TY - JOUR A1 - Bratkovskaya, Elena L. A1 - Cassing, Wolfgang A1 - Linnyk, Olena T1 - Low mass dilepton production at ultrarelativistic energies T2 - Physics Letters B N2 - Dilepton production in pp and Au+Au nucleus–nucleus collisions at s=200GeV as well as in In+In and Pb+Au at 158AGeV is studied within the microscopic HSD transport approach. A comparison to the data from the PHENIX Collaboration at RHIC shows that standard in-medium effects of the ρ,ω vector mesons—compatible with the NA60 data for In+In at 158AGeV and the CERES data for Pb+Au at 158AGeV—do not explain the large enhancement observed in the invariant mass regime from 0.2 to 0.5 GeV in Au+Au collisions at s=200 GeV relative to pp collisions. KW - Relativistic heavy-ion collisions KW - Meson production KW - Leptons Y1 - 2008 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/76453 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-764530 SN - 0370-2693 VL - 670.2009 IS - 4-5 SP - 428 EP - 433 PB - Elsevier CY - Amsterdam ER -