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; M Bichow; S Böse; 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 Grüner; E Gutz; Ch Hammann; J Hannappel; V Hannen; J Herick; W Hillert; Ph Hoffmeister; Ch Honisch; O Jahn; T Jude; A Käser; 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 Müller; 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 Thämer; A Thiel; U Thoma; M Urban; H van Pee; D Walther; Ch Wendel; U Wiedner; A Wilson; A Winnebeck; L Witthauer; Y Wunderlich; CBELSA/TAPS Collaboration

doi:10.1103/PhysRevLett.113.062001

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

Phys Rev Lett. 2014 Aug 8;113(6):062001. doi: 10.1103/PhysRevLett.113.062001. Epub 2014 Aug 4.

Authors

J Hartmann¹, H Dutz², A V Anisovich³, D Bayadilov³, R Beck¹, M Becker¹, Y Beloglazov⁴, A Berlin⁵, M Bichow⁵, S Böse¹, K-Th Brinkmann⁶, V Crede⁷, M Dieterle⁸, H Eberhardt², D Elsner², K Fornet-Ponse², St Friedrich⁹, F Frommberger², Ch Funke¹, M Gottschall¹, A Gridnev⁴, M Grüner¹, E Gutz⁶, Ch Hammann¹, J Hannappel², V Hannen⁹, J Herick⁵, W Hillert², Ph Hoffmeister¹, Ch Honisch¹, O Jahn², T Jude², A Käser⁸, D Kaiser¹, H Kalinowsky¹, F Kalischewski¹, P Klassen¹, I Keshelashvili⁸, F Klein², E Klempt¹, K Koop¹, B Krusche⁸, M Kube¹, M Lang¹, I Lopatin⁴, K Makonyi⁹, F Messi², V Metag⁹, W Meyer⁵, J Müller¹, M Nanova⁹, V Nikonov³, D Novinski⁴, R Novotny⁹, D Piontek¹, C Rosenbaum¹, B Roth⁵, G Reicherz⁵, T Rostomyan⁸, A Sarantsev³, Ch Schmidt¹, H Schmieden², R Schmitz¹, T Seifen¹, V Sokhoyan¹, Ph Thämer¹, A Thiel¹, U Thoma¹, M Urban¹, H van Pee¹, D Walther¹, Ch Wendel¹, U Wiedner⁵, A Wilson¹⁰, A Winnebeck¹, L Witthauer⁸, Y Wunderlich¹; CBELSA/TAPS Collaboration

Affiliations

¹ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany.
² Physikalisches Institut, Universität Bonn, 53115 Bonn, Germany.
³ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany and Petersburg Nuclear Physics Institute, Gatchina 188300, Russia.
⁴ Petersburg Nuclear Physics Institute, Gatchina 188300, Russia.
⁵ Institut für Experimentalphysik I, Ruhr-Universität Bochum, 44780 Bochum, Germany.
⁶ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany and II. Physikalisches Institut, Universität Gießen, 35392 Gießen, Germany.
⁷ Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.
⁸ Department Physik, Universität Basel, 4056 Basel, Switzerland.
⁹ II. Physikalisches Institut, Universität Gießen, 35392 Gießen, Germany.
¹⁰ Helmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, Germany and Department of Physics, Florida State University, Tallahassee, Florida 32306, USA.

PMID: 25148317
DOI: 10.1103/PhysRevLett.113.062001

Abstract

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.