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Дата последнего поиска статьи во внешних источниках: 22 февраля 2016 г.
Аннотация:We discuss the strong couplings gPPV and gVVP for vector (V) and pseudoscalar (P) mesons, at least one of which is a charmonium state J/y or hc. The strong couplings are obtained as residues at the poles of suitable form factors, calculated in a broad range of momentum transfers using a dispersion formulation of the relativistic constituent quark model. The form factors obtained in this approach satisfy all constraints known for these quantities in the heavy-quark limit. Our results suggest sizably higher values for the strong meson couplings than those reported in the literature from QCD sum rules.