This title appears in the Scientific Report :
2011
Please use the identifier:
http://hdl.handle.net/2128/10288 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevC.84.015205 in citations.
Relevance of complex branch points for partial wave analysis
Relevance of complex branch points for partial wave analysis
A central issue in hadron spectroscopy is to deduce-and interpret-resonance parameters, namely, pole positions and residues, from experimental data, for those are the quantities to be compared to lattice QCD or model calculations. However, not every structure in the observables derives from a resona...
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Personal Name(s): | Ceci, S. |
---|---|
Döring, M. / Hanhart, C. / Krewald, S. / Meißner, U.-G. / Svarc, A. | |
Contributing Institute: |
Theorie der starken Wechselwirkung; IKP-3 |
Published in: | Physical Review C Physical review / C, 84 84 (2011 2011) 1 1, S. 015205 015205 |
Imprint: |
Woodbury, NY
Inst.
2011
2011-07-15 2011-07-01 |
Physical Description: |
015205 |
DOI: |
10.1103/PhysRevC.84.015205 |
Document Type: |
Journal Article |
Research Program: |
Study of Strongly Interacting Matter Physik der Hadronen und Kerne |
Series Title: |
Physical Review C
84 |
Subject (ZB): | |
Link: |
Get full text OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevC.84.015205 in citations.
A central issue in hadron spectroscopy is to deduce-and interpret-resonance parameters, namely, pole positions and residues, from experimental data, for those are the quantities to be compared to lattice QCD or model calculations. However, not every structure in the observables derives from a resonance pole: the origin might as well be branch points, either located on the real axis (when a new channel composed of stable particles opens) or in the complex plane (when at least one of the intermediate particles is unstable). In this paper we demonstrate first the existence of such branch points in the complex plane and then show on the example of the pi N P-11 partial wave that it is not possible to distinguish the structures induced by the latter from a true pole signal based on elastic data alone. |