XIXth Workshop on High Energy Spin Physics dedicated to 90th anniversary of A.V. Efremov birth

Global polarization of Ξ hyperons in Au+Au collisions in the STAR experiment

6 Sept 2023, 18:10

20m

BLTP Conference Hall (JINR)

Plenary

Speaker

Alpatov, Egor (NRNU MEPhI)

Description

The study of global polarization in heavy-ion collisions has revealed the presence of a vortical fluid with significant angular momentum and vorticity. This phenomenon can be observed through weak decays of particles such $\mathrm{\Lambda }$ hyperons. Experimental data of $\mathrm{\Lambda }$ global polarization from RHIC and LHC provided
opportunity to get new insights into the collective behavior and hydrodynamic description of
the system.

Global polarization of multistrange hyperons, such as $\mathrm{\Xi }$, can provide new information for hydrodynamic description of the system and its vorticity structure. In this talk, we will report results of $\mathrm{\Xi }$ global polarization measurement for Au+Au collisions at $\sqrt{s_{NN}}$ = 19.6 and 27 GeV.

Presentation materials

DSPIN-2023_v2.pdf