New Investigations on Meson Spectra Based on the Relativistic Equation for qq Bound States

By considering the retardation effect of gluon propagation and a general Lorents structure of the confinement, a retarded and off-shell one-gluon exchange potential and a harmonic oscillator-dominant confining potential with a certain relativistic corrections are derived based on the relativistic Pauli-Schr6dinger equation for quark-an tiquark bound states. Use of these potentiale to caJculate meson spectra leads to the results which are in good agreement with the experimental data.