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Dielectron Production in $^{12} C+^{12}C$ Collisions at 1 GeV/u and the Solution to the DLS Puzzle

Y. C. Pachmayer G. Agakishiev C. Agodi A. Balanda G. Bellia D. Belver A. Belayev A. Blanco M. Böhmer J. L. Boyard 1 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. Hennino 1 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. Morinière 1 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. Ramstein 1 A. Reshetin M. Roy-Stephan 1 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 
Abstract : 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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https://hal.in2p3.fr/in2p3-00276559
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Submitted on : Wednesday, April 30, 2008 - 11:25:30 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:13 PM

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  • HAL Id : in2p3-00276559, version 1
  • ARXIV : 0804.3993

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Y. C. Pachmayer, G. Agakishiev, C. Agodi, A. Balanda, G. Bellia, et al.. Dielectron Production in $^{12} C+^{12}C$ Collisions at 1 GeV/u and the Solution to the DLS Puzzle. Quark Matter 2008, Feb 2008, Jaipur, India. ⟨in2p3-00276559⟩

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