Speaker
Description
One of the main goals of the STAR experiment is to map the QCD phase diagram. The flow harmonics of azimuthal anisotropy ($v_{2}$ and $v_{3}$) of particles are sensitive to the initial dynamics of the medium. The first phase of RHIC Beam Energy Scan Phase-I (BES-I) program demands a precision measurement of $v_{2}$ and $v_{3}$ specifically for $\phi$ mesons and multi-strange hadrons in the low energy regimes.
STAR has recently finished the data taking for Beam Energy Scan Phase-II (BES-II) program with higher statistics, improved detector condition, and wider pseudorapidity coverage compared to what was available during BES-I program. In this talk, we will present the measurements of $v_{2}$ and $v_{3}$ of strange and multi-strange hadrons ($K_{S}^{0}$, $\Lambda (\bar{\Lambda})$, $\phi$, $\Xi^{-} (\bar{\Xi}^{+})$, and $\Omega^{-} (\bar{\Omega}^{+})$) at $\sqrt{s_{NN}}$ = 14.6 and 19.6 GeV. The centrality dependence, the number of constituent quark (NCQ) scaling, and baryon to anti-baryon difference in $v_{2}$ and $v_{3}$ will be presented. Finally, the physics implications of our measurements in the context of partonic collectivity will be discussed.
| In-person participation | No |
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