Phenomenological estimate of the binding energy of heavy dimesons

A phenomenological estimate is derived such that the binding energies of di mesons are expressed as combinations of masses of different mesons and bary ons. The estimate is almost model-independent, the only major assumptions b eing that the wave functions of the two light quarks in Lambda (c), Lambda (b) and in the (c) over bar(c) over bar qq and (b) over bar(b) over bar qq dimesons are very similar, and that for heavy quarks the QQ interaction is half as strong as the Q (Q) over bar interaction. We get (b) over bar(b) ov er bar qq (I = 0, J = 1) bound by about 100 MeV and (c) over bar(c) over ba r qq unbound.