Journal article

Measurement of the helicity asymmetry E for the reaction γp → π0p


Authors listGottschall, M.; Afzal, F.; Anisovich, A. V.; Bayadilov, D.; Beck, R.; Bichow, M.; Brinkmann, K. Th.; Crede, V.; Dieterle, M.; Dietz, F.; Dutz, H.; Eberhardt, H.; Elsner, D.; Ewald, R.; Fornet-Ponse, K.; Friedrich, St.; Frommberger, F.; Gridnev, A.; Gruner, M.; Gutz, E.; Hammann, Ch.; Hannappel, J.; Hartmann, J.; Hillert, W.; Hoffmeister, Ph.; Honisch, Ch.; Jude, T.; Kammer, S.; Kalinowsky, H.; Keshelashvili, I.; Klassen, P.; Klein, F.; Klempt, E.; Koop, K.; Krusche, B.; Kube, M.; Lang, M.; Lopatin, I.; Mahlberg, P.; Makonyi, K.; Metag, V.; Meyer, W.; Muller, J.; Mullers, J.; Nanova, M.; Nikonov, V.; Novotny, R.; Piontek, D.; Reicherz, G.; Rostomyan, T.; Sarantsev, A.; Schmidt, Ch.; Schmieden, H.; Seifen, T.; Sokhoyan, V.; Spieker, K.; Thiel, A.; Thoma, U.; Urban, M.; Pee, H. van; Walther, D.; Wendel, Ch.; Werthmuller, D.; Wiedner, U.; Wilson, A.; Winnebeck, A.; Witthauer, L.; Wunderlich, Y.

Publication year2021

JournalThe European Physical Journal A

Volume number57

Issue number1

ISSN1434-6001

eISSN1434-601X

Open access statusHybrid

DOI Linkhttps://doi.org/10.1140/epja/s10050-020-00334-2

PublisherSpringer


Abstract
A measurement of the double-polarization observable E for the reaction gamma p ->pi(0)p is reported. The data were taken with the CBELSA/TAPS experiment at the ELSA facility in Bonn using the Bonn frozen-spin butanol (C4H9OH) target, which provided longitudinally-polarized protons. Circularly-polarized photons were produced via bremsstrahlung of longitudinally-polarized electrons. The data cover the photon energy range from E-gamma = 600 to 2310 MeV and nearly the complete angular range. The results are compared to and have been included in recent partial wave analyses.



Citation Styles

Harvard Citation styleGottschall, M., Afzal, F., Anisovich, A., Bayadilov, D., Beck, R., Bichow, M., et al. (2021) Measurement of the helicity asymmetry E for the reaction γp → π0p, The European Physical Journal A, 57(1), Article 40. https://doi.org/10.1140/epja/s10050-020-00334-2

APA Citation styleGottschall, M., Afzal, F., Anisovich, A., Bayadilov, D., Beck, R., Bichow, M., Brinkmann, K., Crede, V., Dieterle, M., Dietz, F., Dutz, H., Eberhardt, H., Elsner, D., Ewald, R., Fornet-Ponse, K., Friedrich, S., Frommberger, F., Gridnev, A., Gruner, M., ...Wunderlich, Y. (2021). Measurement of the helicity asymmetry E for the reaction γp → π0p. The European Physical Journal A. 57(1), Article 40. https://doi.org/10.1140/epja/s10050-020-00334-2


Last updated on 2025-10-06 at 11:21