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

• Published in: Physical review letters 2014-08, Vol.113 (6), p.062001-062001, Article 062001
• Main Authors: Hartmann, J, Dutz, H, Anisovich, A V, Bayadilov, D, Beck, R, Becker, M, Beloglazov, Y, Berlin, A, Bichow, M, Böse, S, Brinkmann, K-Th, Crede, V, Dieterle, M, Eberhardt, H, Elsner, D, Fornet-Ponse, K, Friedrich, St, Frommberger, F, Funke, Ch, Gottschall, M, Gridnev, A, Grüner, M, Gutz, E, Hammann, Ch, Hannappel, J, Hannen, V, Herick, J, Hillert, W, Hoffmeister, Ph, Honisch, Ch, Jahn, O, Jude, T, Käser, A, Kaiser, D, Kalinowsky, H, Kalischewski, F, Klassen, P, Keshelashvili, I, Klein, F, Klempt, E, Koop, K, Krusche, B, Kube, M, Lang, M, Lopatin, I, Makonyi, K, Messi, F, Metag, V, Meyer, W, Müller, J, Nanova, M, Nikonov, V, Novinski, D, Novotny, R, Piontek, D, Rosenbaum, C, Roth, B, Reicherz, G, Rostomyan, T, Sarantsev, A, Schmidt, Ch, Schmieden, H, Schmitz, R, Seifen, T, Sokhoyan, V, Thämer, Ph, Thiel, A, Thoma, U, Urban, M, van Pee, H, Walther, D, Wendel, Ch, Wiedner, U, Wilson, A, Winnebeck, A, Witthauer, L, Wunderlich, Y
• Format: Article
• Language: English
• Subjects: Accelerators; Asymmetry; Bins; Helicity; Photon beams; Photoproduction; Pions; Polarization
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.113.062001

New data on the polarization observables T, P, and H for the reaction γp→pπ(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.