Charmed Mesons and Charmonia: Three-Meson Strong Couplings

摘要

Revisiting the strong couplings of three mesons, each of which involves at least one charm quark, proves clear disaccord between quark-model and QCD sum-rule results. We extract the strong couplings of three mesons among which there is, at least, one of the charmonia η_c and J/ψ from the residues of poles in adequate transition form factors for timelike momentum transfer, which, in turn, are inferred from a relativistic dispersion approach based on a constituent-quark model.