Measurements of global and local polarization of1 hyperons in 200 GeV isobar collisions from STAR
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July 30, 2024
Abstract
In these proceedings, we present the measurements of global polarization for $\Lambda$, $\bar{\Lambda}$ with the high-statistics data collected by the STAR experiment for isobar (Ru+Ru, Zr+Zr) collisions at $\sqrt{s_{\mathrm{NN}}} = 200$ GeV. These measurements allow us to study possible magnetic field driven effects through the polarization difference and system size dependence of global polarization. Furthermore, we present the first measurements of $\Lambda$, $\bar{\Lambda}$ hyperon local polarization in isobar collisions at $\sqrt{s_{NN}}$= 200 GeV. Comparisons with previous measurements in Au+Au and Pb+Pb collisions at RHIC and LHC provide important insights into the collision system size and energy dependence of the vorticities.
DOI: https://doi.org/10.22323/1.456.0239
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.