Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-06-07
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages, 3 figures. Extended analysis on the channels considered, rho' and contact contributions compared, figures 3 and 4 com
Scientific paper
We determine the value of the \omega-\rho-\pi mesons coupling (g_{\omega\rho\pi} ), in the context of the vector meson dominance model, from radiative decays, the \omega \rightarrow 3\pi decay width and the e^+e^- \rightarrow 3\pi cross section. For the last two observables we consider the effect of either a heavier resonance (rho'(1450)) or a contact term . A weighted average of the results from the set of observables yields g_{\omega\rho\pi} =13.9 \pm 0.1$ GeV^{-1} in absence of those contributions, and g_{\omega\rho\pi} =11.9 \pm 0.2 GeV^{-1} or g_{\omega\rho\pi} =11.4 \pm 0.1 GeV^{-1} when including the rho' or contact term respectively. Improved measurements of these observables and the rho'(1450) meson parameters are needed to give a definite answer on the pertinence of the inclusion of this last one in the considered processes.
Gudino Garcia D.
Sanchez Genaro Toledo
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