ASY-EOS experiment at GSI: investigating the symmetry enenrgy at supra-satutation densities

Russotto, P.; Chartier, M.; Cozma, M. D.; De Filippo, E.; Le Fevre, A.; Gannon, S.; Gašsparić, A.; Kiš, M.; Kupny, S.; Leifels, Y.; Lemmon, R.; Li, Q.; Lukasik, J.; Marini, P.; Pawlowski, P.; Santoro, S.; Trautmann, W.; Veselsky, M.; 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.; Bassini, R.; Benlliure, J.; Boiano, C.; Boisjoli, C.; Boretzky, K.; Brzychczyk, J.; Budzanowski, A.; Cardella, G.; Cammarata, P.; Chajecki, Z.; Chbihi, A.; Colonna, M.; Czech, B.; Di Toro, M.; Famiano, M.; Greco, V.; Grassi, L.; Guazzoni, C.; Guazzoni, P.; Heil, M.; Heilborn, L.; Introzzi, R.; Isobe, T.; Kezzar, K.; Krasznahorskay, A.; Kurz, N.; La Guidara, E.; Lanzalone, G.; Lasko, P.; Lombardo, Ivano; Lynch, W. G.; Matthews, Z.; May, L.; Minniti, T.; Mostazo, M.; Pagano, A.; Papa, M.; Pirrone, S.; Pleskac, R.; Politi, G.; Porto, F.; Reifarth, R.; Reisdorf, W.; Riccio, F.; Rizzo, F.; Rosato, Elio; Rossi, D.; Simon, H.; Skwirczynska, I.; Sosin, Z.; Stuhl, L.; Trifirò, A.; Trimarchi, . M.; Tsang, M. B.; Verde, G.; Vigilante, Mariano; Wieloch, A.; Wigg, P.; Wolter, H. H.; Wu, P.; Yennello, S.; Zambon, P.; Zetta, L.; Zoric, M.

doi:10.1051/epjconf/20146603074

The elliptic-flow ratio of neutrons with respect to protons or light complex particles in reactions of heavy-ions at pre-relativistic energies has been proposed as an observable sensitive to the strength of the symmetry term of the nuclear equation of state at supra-saturation densities. The results obtained from the existing FOPI/LAND data for 197Au+197Au collisions at 400 MeV/nucleon in comparison with the UrQMD model simulations favoured a moderately soft symmetry term, but suffer from a considerable statistical uncertainty. These results have been confirmed by an independent analysis based on the Tübingen QMD simulations. 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. The present status of the data analysis is reported

ASY-EOS experiment at GSI: investigating the symmetry enenrgy at supra-satutation densities / P., R., M., C., M. D., C., E., D.F., A., L.F., S., G., A., G., M., K., S., K., Y., L., R., L., Q., L.i., J., L., P., M., P., P., S., S., W., T., M., V., L., A., M., A., et al.. - In: EPJ WEB OF CONFERENCES. - ISSN 2101-6275. - 66:(2014). (INPC 2013 – International Nuclear Physics Conference Firenze June 2-7, 2013) [10.1051/epjconf/20146603074].