Determination of quark-antiquark potentials and meson spectra

We determine two different sets of quark-antiquark potential to be used in a Schrödinger or a Salpeter type equation. The central part contains QCD inspired components: the Coulomb-like interaction, the confinement potential and an instanton interaction. It is supplemented with phenomenological terms: hyperfine, symmetric and antisymmetric spin-orbit, and tensor interactions. The constituent quarks are characterized by a mass and a charge density. The parameters are determined by a minimization procedure on representative samples of mesons. The full spectra are calculated and the charge square radii and the form factors for the pion and the kaon are also studied.