Semirelativistic potential model for heavy quarkonia

Abstract

The cc¯, bb¯, and t t¯ spectra are investigated with the use of a semirelativistic potential model described in an earlier paper. Results for the energy levels, leptonic widths, and E1 transition widths are compared with the experimental data for cc¯ and bb¯ and predicted for t t¯. We also find that the quark-antiquark interaction can best be described by a quasistatic rather than a momentum-dependent potential, and propose a theoretical justification for this surprising conclusion.