A Coulomb plus logarithmic potential treated with first-order perturbation theory produces mass spectra for bottomonium and charmonium that match experiment to 0.24% and 1.65% average deviation after fitting parameters to PDG data.
Spectroscopy and Regge trajectories of heavy quarkonia and Bc mesons,
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Approximate mass spectra of the heavy mesons under a Coulomb plus logarithmic spin-dependent potential function
A Coulomb plus logarithmic potential treated with first-order perturbation theory produces mass spectra for bottomonium and charmonium that match experiment to 0.24% and 1.65% average deviation after fitting parameters to PDG data.