Baryon Spectroscopy - Recent results from the Crystal Barrel Experiment at ELSA -*
Helmholtz-Institut für Strahlen- und Kernphysik, Universität
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To understand the spectrum and the properties of baryon resonances, the CBELSA/TAPS experiment investigates the photoproduction oﬀ the nucleon using linearly, circularly polarized or unpolarized photons impinging on a polarized or unpolarized target. Preliminary results on ﬁrst double polarization observables have been obtained for the reactions → pπ0 and → pη using both circular and linear polarized photons on a longitudinally polarized target. This data will ﬁnally provide important information for the partial wave analyzes used to extract the resonances from the data.
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