Time delayed K+ N reactions and exotic baryon resonances

Details Time delayed K+ N reactions and exotic baryon resonances Time delayed K+ N reactions and exotic baryon resonances

2003-07-09

arxiv.org/abs/hep-ph/0307134v2

J.Phys.G29:1001-1009,2003

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages LaTex, 3 figures, references added in Note after publication

Scientific paper

10.1088/0954-3899/29/6/303

Evidences and hints, both from the theoretical and experimental side, of exotic baryon resonances with B=S, have been with us for the last thirty years. The poor status of the general acceptance of these Z* resonances is partly due to the prejudice against penta-quark baryons and partly due to the opinion that a proof of the existence of exotic states must be rigorous. This can refer to the quality and amount of data gathered, and also to the analytical methods applied in the study of these resonances. It seems then mandatory that all possibilities and aspects be exploited. We do that by analyzing the time delay in K+ N scattering, encountering clear signals of the exotic Z* resonances close to the pole values found in partial wave analyses.

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