Abstract
We determine the value of the ω − ρ − π mesons coupling (gωρπ), in the context of the vector meson dominance model, from radiative decays, the ω → 3π decay width and the e+e− → 3π cross section. For the last two observables we consider the effect of either a heavier resonance (ρ'(1450)) or a contact term . A weighted average of the results from the set of observables yields gωρπ = 13.9 ± 0.1 GeV−1 in absence of those contributions, and gωρπ = 11.9 ± 0.2 GeV−1 or gωρπ = 11.4 ± 0.1 GeV−1 when including the p' or contact term respectively. Improved measurements of these observables and the p'(1450) meson parameters are needed to give a definite answer on the pertinence of the inclusion of this last one in the considered processes.
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