https://doi.org/10.1140/epja/i2002-10256-8
Perturbative versus nonperturbative effects at medium energies in the 
reaction
1
Institute of Nuclear Physics, PL-31-342, Kraków, Poland
2
University of Rzeszów, PL-35-959, Rzeszów, Poland
3
Institut für Kernphysik, Forschungszentrum Jülich, D-52425, Jülich, Germany
* e-mail: szczurek@alf.ifj.edu.pl
The interplay of pQCD, pion exchange and FSI effects is studied for the reaction in the region of 2 GeV 
GeV. We find strong interference effects between pQCD and soft-pion-exchange amplitudes up to 
GeV. We discuss to which extend the conventional hadronic FSI effects cloud the pQCD effects. We study multipole soft- and hard-scattering effects as well as the coupling between final-state hadronic channels.
© Società Italiana di Fisica and Springer-Verlag, 2003
