EPJ Web Conf.
Volume 259, 2022The 19th International Conference of Strangeness in Quark Matter (SQM 2021)
|Number of page(s)||4|
|Published online||01 February 2022|
Early strangeness freeze-out from RHIC BES to LHC
1 Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao, Shandong, 266237, China
2 Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education, Shandong University, Qingdao, Shandong, 266237, China
3 State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei, Anhui, 230026, China
4 Brookhaven National Laboratory, Upton, New York, 11973, USA
* Speaker. e-mail: firstname.lastname@example.org
Published online: 1 February 2022
In this talk, we investigate the collision energy and particle species dependence of kinetic freeze-out properties in relativistic heavy ion collisions from √SNN = 7.7 - 200 GeV at Relativistic Heavy Ion Collider (RHIC) and 2.76 TeV at the Large Hadron Collider (LHC) with Tsallis Blast-Wave (TBW) model. Strangeness and non-strange particles show a similar radial flow, while the strange hadrons have higher temperature and smaller non-equilibrium degree. Strangeness approaches equilibrium more quickly than non-strange particles from peripheral to central collisions. The kinetic freeze-out temperature of non-strange particles in central collisions decreases from RHIC to LHC energies, while strangeness does not show this behavior. Finally we discuss the system bulk viscosity dependence on collision energy.
© The Authors, published by EDP Sciences, 2022
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