A QCD relation between electromagnetic mass differences of charmed mesons and strange baryons

Relations between hadron mass splittings are obtained from the assumption that the ratio of the electromagnetic and strong contributions to hardon spin splittings depends only upon the ratio of the electromagnetic to the strong couplings of the quark-quark or quark-antiquark pairs involved. This ratio is the same in charmed mesons and strange baryons when the values of color and electric charges of the standard colored quark model are used. Predictions for D¹⁺?D¹⁰ and ∑^1?-∑¹⁺ mass splittings obtained are in good agreement with present experimental data and can be tested much better when better data on D and D¹ masses become available.