Backward pion-nucleon scattering |
| |
| Authors: | F?Huang A?Sibirtsev J?Haidenbauer S?Krewald U?-G?Mei?ner |
| |
| Institution: | 1.Department of Physics and Astronomy,The University of Georgia,Athens,USA;2.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics,Universit?t Bonn,Bonn,Germany;3.Excited Baryon Analysis Center (EBAC), Thomas Jefferson National Accelerator Facility,Newport News,USA;4.Institut für Kernphysik and Jülich Center for Hadron Physics,Forschungszentrum Jülich,Jülich,Germany;5.Institute for Advanced Simulation,Forschungszentrum Jülich,Jülich,Germany |
| |
| Abstract: | 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 Na\ensuremath N_{\alpha} , Ng\ensuremath N_{\gamma} , Dd\ensuremath \Delta_{\delta} and Db\ensuremath \Delta_{\beta} 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 G39\ensuremath G_{39} -resonance with a mass of 2.83GeV as member of the Db\ensuremath \Delta_{\beta} -trajectory from the corresponding Chew-Frautschi plot. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
