Dielectron production in 12C+12C collisions at 2 A GeV with HADES
Date
2007Author
Krücken, R.Markert, J.
Agakishiev, G.
Agodi, C.
Bałanda, A.
Bellia, G.
Belver, D.
Belyaev, A.
Blanco, A.
Böhmer, M.
Boyard, J. L.
Braun-Munzinger, P.
Cabanelas, Pablo
Castro, E.
Chernenko, S.
Christ, T.
Destefanis, M.
Diáz, J.
Dohrmann, F.
Dybczak, A.
Eberl, T.
Fabbietti, L.
Fateev, O.
Finocchiaro, P.
Fonte, P.
Friese, J.
Fröhlich, I.
Galatyuk, T.
Garzón, J. A.
Gernhäuser, R.
Gilardi, C.
Golubeva, M.
Gonzlez-Díaz, D.
Grosse, E.
Guber, F.
Heilmann, M.
Hennino, T.
Holzmann, R.
Ierusalimov, A.
Iori, I.
Ivashkin, A.
Jurkovic, M.
Kämpfer, B.
Kanaki, K.
Karavicheva, T.
Kirschner, D.
Koenig, I.
Koenig, W.
Kolb, B. W.
Kotte, R.
Kozuch, A.
Krizek, F.
Kühn, W.
Kugler, A.
Kurepin, A.
Lamas-Valverde, J.
Lang, S.
Lange, J. S.
Lopes, L.
Maier, L.
Mangiarotti, A.
Marín, J.
Markert, J.
Metag, V.
Michalska, B.
Mishra, D.
Morinière, E.
Mousa, J.
Müntz, C.
Naumann, L.
Novotny, R.
Otwinowski, J.
Pachmayer, Y. C.
Palka, M.
Pechenov, V.
Pechenova, O.
Cavalcanti, T. P.
Pietraszko, J.
Przygoda, W.
Ramstein, B.
Reshetin, A.
Roy-Stephan, M.
Rustamov, A.
Sadovsky, A.
Sailer, B.
Salabura, P.
Schmah, A.
Simon, R.
Spataro, S.
Spruck, B.
Ströbele, H.
Stroth, J.
Sturm, C.
Sudol, M.
Tarantola, A.
Teilab, K.
Tlusty, P.
Traxler, M.
Trebacz, R.
Tsertos, Haralambos
Veretenkin, I.
Wagner, V.
Wen, H.
Wisniowski, M.
Wojcik, T.
Wüstenfeld, J.
Yurevich, S.
Zanevsky, Y.
Zumbruch, P.
Source
Journal of Physics G: Nuclear and Particle PhysicsVolume
34Issue
8Pages
S1041-S1045Google Scholar check
Metadata
Show full item recordAbstract
We report on a measurement of electron pair production in 12C+12C collisions at an incident energy of 2 GeV per nucleon with the HADES spectrometer. The measured pair production probabilities span over five orders of magnitude from the π0-Dalitz to the ρ/ω invariant-mass region. Dalitz decays of π0 and η account for all the yield up to 0.15 GeV/c2, but for only about 50% above this mass. The excess yield is in agreement with the former DLS result if one assumes that it scales with beam energy like pion production. A preliminary analysis of 12C+12C collisions at an incident energy of 1 A GeV, measured with the HADES detector, supports this scenario. © 2007 IOP Publishing Ltd.