants and the vector-pseudoscalar mass differences and their ratios are computed for values of the potential index v varying from 0.5 to 2.0. The excellent agreement of the properties calculated here with the experimental values suggest the most suitable potential form to be upsilon = 0.5.