{ "id": "nucl-th/0210032", "version": "v1", "published": "2002-10-09T21:16:59.000Z", "updated": "2002-10-09T21:16:59.000Z", "title": "Dileptons and Photons from Coarse-Grained Microscopic Dynamics and Hydrodynamics Compared to Experimental Data", "authors": [ "Joseph Kapusta" ], "comment": "4 pages, 10 figures, Quark Matter 2002 proceedings", "journal": "Nucl.Phys. A715 (2003) 709-712", "doi": "10.1016/S0375-9474(02)01472-0", "categories": [ "nucl-th" ], "abstract": "We compute the radiation of dileptons and photons using relativistic hydrodynamics and a coarse-grained version of the microscopic event generator UrQMD, both of which provide a good description of the hadron spectra. The currently most accurate dilepton and photon emission rates from perturbative QCD and from experimentally-based hadronic calculations are used. Comparisons are made to data on central Pb-Pb and Pb-Au collisions taken at the CERN SPS at a beam energy of 158 A GeV. Both hydrodynamics and UrQMD provide very good descriptions of the photon transverse momentum spectrum measured between 1 and 4 GeV, but very slightly underestimate the low mass spectrum of e+e- pairs, even with greatly broadened rho and omega vector mesons.", "revisions": [ { "version": "v1", "updated": "2002-10-09T21:16:59.000Z" } ], "analyses": { "keywords": [ "coarse-grained microscopic dynamics", "experimental data", "hydrodynamics", "transverse momentum spectrum", "microscopic event generator urqmd" ], "tags": [ "journal article" ], "publication": { "publisher": "Elsevier", "journal": "Nucl. Phys. A" }, "note": { "typesetting": "TeX", "pages": 4, "language": "en", "license": "arXiv", "status": "editable", "inspire": 599405 } } }