This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1140/epja/i2007-10482-6 in citations.
Please use the identifier: http://hdl.handle.net/2128/10511 in citations.
Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
Regge approach to charged-pion photoproduction at invariant energies above 2 GeV
A Regge model with absorptive corrections is employed in a global analysis of the world data on positive and negative pion photoproduction for photon energies from 3 to 8GeV. In this region resonance contributions are expected to be negligible so that the available experimental information on differ...
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Personal Name(s): | Sibirtsev, A. |
---|---|
Haidenbauer, J. / Krewald, S. / Lee, T.-S. H. / Meissner, U.G. / Thomas, A. W. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 Jülich-Aachen Research Alliance - Simulation Sciences; JARA-SIM |
Published in: | The @European physical journal / A, 34 (2007) S. 49 - 68 |
Imprint: |
Berlin
Springer
2007
|
Physical Description: |
49 - 68 |
DOI: |
10.1140/epja/i2007-10482-6 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
European Physical Journal A
34 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/10511 in citations.
A Regge model with absorptive corrections is employed in a global analysis of the world data on positive and negative pion photoproduction for photon energies from 3 to 8GeV. In this region resonance contributions are expected to be negligible so that the available experimental information on differential cross-sections and single polarization observables at - t <= 2 GeV2 allows us to determine the non-resonant part of the reaction amplitude reliably. The model amplitude is then used to predict observables for photon energies below 3GeV. Differences between our predictions and data in this energy region are systematically examined as possible signals for the presence of excited baryons. We find that the data available for the polarized photon asymmetry show promising resonance signatures at invariant energies around 2GeV. With regard to differential cross-sections the analysis of negative pion photoproduction data, obtained recently at JLab, indicates likewise the presence of resonance structures around 2GeV. |