Study of the quasi-free np→npπ+π−np→npπ+π− reaction with a deuterium beam at 1.25 GeV/nucleon
- Agakishiev, G.
- Balanda, A.
- Belver, D.
- Belyaev, A.V.
- Blanco, A.
- Böhmer, M.
- Boyard, J.L.
- Braun-Munzinger, P.
- Cabanelas, P.
- Castro, E.
- Chernenko, S.
- Christ, T.
- Destefanis, M.
- Diaz, J.
- Dohrmann, F.
- Dybczak, A.
- Fabbietti, L.
- Fateev, O.V.
- Finocchiaro, P.
- Fonte, P.
- Friese, J.
- Fröhlich, I.
- Galatyuk, T.
- Garzón, J.A.
- Gernhäuser, R.
- Gil, A.
- Gilardi, C.
- Göbel, K.
- Golubeva, M.
- González-Díaz, D.
- Guber, F.
- Gumberidze, M.
- Hennino, T.
- Holzmann, R.
- Ierusalimov, A.
- Iori, I.
- Ivashkin, A.
- Jurkovic, M.
- Kämpfer, B.
- Karavicheva, T.
- Kirschner, D.
- Koenig, I.
- Koenig, W.
- Kolb, B.W.
- Kotte, R.
- Krizek, F.
- Krücken, R.
- Kühn, W.
- Kugler, A.
- Kurepin, A.
- Kurilkin, A.
- Kurilkin, P.
- Ladygin, V.
- Lang, S.
- Lange, J.S.
- Lapidus, K.
- Liu, T.
- Lopes, L.
- Lorenz, M.
- Maier, L.
- Mangiarotti, A.
- Markert, J.
- Metag, V.
- Michalska, B.
- Michel, J.
- Morinière, E.
- Mousa, J.
- Müntz, C.
- Naumann, L.
- Otwinowski, J.
- Pachmayer, Y.C.
- Palka, M.
- Parpottas, Y.
- Pechenov, V.
- Pechenova, O.
- Pietraszko, J.
- Przygoda, W.
- Ramstein, B.
- Reshetin, A.
- Rustamov, A.
- Sadovsky, A.
- Salabura, P.
- Schmah, A.
- Schwab, E.
- Sobolev, Yu.G.
- Spataro, S.
- Spruck, B.
- Ströbele, H.
- Stroth, J.
- Sturm, C.
- Tarantola, A.
- Teilab, K.
- Tlusty, P.
- Traxler, M.
- Trebacz, R.
- Tsertos, H.
- Wagner, V.
- Vasiliev, T.
- Weber, M.
- Wisniowski, M.
- Wojcik, T.
- Wüstenfeld, J.
- Yurevich, S.
- Zanevsky, Y.
- Zhou, P.
DOIAbstract
International audienceThe tagged quasi-free np→npπ+π−np→npπ+π− reaction has been studied experimentally with the High Acceptance Di-Electron Spectrometer (HADES) at GSI at a deuteron incident beam energy of 1.25 GeV/nucleon (View the MathML sources∼2.42 GeV/c for the quasi-free collision). For the first time, differential distributions of solid statistics for π+π−π+π− production in np collisions have been collected in the region corresponding to the large transverse momenta of the secondary particles. The invariant mass and angular distributions for the np→npπ+π−np→npπ+π− reaction are compared with different models. This comparison confirms the dominance of the t -channel with ΔΔ contribution. It also validates the changes previously int...
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