Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 54: Heavy Ion Collisions and QCD Phases 7

HK 54.2: Vortrag

Donnerstag, 26. März 2015, 15:00–15:15, T/SR14

Directed flow in heavy-ion collisions from PHSD transport approach — Wolfgang Cassing, Volodya Konchakovski, and •Alessia Palmese — Institute for Theoretical Physics, Justus-Liebig-Universität, Gießen, Germany

We study the proton and kaon directed and elliptic flows for Au+Au collisions at AGS energies (E_Lab=2-8 AGeV) and low SPS energies up to √s_NN=7.7 GeV within the Parton-Hadron-String-Dynamics (PHSD/HSD) transport models. PHSD is a microscopic off-shell transport approach, which successfully describes heavy-ion collisions in a wide range of energies, and HSD represents the hadronic sector of PHSD. We compare our results with data from the E895 and STAR Collaborations and we investigate the sensitivity of the flow observables with respect to momentum-dependent hadronic potentials. This analysis can provide important information on these potentials, since they are known from the G-matrix theory approximately up to twice nuclear matter density and consequently extrapolations at higher baryon densities and large momenta have to been probed. We also explore the possibility that the flow observables are influenced by chiral symmetry restoration, that is expected to occur at high density and/or temperature.