Study of the pp → npπ+ reaction at 1.25 GeV with HADES

T. Liu, G. Agakishiev, C. Agodi, A. Balanda, G. Bellia, D. Belver, A. Belyaev, A. Blanco, M. Böhmer, J. L. Boyard, P. Braun-Munzinger, P. Cabanelas, E. Castro, T. Christ, M. Destefanis, J. Díaz, F. Dohrmann, A. Dybczak, L. Fabbietti, O. FateevP. Finocchiaro, P. Fonte, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzón, R. Gernhäuser, A. Gil, C. Gilardi, M. Golubeva, D. González-Díaz, E. Grosse, F. Guber, M. Heilmann, T. Hennino, R. Holzmann, A. Ierusalimov, I. Iori, A. Ivashkin, M. Jurkovic, B. Kämpfer, K. Kanaki, T. Karavicheva, D. Kirschner, I. Koenig, W. Koenig, B. W. Kolb, R. Kotte, A. Kozuch, A. Krása, F. Křížek, R. Krücken, W. Kühn, A. Kugler, A. Kurepin, J. Lamas-Valverde, S. Lang, J. S. Lange, K. Lapidus, L. Lopes, M. Lorenz, L. Maier, A. Mangiarotti, J. Marín, J. Marker, V. Metag, B. Michalska, J. Michel, D. Mishra, E. Morinière, J. Mousa, C. Müntz, L. Naumann, R. Novotny, J. Otwinowski, Y. C. Pachmayer, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, T. Pérez Cavalcanti, J. Pietraszko, W. Przygoda, B. Ramstein, A. Reshetin, A. Rustamov, A. Sadovsky, P. Salabura, A. Schma, R. Simon, Yu G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, M. Sudol, A. Tarantola, K. Teilab, P. Tlustý, M. Traxler, R. Trebacz, H. Tsertos, I. Veretenkin, V. Wagner, M. Weber, M. Wisniowski, J. Wüstenfeld, S. Yurevich, Y. V. Zanevsky, P. Zhou, P. Zumbruch

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In pp collisions at 1.25 GeV kinetic energy, the HADES collaboration aimed at investigating the di-electron production related to Δ (1232) Dalitz decay (Δ+ → pe+e-). In order to constrain the models predicting the cross section and the production mechanisms of A resonance, the hadronic channels have been measured and studied in parallel to the leptonic channels. The analyses of pp → npπ+ and pp → ppπ0 channels and the comparison to simulations are presented in this contribution, in particular the angular distributions being sensitive to Δ production and decay. The accurate acceptance corrections have been performed as well, which could be tested in all the phase space region thanks to the high statistic data. These analyses result in an overall agreement with the one-π exchange model and previous data.

Original languageEnglish
Title of host publicationProceedings of the 12th International Conference on Nuclear Reaction Mechanisms, NRM 2009
PublisherCERN
Pages423-429
Number of pages7
ISBN (Print)9789290833413
StatePublished - 2010
Event2009 12th International Conference on Nuclear Reaction Mechanisms, NRM 2009 - Varenna, Italy
Duration: 15 Jun 200919 Jun 2009

Publication series

NameCERN-Proceedings
Volume2
ISSN (Print)2078-8835

Conference

Conference2009 12th International Conference on Nuclear Reaction Mechanisms, NRM 2009
Country/TerritoryItaly
CityVarenna
Period15/06/0919/06/09

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