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Skorodko, T.; Bashkanov, M.; Bogoslawsky, D.; Calén, H.; Clement, H.; Doroshkevich, E.; Demiroers, L.; Ekström, C.; Fransson, K.; Gustafsson, L.; Höistad, B.; Ivanov, G.; Jacewicz, M.; Jiganov, E.; Johansson, T.; Khakimova, O.; Keleta, S.; Koch, I.; Kren, F.; Kullander, S.; Kupść, A.; Marciniewski, P.; Meier, R.; Morosov, B.; Pauly, C.; Petrén, H.; Petukhov, Y.; Povtorejko, A.; Ruber, R. J. M. Y.; Schönning, K.; Scobel, W.; Shwartz, B.; Stepaniak, J.; Thörngren-Engblom, P.; Tikhomirov, V.; Wagner, G. J.; Wolke, M.; Yamamoto, A.; Zabierowski, J.; Zlomanczuk, J.
European physical journal. A, Hadrons and nuclei, 09/2011, Letnik: 47, Številka: 9Journal Article
First exclusive data for the reaction have been obtained at CELSIUS with the WASA detector setup at a beam energy of T p = 1.1 GeV. Total and differential cross-sections disagree with theoretical calculations, which predict the excitation to be the dominant process at this beam energy. Instead, the data require the excitation of one of the nucleons to a higher-lying state, preferably the , to be the leading process.
