TY  - JOUR
A1  - Inghirami, Gabriele
A1  - Hees, Hendrik van
A1  - Endres, Stephan
A1  - Torres-Rincon, Juan M.
A1  - Bleicher, Marcus
T1  - Elliptic flow and RAA of D mesons at FAIR comparing the UrQMD hybrid model and the coarse-graining approach
T2  - The European physical journal. C, Particles and fields
N2  - We present a study of the elliptic flow and RAA of D and D¯ mesons in Au+Au collisions at FAIR energies. We propagate the charm quarks and the   D  mesons following a previously applied Langevin dynamics. The evolution of the background medium is modeled in two different ways: (I) we use the UrQMD hydrodynamics + Boltzmann transport hybrid approach including a phase transition to QGP and (II) with the coarse-graining approach employing also an equation of state with QGP. The latter approach has previously been used to describe di-lepton data at various energies very successfully. This comparison allows us to explore the effects of partial thermalization and viscous effects on the charm propagation. We explore the centrality dependencies of the collisions, the variation of the decoupling temperature and various hadronization parameters. We find that the initial partonic phase is responsible for the creation of most of the D/D¯ mesons elliptic flow and that the subsequent hadronic interactions seem to play only a minor role. This indicates that D/D¯ mesons elliptic flow is a smoking gun for a partonic phase at FAIR energies. However, the results suggest that the magnitude and the details of the elliptic flow strongly depend on the dynamics of the medium and on the hadronization procedure, which is related to the medium properties as well. Therefore, even at FAIR energies the charm quark might constitute a very useful tool to probe the quark–gluon plasma and investigate its physics.
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/49222
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-492229
SN  - 1434-6052
SN  - 1434-6044
N1  - Open Access: This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
VL  - 79
IS  - 1, Art. 52
SP  - 1
EP  - 22
PB  - Springer
CY  - Berlin ; Heidelberg
ER  -