Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV

Publication Type
Journal Article
Year of Publication
2014
Authors
Agakishiev, G.
Balanda, A.
Belver, D.
Belyaev, A.
Berger-Chen, J. C.
Blanco, A.
Bohmer, M.
Boyard, J. L.
Cabanelas, P.
Chernenko, S.
Dybczak, A.
Epple, E.
Fabbietti, L.
Fateev, O.
Finocchiaro, P.
Fonte, P.
Friese, J.
Frohlich, I.
Galatyuk, T.
Garzon, J. A.
Gernhauser, R.
Gobel, K.
Golubeva, M.
Gonzalez-Diaz, D.
Guber, F.
Gumberidze, M.
Heinz, T.
Hennino, T.
Holzmann, R.
Ierusalimov, A.
Iori, I.
Ivashkin,A.
Jurkovic, M.
Kampfer, B.
Karavicheva, T.
Koenig, I.
Koenig, W.
Kolb, B. W.
Kornakov, G.
Kotte, R.
Krasa, A.
Krizek, F.
Krucken, R.
Kuc, H.
Kuhn, W.
Kugler, A.
Kurepin, A.
Ladygin, V.
Lalik, R.
Lang, S.
Lapidus, K.
Lebedev, A.
Liu, T.
Lopes, L.
Lorenz, M.
Maier, L.
Mangiarotti, A.
Markert, J.
Metag, V.
Michalska, B.
Michel, J.
Muntz, C.
Naumann, L.
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.
Siebenson, J.
Sobolev, Y. G.
Spataro, S.
Spruck, B.
Strobele, H.
Stroth, J.
Sturm, C.
Tarantola, A.
Teilab, K.
Tlusty, P.
Traxler, M.
Trebacz, R.
Tsertos, H.
Vasiliev, T.
Wagner, V.
Weber, M.
Wendisch, C.
Wustenfeld, J.
Yurevich, S.
Zanevsky, Y.
Name of Publication
European Physical Journal A
Volume
50
Issue
5
Date Published
May
Short Title
Baryon resonance production and dielectron decays in proton-proton collisions at 3.5 GeV
Accession Number
WOS:000335735700002
ISBN Number
1434-6001
Abstract

We report on baryon resonance production and decay in proton-proton collisions at a kinetic energy of 3.5 GeV based on data measured with HADES. The exclusive channels pp -> np pi(+) and pp -> pp pi(0) as well as pp -> ppe(+)e(-) are studied simultaneously for the first time. The invariant masses and angular distributions of the pion-nucleon systems were studied and compared to simulations based on a resonance model ansatz assuming saturation of the pion production by an incoherent sum of baryonic resonances (R) with masses pe(+)e(-) decays. Two models of the resonance decays into dielectrons are examined assuming a point-like RN gamma* coupling and the dominance of the rho meson. The results of model calculations are compared to data from the exclusive ppe(+)e(-) channel by means of the dielectron and pe(+)e(-) invariant mass distributions.