<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES"^^ . "The CERES experiment is devoted to the measurement of low-mass electron pairs in proton and ion-induced collisions at the Super Proton Synchrotron accelerator. The main goal of the CERES experiment is to investigate modifications of hadron properties in hot and dense nuclear matter. A significant enhancement of dilepton pair yield with respect to expectations based on hadron decays was observed in the mass range 0.25~$<~$m$_{ee}~<$~0.7~GeV/c$^2$. This fascinating result can only be described by models invoking in-medium modifications of the $\\rho$ meson. To distinguish between different theoretical explanations of the enhancement the experiment was upgraded in 1998 by the addition of a radial TPC to improve the mass resolution in the vector meson region. In this thesis, the analysis of the data sample taken in 2000 in 158~A~GeV/c Pb-Au collisions with the upgraded experimental setup is presented. The observed enhancement of the $e^+e^-$ pairs confirms previous results of CERES. The data, compared to the theoretical calculations based on dropping $\\rho$ mass approach and in-medium $\\rho$ spectral function modifications, favor the latter."^^ . "2006" . . . . . . . . "Sergey"^^ . "Yurevich"^^ . "Sergey Yurevich"^^ . . . . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (PDF)"^^ . . . "thesis.pdf"^^ . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Electron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #6558 \n\nElectron-Pair Production in 158 AGeV/c Pb-Au Collisions from CERES\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .