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

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arxiv 1407.2163 v1 pith:YCZ4STNE submitted 2014-07-08 nucl-ex

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

J. Hartmann , H. Dutz , A.V. Anisovich , D. Bayadilov , R. Beck , M. Becker , Y. Beloglazov , A. Berlin
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M. Bichow S. B\"ose K.-Th. Brinkmann V. Crede M. Dieterle H. Eberhardt D. Elsner K. Fornet-Ponse St. Friedrich F. Frommberger Ch. Funke M. Gottschall A. Gridnev M. Gr\"uner E. Gutz Ch. Hammann J. Hannappel V. Hannen J. Herick W. Hillert Ph. Hoffmeister Ch. Honisch O. Jahn T. Jude A. K\"aser D. Kaiser H. Kalinowsky F. Kalischewski P. Klassen I. Keshelashvili F. Klein E. Klempt K. Koop B. Krusche M. Kube M. Lang I. Lopatin K. Makonyi F. Messi V. Metag W. Meyer J. M\"uller M. Nanova V. Nikonov D. Novinski R. Novotny D. Piontek C. Rosenbaum B. Roth G. Reicherz T. Rostomyan A. Sarantsev Ch. Schmidt H. Schmieden R. Schmitz T. Seifen V. Sokhoyan Ph. Th\"amer A. Thiel U. Thoma M. Urban H. van Pee D. Walther Ch. Wendel U. Wiedner A. Wilson A. Winnebeck L. Witthauer Y. Wunderlich
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New data on the polarization observables T, P, and H for the reaction $\gamma p \to p\pi^0$ are reported. The results are extracted from azimuthal asymmetries when a transversely polarized butanol target and a linearly polarized photon beam are used. The data were taken at the Bonn electron stretcher accelerator ELSA using the CBELSA/TAPS detector. These and earlier data are used to perform a truncated energy-independent partial wave analysis in sliced-energy bins. This energy-independent analysis is compared to the results from energy-dependent partial wave analyses.

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