Vector meson production and nucleon resonance analysis in a coupled-channel approach for energies m N <(s)<2 GeV. I. Pion-induced results and hadronic parameters

By G. Penner, U. Mosel. 2002

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We present a nucleon resonance analysis by simultaneously considering all pion- and photon-induced experimental data on the final states $\ensuremath{\gamma}N,$ $\ensuremath{\pi}N,$ $2\ensuremath{\pi}N,$ $\ensuremath{\eta}N,$ $K\ensuremath{\Lambda},$ $K\ensuremath{\Sigma},$ and $\ensuremath{\omega}N$ for energies from the nucleon mass up to $\sqrt{s}=2$ GeV. In this analysis we find strong evidence for the resonances ${P}_{31}(1750),$ ${P}_{13}(1900),$ ${P}_{33}(1920),$ and ${D}_{13}(1950).$ The $\ensuremath{\omega}N$ production mechanism is dominated by large ${P}_{11}(1710)$ and ${P}_{13}(1900)$ contributions. In this first part, we present the results of the pion-induced reactions and the extracted resonance and background properties with emphasis on the difference between global and purely hadronic fits.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/899dccdae3a6b37ceb93de184331c85546dcba2b