| Thème(s) : |
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Physique/Physique Nucléaire Expérimentale
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| Titre : |
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Dielectron Production in $^{12} C+^{12}C$ Collisions at 1 GeV/u and the Solution to the DLS Puzzle |
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| Auteur : |
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Y. C. Pachmayer, G. Agakishiev, C. Agodi, A. Balanda, G. Bellia, D. Belver, A. Belayev, A. Blanco, M. Böhmer, J. L. Boyard1, P. Braun-Munzinger, P. Cabanelas, E. Castro, S. Chernenko, T. Christ, M. Destefanis, J. Diaz, F. Dohrmann, A. Dybczak, T. Eberl, L. Fabbietti, O. Fateev, P. Finocchiaro, P. Fonte, J. Friese, I. Fröhlich, T. Galatyuk, J. A. Garzon, R. Gernhäuser, A. Gil, C. Gilardi, M. Golubeva, D. Gonzalez-Diaz, E. Grosse, F. Guber, M. Heilmann, T. Hennino1, 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. Krasa, F. Krizek, R. Kücken, 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. Marin, J. Markert, V. Metag, B. Michalska, J. Michel, D. Mishra, E. Morinière1, J. Mousa, C. Müntz, L. Naumann, R. Novotny, J. Otwinowski, M. Palka, Y. Parpottas, V. Pechenov, O. Pechenova, T. Pérez Cavalcanti, J. Pietraszko, W. Przygoda, B. Ramstein1, A. Reshetin, M. Roy-Stephan1, A. Rustamov, A. Sadovsky, B. Sailer, P. Salabura, A. Schmah, R. Simon, Yu.G. Sobolev, S. Spataro, B. Spruck, H. Ströbele, J. Stroth, C. Sturm, M. Sudol, A. Tarantola, K. Teilab, P. Tlusty, M. Traxler, R. Trebacz, H. Tsertos, I. Veretenkin, V. Wagner, H. Wen, M. Wisniowski, T. Wojcik, J. Wüstenfeld, S. Yurevich, Y. Zanevsky, P. Zhou, P. Zumbruch |
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| Laboratoire : |
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| Résumé : |
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The production of e+e- pairs in $^{12}C+^{12}C$ collisions at 1 GeV/u was investigated with the HADES experiment at GSI, Darmstadt. In the invariant-mass region $ 0.15\: GeV/c^{2} \leq M_{ee} \leq 0.5\: GeV/c^{2}$ the measured pair yield shows a strong excess above the contribution expected from hadron decays after freeze-out. The data are in good agreement with the results of the former DLS experiment for the same system and energy. |
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| Collaboration/Projet : |
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HADES |
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| Type de publication : |
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Communications avec actes |
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Date de publication ou d'écriture : |
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2008 |
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| Date de la présentation : |
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2008 |
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Nom du périodique Titre de l'ouvrage : |
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QM2008 |
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| Audience : |
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internationale |
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| Nom du colloque : |
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Quark Matter 2008 |
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| Ville du colloque : |
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Jaipur |
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| Pays du colloque : |
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Inde |
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| Date du colloque (début) : |
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04/02/2008 |
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| Date du colloque (fin) : |
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10/02/2008 |
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| Speaker : |
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Y.C.Pachmayer |
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| Commentaire : |
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6 pages, 3 figures, conference proceedings: Quark Matter 2008, Jaipur (India), 4-10 February 2008, submitted to J. Phys. G: Nuclear and Particle Physics |
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