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Neutral pion photoproduction at high energies |
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| Authors: | A.?Sibirtsev J.?Haidenbauer S.?Krewald U.?-G.?Mei?ner A.?W.?Thomas |
| Affiliation: | 1.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) und Bethe Center for Theoretical Physics,Universit?t Bonn,Bonn,Germany;2.Excited Baryon Analysis Center (EBAC),Thomas Jefferson National Accelerator Facility,Newport News,USA;3.Institut für Kernphysik and Jülich Center for Hadron Physics,Forschungszentrum Jülich,Jülich,Germany;4.Institute of Advanced Simulations,Forschungszentrum Jülich,Jülich,Germany;5.Theory Center,Thomas Jefferson National Accelerator Facility,Newport News,USA;6.College of William and Mary,Williamsburg,Williamsburg,USA |
| Abstract: | A Regge model with absorptive corrections is employed in a global analysis of the world data on the reactions  p   p and  n   n for photon energies from 3 to 18GeV. In this region resonance contributions are expected to be negligible so that the available experimental information on differential cross-sections and single and double polarization observables at - t  2 GeV2allows us to determine the reaction amplitude reliably. The model amplitude is then used to predict observables for photon energies below 3GeV. A detailed comparison with recent data from the CLAS and CB-ELSA Collaborations in that energy region is presented. Furthermore, the prospects for determining the  radiative decay width via the Primakoff effect from the reaction  p   p are explored. |
| Keywords: | PACS 11.55.Jy Regge formalism 13.60.Le Meson production 13.60.-r Photon and charged-lepton interactions with hadrons 25.20.Lj Photoproduction reactions |
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