Latest documents http://publikationen.stub.uni-frankfurt.de/index/index/ Thu, 27 Oct 2005 15:14:36 +0200 Thu, 27 Oct 2005 15:14:36 +0200 http://publikationen.stub.uni-frankfurt.de/frontdoor/index/index/docId/3433 Transverse hadron spectra from proton-proton, proton-nucleus and nucleus-nucleus collisions from 2 AGeV to 21.3 ATeV are investigated within two independent transport approaches (HSD and UrQMD). For central Au+Au (Pb+Pb) collisions at energies above E lab ~ 5 AGeV, the measured K +- transverse mass spectra have a larger inverse slope parameter than expected from the default calculations. The additional pressure - as suggested by lattice QCD calculations at finite quark chemical potential mu q and temperature T - might be generated by strong interactions in the early pre-hadronic/partonic phase of central Au+Au (Pb+Pb) collisions. This is supported by a non-monotonic energy dependence of v2/pT in the present transport model. Marcus Bleicher; Elena L. Bratkovskaya; Sascha Vogel; Xianglei Zhu preprint http://publikationen.stub.uni-frankfurt.de/frontdoor/index/index/docId/3433 Thu, 27 Oct 2005 15:14:36 +0200