May 17 – 22, 2021
US/Eastern timezone

Early Strangeness freeze-out from RHIC BES to LHC

May 18, 2021, 11:50 AM
Room B (Zoom)

Room B


zoom co-host: Klaus Dehmelt


Jia Chen


In this talk, we investigate the kinetic freeze-out properties in relativistic heavy ion collisions at different collision energies. We present a study of standard Boltzmann-Gibbs Blast-Wave (BGBW) fits and Tsallis Blast-Wave (TBW) fits performed on the transverse momentum spectra of identified hadrons produced in Au + Au collisions at collision energies of $\sqrt{s_{\rm{NN}}}=$ 7.7 - 200~GeV at Relativistic Heavy Ion Collider (RHIC), and in Pb + Pb collisions at collision energies of $\sqrt{s_{\rm{NN}}}=$ 2.76 and 5.02~TeV at the Large Hadron Collider (LHC). The behavior of strange and multi-strange particles is also investigated. We found that in TBW fits, the strange hadrons, with higher temperature,similar radial flow and smaller non-equilibrium degree, approach equilibrium more quickly from peripheral to central collisions than light hadrons. We also observed that in TBW fits for non-strange particles the kinetic freeze-out temperature of the central collisions decreases from RHIC to LHC energies in TBW model, while strangeness does not show this behavior.

Primary authors

Jia Chen Li Yi (ShanDong University)

Presentation materials