Summary
Quasi-relativistic variational calculations supplemented by the virial theorem are used to improve the determination of the Lorentz structure of the quark-antiquark potential in quarkonium. No satisfactory solution exists for a purely vectorlike internal 1/r and a purely scalar external r interactions. We present the result of assuming an admixture of scalar, pseudoscalar and vector Lorentz effective potentials. Solutions with and without a pseudoscalar potential are found for charmonium and bottomonium, within a 1 MeV precision. The toponium spectra for mt = 150 GeV top quark are reported.
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Cocho, G., Jáuregui, R., Moreno, M. et al. Lorentz structure of the cornell potential. Nuov Cim A 107, 341–352 (1994). https://doi.org/10.1007/BF02831441
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DOI: https://doi.org/10.1007/BF02831441