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HK: Fachverband Physik der Hadronen und Kerne
HK 13: Schwerionenkollisionen und QCD Phasen
HK 13.8: Talk
Monday, March 17, 2014, 18:30–18:45, HZ 7
Constraining the nuclear matter equation of state around twice the saturation density — •Arnaud Le Fèvre1, Yvonne Leifels1, Willibrord Reisdorf1, Jörg Aichelin2, Christoph Hartnack2, and Norbert Hermann3 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — 2SUBATECH, Université de Nantes, IN2P3/CNRS, France — 3Physikalisches Institut der Universität Heidelberg, Heidelberg, Germany
From FOPI experimental data on elliptic flow of protons, we extract constraints for the equation of state (EOS) of compressed symmetric nuclear matter using the transport code IQMD. The best agreement with the data is obtained with the soft EOS assumption, including a momentum dependent interaction. The code predicts that the mean characteristical density related to the measured flow is around twice the saturation density. It shows how important is the interplay between the fireball and the spectator matter in the relativistic heavy-ion collisions in order to have the necessary sensitivity of the elliptic flow on the stiffness of the EOS.