Charmed, beauty hadrons revisited

Applying two different versions of QCD sum-rules, we reanalyze rigourously the rich spectroscopy of mesons and baryons built from charm and beauty quarks. An improved determination of the masses and the leptonic decay constants of $Bc(bc̄),$ $Bc*(bc̄),$ and $Λ(bcu)$ is presented. Our optimal results, constrained by stability criteria, are consistent in both versions and support the general pattern common to potential models predictions.