학술논문
The ASY-EOS experiment at GSI: investigating symmetry energy at supra-saturation densities
Document Type
article
Author
Russotto P.; Chartier M.; Cozma M.D.; De Filippo E.; Le Fèvre A.; Gannon S.; Gašparić I.; Kiš M.; Kupny S.; Leifels Y.; Lemmon R.C.; Li Q.; Łukasik J.; Marini P.; Pawłowski 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 M.; 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.; Krasznahorkay A.; Kurz N.; La Guidara E.; Lanzalone G.; Lasko P.; Lombardo I.; 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 E.; Rossi D.; Simon H.; Skwirczynska I.; Sosin Z.; Stuhl L.; Trifirò A.; Trimarchi M.; Tsang M.B.; Verde G.; Vigilante M.; Wieloch A.; Wigg P.; Wolter H.H.; Wu P.; Yennello S.; Zambon P.; Zetta L.; Zoric M.
Source
EPJ Web of Conferences, Vol 66, p 03074 (2014)
Subject
Language
English
ISSN
2100-014X
Abstract
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