Workshop on the Physics of Excited Nucleon – NSTAR2009, Beijing, April 19 – 22, 2009

Invited plenary talk

Invited parallel talk

Oral contribution

Authors: F. Huang, A. Sibirtsev, S. Krewald, C. Hanhart, J. Haidenbauer, and U.-G. Meissner

Title: Forward pion-nucleon charge exchange reaction and Regge constraints

Keywords: pion-nucleon interaction, Regge model

Abstract:
We analyze the forward pion-nucleon charge exchange reaction data in a Regge model and compare the resulting amplitudes with those from the Karlsruhe-Helsinki and George-Washington-University partial-wave analyses. We explore possible high-energy constraints for theoretical baryon resonance analyses in the energy region above GeV. Our results show that for the pion-nucleon charge exchange reaction, the appropriate energy region for matching meson-nucleon dynamics to diffractive scattering should be around 3 GeV for the helicity flip amplitude.