TY - JOUR A1 - Bratkovskaya, Elena L. A1 - Linnyk, Olena A1 - Cassing, Wolfgang A1 - Stöcker, Horst T1 - Charmed signatures for phase transitions in heavy-ion collisions T2 - Proceedings of Science N2 - The interplay of charmonium production and suppression in In+In and Pb+Pb reactions at 158 AGeV and in Au+Au reactions at sqrt(s)=200 GeV is investigated with the HSD transport approach within the hadronic comover model' and the QGP melting scenario'. The results for the J/Psi suppression and the Psi' to J/Psi ratio are compared to the recent data of the NA50, NA60, and PHENIX Collaborations. We find that, at 158 AGeV, the comover absorption model performs better than the scenario of abrupt threshold melting. However, neither interaction with hadrons alone nor simple color screening satisfactory describes the data at sqrt(s)=200 GeV. A deconfined phase is clearly reached at RHIC, but a theory having the relevant degrees of freedom in this regime (strongly interacting quarks/gluons) is needed to study its transport properties. Y1 - 2007 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/6242 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-58405 UR - https://pos.sissa.it/047/042/pdf SN - 1824-8039 N1 - © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. VL - 2007 IS - (CPOD07)042 SP - 1 EP - 10 PB - SISSA CY - Trieste ER -