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Double-polarization observable G in neutral-pion photoproduction off the proton

Thiel, A. and Eberhardt, H. and Lang, M. and Anisovich, A.V. and Afzal, F. and Bantes, B. and Bayadilov, D. and Beck, R. and Bichow, M. and Brinkmann, K. -T. and Böse, S. and Crede, V. and Dieterle, M. and Dutz, H. and D. Elsner, D and R. Ewald, R. and K. Fornet-Ponse, K. and St. Friedrich, St. and F. Frommberger, F. and Ch. Funke, Ch. and Goertz, St. and Gottschall, M. and Gridnev, A. and Gruener, M. and Gutz, E. and Hammann, D. and Hammann, Ch. and Hannappel, J. and Hartmann, J. and Hillert, W. and Hoffmeister, Ph. and Honisch, Ch. and Jude, T. and Kaiser, D. and Kalinowsky, H. and Kalischewski, F. and Kammer, S. and Keshelashvili, I. and Klassen, P. and Kleber, V. and Klein, F. and Klempt, E. and Koop, K. and Krusche, B. and Kube, M. and Lopatin, I. and Mahlberg, Ph. and Makonyi, K. and Metag, V. and Meyer, W. and Mueller, J. and Muellers, J. and Nanova, M. and Nikonov, V. and Piontek, D. and Reeve, S. and Reicherz, G. and Runkel, S. and Sarantsev, A. and Schmidt, Ch. and Schmieden, H. and Seifen, T. and Sokhoyan, V. and Spieker, K. and Thoma, U. and Urban, M. and van Pee, H. and Walther, D. and Wendel, Ch. and Wilson, A. and Winnebeck, A. and Witthauer, L.. (2017) Double-polarization observable G in neutral-pion photoproduction off the proton. European Physical Journal A: Hadrons and Nuclei, 53. p. 8.

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Official URL: http://edoc.unibas.ch/54086/

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Abstract

This paper reports on a measurement of the double-polarization observable G in π0 photoproduction off the proton using the CBELSA/TAPS experiment at the ELSA accelerator in Bonn. The observable G is determined from reactions of linearly polarized photons with longitudinally polarized protons. The polarized photons are produced by bremsstrahlung off a diamond radiator of well-defined orientation. A frozen spin butanol target provides the polarized protons. The data cover the photon energy range from 617 to 1325 MeV and a wide angular range. The experimental results for G are compared to predictions by the Bonn-Gatchina (BnGa), Jülich-Bonn (JüBo), MAID and SAID partial wave analyses. Implications of the new data for the pion photoproduction multipoles are discussed.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Hadronenphysik (Krusche)
UniBasel Contributors:Krusche, Bernd
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:EDP Sciences with Springer and Società Italiana di Fisica
ISSN:1434-6001
e-ISSN:1434-601X
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:27 Feb 2017 15:10
Deposited On:27 Feb 2017 15:06

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