2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/127614Masses of pseudoscalar and vector mesons, which are ground states of light or/and heavy quarks and antiquarks, have been calculated in the framework of an extended model of quasi-independent quarks with absolute uncertainties about 30 MeV. It is shown that the assumption on equidistant discrete levels for a mean field energy does not contradict to existing data and permits to reduce a number of model parameters. It is obtained, that a difference between neighbouring mean field energy levels is flavour independent. Values of spin-spin interaction between quarks and antiquarks with different flavours in pseudoscalar and vector mesons are presented.6 pagesHigh Energy Physics - Phenomenologytext