Speaker
Xingrui Gou
Description
The observation of hyperon global polarization along the system's angular momentum has revealed the existence of large vorticities in the medium created by heavy-ion collisions.
Using the high-statistics data collected by the STAR experiment during the RHIC BES-II program with upgraded detector systems, we present the global polarization measurements for $\Xi^{\pm}$ and $\Omega^{\pm}$ hyperons in Au+Au collisions at BES-II energies ($\sqrt{s_{\mathrm{NN}}} = 7.7, 9.2, 11.5, 14.6, 17.3, 19.6, 27$ GeV).
These results provide new insights into the polarization mechanism and vorticity fields in heavy-ion collisions as well as additional constraints on the properties and dynamics of the hot and dense matter created in these collisions.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | STAR |
