ASY-EOS experiment at GSI

Russotto, P.; Acosta, L.; Adamczyk, M.; Al-Ajlan, A.; Al-Garawi, M.; Al-Homaidhi, S.; Amorini, F.; Auditore, L.; Aumann, T.; Ayyad, Y.; Baran, V.; Basrak, Z.; Benlliure, J.; Boiano, C.; Boisjoli, M.; Boretzky, K.; Brzychczyk, J.; Budzanowski, A.; Cardella, G.; Cammarata, P.; Cavallaro, S.; Chajecki, Z.; Chartier, M.; Chbihi, A.; Colonna, M.; Czech, B.; De Filippo, E.; Di Toro, M.; Famiano, M.; Le Fevre, A.; Gasparic, I.; Geraci, E.; Grassi, L.; Greco, V.; Guazzoni, C.; Guazzoni, P.; Heil, M.; Heilborn, L.; Introzzi, R.; Isobe, T.; Kezzar, K.; Kis, M.; Kupny, S.; Kurz, N.; La Guidara, E.; Lanzalone, G.; Lasko, P.; Leifels, Y.; Lemmon, R.; Li, Q.; Lombardo, I.; Loria, D.; Lukasik, J.; Lynch, W. G.; Marini, P.; Matthews, Z.; May, L.; Minniti, T.; Mostazo, M.; Pagano, A.; Papa, M.; Pawlowski, P.; Petrovici, M.; Pirrone, S.; Politi, G.; Porto, F.; Reifarth, R.; Reisdorf, W.; Riccio, F.; Rizzo, F.; Rosato, E.; Rossi, D.; Santoro, S.; Simon, H.; Skwirczynska, I.; Sosin, Z.; Trautmann, W.; Trifirò, A.; Trimarchi, M.; Tsang, B.; Veselsky, M.; Verde, G.; Vigilante, M.; Wieloch, A.; Wigg, P.; Wilczynski, J.; Wolter, H. H.; Wu, P.; Yennello, S.; Zambon, P.; Zetta, L.; Zoric, M.

doi:10.1051/epjconf/20123100012

The elliptic-flow ratio of neutrons with respect to protons in reactions of neutron rich Heavy-Ion at intermediate energies has been recently proposed as an observable sensitive to the strength of the symmetry term in the nuclear equation of state (EOS) at supra-saturation densities. The recent results obtained from the existing FOPI/LAND data for 197Au+197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model allowed a first estimate of the symmetry term of the EOS but suffer from a considerable statistical uncertainty. In order to obtain an improved data set for Au+Au collisions and to extend the study to other systems, a new experiment was carried out at the GSI laboratory by the ASY-EOS collaboration in May 2011.