Model Dependence of the Properties of S11 Baryon Resonances

Details Model Dependence of the Properties of S11 Baryon Resonances Model Dependence of the Properties of S11 Baryon Resonances

2003-08-23

arxiv.org/abs/nucl-th/0308066v2

Phys.Rev. C69 (2004) 025205

Physics

Nuclear Physics

Nuclear Theory

24 pages, 10 figures; revised fits with error estimates, expanded comparison between CMB and K-matrix models

Scientific paper

10.1103/PhysRevC.69.025205

The properties of baryon resonances are extracted from a complicated process of fitting sophisticated, empirical models to data. The reliability of this process comes from the quality of data and the robustness of the models employed. With the large of amount of data coming from recent experiments, this is an excellent time for a study of the model dependence of this extraction process. A test case is chosen where many theoretical details of the model are required, the S11 partial wave. The properties of the two lowest N* resonances in this partial wave are determined using various models of the resonant and non-resonant amplitudes.

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