https://doi.org/10.1140/epja/i2010-10930-2
Regular Article - Theoretical Physics
Backward pion-nucleon scattering
1
Department of Physics and Astronomy, The University of Georgia, 30602, Athens, GA, USA
2
Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, D-53115, Bonn, Germany
3
Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility, 23606, Newport News, VA, USA
4
Institut für Kernphysik and Jülich Center for Hadron Physics, Forschungszentrum Jülich, D-52425, Jülich, Germany
5
Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425, Jülich, Germany
* e-mail: j.haidenbauer@fz-juelich.de
Received:
28
October
2009
Revised:
15
January
2010
Accepted:
24
January
2010
Published online:
21
February
2010
A global analysis of the world data on differential cross-sections and polarization asymmetries of backward pion-nucleon scattering for invariant collision energies above 3GeV is performed in a Regge model. Including the 
, 
, 
and 
trajectories, we reproduce both angular distributions and polarization data for small values of the Mandelstam variable u , in contrast to previous analyses. The model amplitude is used to obtain evidence for baryon resonances with mass below 3GeV. Our analysis suggests a 
-resonance with a mass of 2.83GeV as member of the -trajectory from the corresponding Chew-Frautschi plot.
© SIF, Springer-Verlag Berlin Heidelberg, 2010
