On the universality of quark-antiquark interactions in the independent quark model

Parameters of the QCD-motivated static potential are evaluated on the basis of 1−− meson mass spectra. Their values are found to be with high precision the same for different quark-antiquark interactions independently on the quark flavours. Using these universal parameters the renormalization group invariant masses of quarks are calculated. It is also shown that the masses of π-meson radial excitations in this model are compatible with experimental data.