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A meson-exchange piN model up to energies sqrt(s) < 2.0 GeV

Shin Nan Yang·Guan Yeu Chen·S. S. Kamalov
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Abstract

A meson-exchange piN model, previously constructed using three-dimensional reduction scheme of the Bethe-Salpeter equation for a model Lagrangian involving π, η, N, Δ, rho, and σfields, is extended to energies up to 2 GeV by including the ηN channel and all the four stars πN resonances up to the F-waves. The effects of other 2 pion channels are taken into account phenomenologically. The extended model gives an excellent fit to both piN phase shifts and inelasticity parameters in all channels up to the F-waves. However, a few of the extracted resonance parameters differ considerably from the PDG values.

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Shin Nan Yang, Guan Yeu Chen, S. S. Kamalov. 2006-10-19. A meson-exchange piN model up to energies sqrt(s) < 2.0 GeV. https://doi.org/10.1016/j.nuclphysa.2007.03.151

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