Speaker
Ms
HUANG Yan
(Tsinghua University)
Description
The RHIC Beam Energy Scan (BES) program was 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 [1,2].
Recently, the production of strange hadrons (K_s^0,Λ,Λ ̅,Ξ^-,Ξ ̅^+,Ω^-,Ω ̅^+,and ϕ) at mid-rapidity (|y|<0.5) in Au+Au collisions at √(s_NN )=54.4 GeV were measured by the STAR experiment at RHIC. 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 √(s_NN )=54.4 GeV are presented. In particular, the multi-strange baryon-to-meson ratio N(Ω^-+Ω ̅^+)/[2N(ϕ)] at √(s_NN )=54.4 GeV is studied and compared to previous measurements at other BES energies [3]. 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.
[1] Phys. Rev. C 102, 034909 (2020)
[2] Phys. Rev. C 96, 044904 (2017)
[3] Phys. Rev. C 93, 021903(R) (2016)
| Topics | STAR+NICA+CBM Experiments |
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Primary author
Ms
HUANG Yan
(Tsinghua University)
