scholarly journals Dynamical freeze-out criterion in a hydrodynamical description of Au + Au collisions at sNN=200 GeV and Pb + Pb collisions at sNN=2760 GeV

2017 ◽  
Vol 95 (5) ◽  
Author(s):  
Saeed Ahmad ◽  
Hannu Holopainen ◽  
Pasi Huovinen
Keyword(s):  
200 Gev ◽  
Hydrodynamical Description ◽  
Freeze Out

scholarly journals Kaon femtoscopy in Au+Au collisions at √SNN = 200 GeV at the STAR experiment

2018 ◽  
Vol 171 ◽  
pp. 16001
Author(s):  
Jindřich Lidrych
Keyword(s):  
Blast Wave ◽  
Collision Energy ◽  
Preliminary Results ◽  
200 Gev ◽  
Star Experiment ◽  
Freeze Out

In this proceedings, the STAR preliminary results on femtoscopic correlations of identical kaons from Au+Au collisions at [see formula in PDF] =200 GeV are presented. The measured kaon source radii are studied as a function of collision energy as well as centrality and transverse pair mass mT. In addition, extracted kaon blast-wave freeze-out parameters are presented.

scholarly journals Anisotropic (v1 and v2) Flow in Relativistic Heavy-Ion Collisions at Energies between 4 GeV and 200 GeV

2018 ◽  
Vol 191 ◽  
pp. 05004
Author(s):  
L.V. Bravina ◽  
Yu. Kvasiuk ◽  
S.Yu. Sivoklokov ◽  
O. Vitiuk ◽  
E.E. Zabrodin
Keyword(s):  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Relativistic Heavy Ion Collisions ◽  
High Energies ◽  
Ion Collisions ◽  
200 Gev ◽  
Basic Features ◽  
String Models ◽  
Freeze Out

Basic features of directed and elliptic flows of identified hadrons in heavy-ion collisions at intermediate and high energies are considered within two transport string models, UrQMD and QGSM. Both models indicate changing of the sign of proton directed flow at midrapidity from antiflow to normal flow with decreasing energy of collisions. The origin of this effect is traced to hadron rescattering in baryon-rich remnants of the colliding nuclei. To distinguish the effect of rescattering from the flow softening caused by creation of quark-gluon plasma one has to compare heavy-ion and light-ion collisions at the same energy. Both directed and elliptic flows at midrapidity are formed within t = 10-12 fm/c. The differences in the development of elliptic flows of mesons and baryons are found at high energies. These differences can be explained by dissimilar freeze-out conditions, thus suggesting simultaneous study of particle collective flow and freeze-out.

scholarly journals SYSTEM SIZE DEPENDENCE OF FREEZE-OUT PROPERTIES AT RHIC

2007 ◽  
Vol 16 (07n08) ◽  
pp. 1800-1805 ◽  
Author(s):  
◽  
ANETA IORDANOVA ◽  
OLGA BARANNIKOVA ◽  
RICHARD HOLLIS
Keyword(s):  
Energy Density ◽  
Statistical Model ◽  
Systematic Study ◽  
Collision Energy ◽  
Size Dependence ◽  
Energy System ◽  
System Size ◽  
200 Gev ◽  
Star Experiment ◽  
Freeze Out

The STAR experiment at RHIC has measured identified π±, K± and [Formula: see text] spectra and ratios from [Formula: see text] and 200 GeV Cu + Cu collisions. The new Cu + Cu results are studied with hydro-motivated blast-wave and statistical model frameworks in order to characterize the freeze-out properties of this system. Along with measurements from Au + Au and p + p collisions, the obtained freeze-out parameters are discussed as a function of collision energy, system size, centrality and inferred energy density. This multi-dimensional systematic study reveals the importance of the collision geometry and furthers our understanding of the QCD phases.

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