https://doi.org/10.1051/epjconf/202225903002
Strange Hadron Production in Au+Au Collisions at √SNN = 54.4 GeV
1 Engineer Physics Department, Tsinghua University
* e-mail: h-y12@tsinghua.org.cn
Published online: 1 February 2022
The RHIC Beam Energy Scan (BES) program was proposed to study the QCD phase transition. 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. Recently, the production of strange hadrons (KS0, Λ, Ξ, Ω, and ϕ) at mid-rapidity (|y|<0.5) in Au+Au collisions at √SNN = 54.4 GeV were measured by the STAR experiment at RHIC. In this paper nuclear modification factor, baryon-to-meson ratio, as well as the overall integrated yields of these strange hadrons at √SNN = 54.4 GeV are presented. In particular, the multi-strange baryon-to-meson ratio N(Ω− + Ω¯+)/[2N(ϕ)] is studied and compared to previous measurements from other BES energies. The strange-hadron-to-pion ratios versus charged hadron multiplicity are also studied and compared to the measurements in heavy-ion collisions at higher energies.
© The Authors, published by EDP Sciences, 2022
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