2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/201247We consider radiative and pionic decays of the new D_s-mesons in the framework of a phenomenologically motivated approach. Present data on ratios of the two kinds of decays can be described without explicit using a 4-quark component. Most probably, the isospin violation in decays of different D_s-mesons is not universal, and the binding potential should be different from Coulombic. New precise measurements may provide further clarification for the nature of the D_s excited states.12 pages, LatexHigh Energy Physics - Phenomenologytext