A1 Journal article (refereed)
Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations (2019)


Inghirami, Gabriele; Hillmann, Paula Christine; Tomášik, Boris; Bleicher, Marcus (2019). Temperatures and chemical potentials at kinetic freeze-out in relativistic heavy ion collisions from coarse grained transport simulations. Journal of Physics G: Nuclear and Particle Physics, Early online. DOI: 10.1088/1361-6471/ab53f4


JYU authors or editors


Publication details

All authors or editors: Inghirami, Gabriele; Hillmann, Paula Christine; Tomášik, Boris; Bleicher, Marcus
Journal or series: Journal of Physics G: Nuclear and Particle Physics
ISSN: 0954-3899
eISSN: 1361-6471
Publication year: 2019
Volume: Early online
Publisher: Institute of Physics
Publication country: United Kingdom
Publication language: English
Open Access: Publication channel is not openly available
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/66286
Web address of parallel published publication (pre-print): https://arxiv.org/abs/1909.00643


Abstract

Using the UrQMD/coarse graining approach we explore the kinetic freeze-out stage in central Au + Au collisions at various energies. These studies allow us to obtain detailed information on the thermodynamic properties (e.g. temperature and chemical potential) of the system during the kinetic decoupling stage. We explore five relevant collision energies in detail, ranging from √sNN=2.4 GeV (GSI-SIS) to √sNN=200 GeV (RHIC). By adopting a standard Hadron Resonance Gas equation of state, we determine the average temperature〈T〉and the average baryon chemical potential〈μB〉on the space-time hyper-surface of last interaction. The results highlight the nature of the kinetic freeze-out as a continuous process. This differential decoupling is an important aspect often missed when summarizing data as single points in the phase diagram as e.g. done in Blast-Wave fits. We compare the key properties of the system derived by using our approach with other models and we briefly review similarities and differences.


Contributing organizations


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Ministry reporting: No, publication in press
Preliminary JUFO rating: 2

Last updated on 2019-08-11 at 16:16