Pion-nucleon scattering in a meson-exchange model

Details Pion-nucleon scattering in a meson-exchange model Pion-nucleon scattering in a meson-exchange model

2003-07-17

arxiv.org/abs/nucl-th/0307072v1

Phys.Rev. C68 (2003) 045207

Physics

Nuclear Physics

Nuclear Theory

32 pages, 9 figures

Scientific paper

10.1103/PhysRevC.68.045207

The pi-N interaction is studied within a meson-exchange model and in a coupled-channels approach which includes the channels pi-N, eta-N, as well as three effective pi-pi-N channels namely rho-N, pi-Delta, and sigma-N. Starting out from an earlier model of the Julich group systematic improvements in the dynamics and in some technical aspects are introduced. With the new model an excellent quantitative reproduction of the pi-N phase shifts and inelasticity parameters in the energy region up to 1.9 GeV and for total angular momenta J leq 3/2 is achieved. Simultaneously, good agreement with data for the total and differential pi-N -> eta-N transition cross sections is obtained. The connection of the pi_N dynamics in the S_{11} partial wave with the reaction pi-N -> eta-N is discussed.

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