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New data on the polarization observables T, P, and H for the reaction $\gammap \to p\pi^0$ are reported. The results are extracted from azimuthalasymmetries when a transversely polarized butanol target and a linearlypolarized photon beam are used. The data were taken at the Bonn electronstretcher accelerator ELSA using the CBELSA/TAPS detector. These and earlierdata are used to perform a truncated energy-independent partial wave analysisin sliced-energy bins. This energy-independent analysis is compared to theresults from energy-dependent partial wave analyses.

physical review letters

The N(1520) 3/2- helicity amplitudes from an energy-independent  multipole analysis based on new polarization data on photoproduction of  neutral pions