Azimuthal anisotropy measurement of multi-strange hadrons in Au+Au collision at $\sqrt{s_{NN}}$ = 27 and 54.4 GeV at STAR

TL;DR

This paper reports measurements of azimuthal anisotropy ($v_2$ and $v_3$) for strange and multi-strange hadrons in Au+Au collisions at 27 and 54.4 GeV, exploring their centrality dependence and quark scaling behaviors.

Contribution

It provides new anisotropy measurements for multi-strange hadrons at these energies, including the first analysis of $v_2$ ratios indicating possible mass ordering violation.

Findings

Centrality dependence of $v_2$ and $v_3$ observed.

Number of constituent quark scaling discussed.

Hints of mass ordering violation at low $p_T$ for $ ext{v}_2$ ratio.

Abstract

In these proceedings, we present the second order ($v_{2}$) and the third order ($v_{3}$) azimuthal anisotropy measurements of strange and multi-strange hadrons such as $K^{0}_{S}$, $\Lambda$, $\bar{\Lambda}$, $\phi$, $\Xi^{-}$, $\bar{\Xi}^{+}$, $\Omega^{-}$, $\bar{\Omega}^{+}$ in Au+Au collisions at $\sqrt{s_{NN}}$ = 27 and 54.4 GeV at STAR. The centrality dependence of $v_{2}$ and $v_{3}$ as well as the number of constituent quark scaling (NCQ scaling) for all the particles mentioned above are discussed. The ratio of $v_{2}$ of $\phi$ mesons to that of $\bar{p}$ is presented at $\sqrt{s_{NN}}$ = 54.4 GeV which gives a hint of mass ordering violation at low $p_{T}$.