TY  - JOUR
A1  - Inghirami, Gabriele
A1  - Elfner, Hannah
T1  - The applicability of hydrodynamics in heavy ion collisions at √sNN = 2.4–7.7 GeV
T2  - The European Physical Journal C
N2  - To assess the degree of equilibration of the matter created in heavy-ion reactions at low to intermediate beam energies, a hadronic transport approach (SMASH) is employed. By using a coarse-graining method, we compute the energy momentum tensor of the system at fixed time steps and evaluate the degree of isotropy of the diagonal terms and the relative magnitude of the off-diagonal terms. This study focuses mostly on Au+Au collisions in the energy range s√NN
 = 2.4–7.7 GeV, but central collisions of lighter ions like C+C, Ar+KCl and Ag+Ag are considered as well. We find that the conditions concerning local equilibration for a hydrodynamic description are reasonably satisfied in a large portion of the system for a significant amount of time (several fm/c) when considering the average evolution of many events, yet they are rarely fulfilled on an event by event basis. This is relevant for the application of hybrid approaches at low beam energies as they are or will be reached by the HADES experiment at GSI, the future CBM experiment at FAIR as well as the beam energy scan program at RHIC.
Y1  - 2022
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/70991
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-709918
SN  - 1434-6052
SN  - 1434-6044
VL  - 82
IS  - 796
PB  - Springer
CY  - Berlin ; Heidelberg
ER  -