Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2006-01-19
Phys.Lett.B640:170-175,2006
Physics
Nuclear Physics
Nuclear Theory
12 pages, 4 figures; submitted to Phys.Lett. B
Scientific paper
10.1016/j.physletb.2006.07.041
Dileptons represent a unique probe for nuclear matter under extreme conditions reached in heavy-ion collisions. They allow to study meson properties, like mass and decay width, at various density and temperature regimes. Present days models allow generally a good description of dilepton spectra in ultra-relativistic heavy ion collision. For the energy regime of a few GeV/nucleon, important discrepancies between theory and experiment, known as the DLS puzzle, have been observed. Various models, including the one developed by the T\"{u}bingen group, have tried to address this problem, but have proven only partially successful. High precision spectra of dilepton emission in heavy-ion reactions at 1 and 2 GeV/nucleon will be released in the near future by the HADES Collaboration at GSI. Here we present the predictions for dilepton spectra in C+C reactions at 1 and 2 GeV/nucleon and investigate up to what degree possible scenarios for the in-medium modification of vector mesons properties are accessible by the HADES experiment.
Cozma M. D.
Fässler A.
Fuchs Ch.
Santini Elvira
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