# Online Strangeness in Quark Matter Conference 2021

May 17 – 22, 2021
US/Eastern timezone

## Early Strangeness freeze-out from RHIC BES to LHC

May 18, 2021, 11:50 AM
20m
Room B (Zoom)

### Room B

#### Zoom

zoom co-host: Klaus Dehmelt https://stonybrook.zoom.us/j/98548694974
Theory talk

Jia Chen

### Description

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

Li Yi (ShanDong University)

### Presentation materials

 JiaChen-SQM2021.pdf JiaChen-SQM2021.pptx