1. Exclusive Measurements of pp to dpi+pi0: Double-Pionic Fusion without ABC Effect
- Author
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Kren, F., Bashkanov, M., Bogoslawsky, D., Calen, H., Clement, H., Demiroers, L., Ekstrom, C., Fransson, k., Greiff, J., Gustafsson, L., Hoistad, B., Ivanov, G., Jacewicz, M., Jiganov, E., Kohansson, T., Khakimova, O., Keleta, S., Koch, I., Kullander, S., Kupsc, A., Marciniewski, P., Meier, R., Morosov, B., Pauly, C., Petren, H., Petukhov, Y., Povtoreijko, A., Ruber, R. J. M. Y., Schonning, K., Scobel, W., Skorodko, T., Shwartz, B., Stepaniak, J., Thorngren-Engblom, P., Tikhomirov, V., Wagner, G. J., Wolke, M., Yamamoto, A., Zabierowski, J., and Zlomanczuk, J.
- Subjects
exclusive reaction [p p] ,fusion ,Dalitz plot ,isovector ,four-pi-detector ,energy dependence [channel cross section] ,+deuteron+pi%2B+pi0%22">p p --> deuteron pi+ pi0 ,Delta(1232) ,Uppsala CELSIUS Stor ,mass spectrum ,pair production [pi] ,High Energy Physics::Experiment ,ddc:530 ,Nuclear Experiment - Abstract
Exclusive measurements of the reaction pp -> dpi+pi0 have been carried out at T_p = 1.1 GeV at the CELSIUS storage ring using the WASA detector. The isovector pi+pi0 channel exhibits no enhancement at low invariant pipi masses, i. e. no ABC effect. The differential distributions are in agreement with the conventional t-channel Delta-Delta excitation process, which also accounts for the observed energy dependence of the total cross section. This is an update of a previously published version -- see important note at the end of the article.
- Published
- 2011