This title appears in the Scientific Report :
2009
Please use the identifier:
http://hdl.handle.net/2128/10373 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.nuclphysa.2009.08.010 in citations.
Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model.
Analytic properties of the scattering amplitude and resonances parameters in a meson exchange model.
The analytic properties of scattering amplitudes provide important information. Besides the cuts, the poles and zeros on the different Riemann sheets determine the global behavior of the amplitude on the physical axis. Pole positions and residues allow for a parameterization of resonances in a well-...
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Personal Name(s): | Döring, M. |
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Hanhart, C. / Huang, F. / Krewald, S. / Meissner, U.G. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 JARA - HPC; JARA-HPC |
Published in: |
Nuclear physics |
Imprint: |
Amsterdam
North-Holland Publ. Co.
2009
|
DOI: |
10.1016/j.nuclphysa.2009.08.010 |
Document Type: |
Journal Article |
Research Program: |
Physik der Hadronen und Kerne |
Series Title: |
Nuclear Physics A
829 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.nuclphysa.2009.08.010 in citations.
The analytic properties of scattering amplitudes provide important information. Besides the cuts, the poles and zeros on the different Riemann sheets determine the global behavior of the amplitude on the physical axis. Pole positions and residues allow for a parameterization of resonances in a well-defined way, free of assumptions for the background and energy dependence of the resonance part. This is a necessary condition to relate resonance contributions in different reactions. In the present study, we determine the pole structure of pion-nucleon scattering in an analytic model based on meson exchange. For this, the sheet structure of the amplitude is determined. To show the precision of the resonance extraction and discuss phenomena such as resonance interference, we discuss the S-11 amplitude in greater detail. (C) 2009 Elsevier B.V. All rights reserved. |