2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/138955Masses of the lowest multiplets of c,b-mesons in S- and P-wave states with quantum numbers JPC: 0-+, 1--, 0++, 1+-, 1++, 2++ are obtained with the help of dispersion N/D method of heavy quark effective theory. The results are in a good agreement with experimental data. Radiative decay widths for some states mentioned above were calculated.21 pagesHigh Energy Physics - Phenomenologytext