Strange Hadron Production in Au+Au Collisions at $\sqrt{S_{NN}}=54.4 GeV$

The RHIC Beam Energy Scan (BES) Program is proposed to study the Quantum Chromodynamics phase transition and to locate the onset of deconfinement. As a sensitive probe to the transition from the hadron gas to the Quark-Gluon Plasma, the particle ratios of strange hadrons are measured to study the properties of nuclear matter and extract the chemical freeze-out parameters\footnote{\textbf{Phys.Rev.C}102,034909(2020)}\footnote{\textbf{Phys.Rev.C}96,044904(2017)} . Recently, the production of strange hadrons ($K_{S}^{0}$,$\Lambda$,$\bar{\Lambda}$,$\Xi^{-}$,$\bar{\Xi}^{+}$,$\Omega^{-}$,$\bar{\Omega}^{+}$,and $\phi$) at mid-rapidity (|$\eta$|<0.5) in Au+Au collisions at $\sqrt{S_{NN}}=54.4 GeV$ are measured at the Relativistic Heavy Ion Collider STAR experiment. In this talk, transverse momentum spectra, nuclear modification factor $R_{cp}$, baryon-to-meson ratio, as well as the overall integrated yields of these strange hadrons at 54.4 $GeV$ are presented. In particular, the multi-strange baryon-to-meson ratio $N(\Omega^{-}+\bar{\Omega}^{+})/[2N(\phi)])$ at 54.4 $GeV$ is studied and compared to previous measurement at other BES energies\footnote{\textbf{Phys.Rev.C}93,021903(R)(2016)}. The strange-hadron-to-pion ratios versus charged hadron multiplicity are also studied.