Strangeness production in different collision systems and at different collision energies with the STAR experiment

Strangeness production has been suggested as a sensitive probe to the early dynamics of the deconfined matter created in heavy-ion collisions. In these proceedings, we report new measurements of strange hadron (Ks0, Λ, Λ̅, Ξ, Ξ̅, ϕ, Ω, Ω̅) production in Au+Au collisions at √sNN = 7.7, 9.2, 11.5, 14.6, 19.6 GeV and in O+O, Zr+Zr and Ru+Ru collisions at √sNN = 200 GeV. The presented results include transverse momentum spectra, rapidity distributions, nuclear modification factors (RCP), antibaryon-to-baryon ratio, and Ω-to-ϕ ratios. A significant Ω-to-ϕ enhancement is observed in central Au+Au collisions at √sNN≥7.7 GeV, with a similar trend in O+O and isobar (Zr+Zr, Ru+Ru) collisions at 200 GeV, where the enhancement grows from peripheral to central events. The results hint at a possible Ω-to-ϕ enhancement pattern that appears consistent at similar Npart values across different collision systems at √sNN = 200 GeV.

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Publication Details

Journal
Springer Link (Chiba Institute of Technology)
Published
2026-04-17
DOI
https://doi.org/10.1051/epjconf/202636411007/pdf
Primary Topic
High-Energy Particle Collisions Research
Type
article
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article

Strangeness production in different collision systems and at different collision energies with the STAR experiment

Weiguang Yuan
Springer Link (Chiba Institute of Technology)
High-Energy Particle Collisions Research
article

Strangeness production in different collision systems and at different collision energies with the STAR experiment

Weiguang Yuan
article en

Abstract

Strangeness production has been suggested as a sensitive probe to the early dynamics of the deconfined matter created in heavy-ion collisions. In these proceedings, we report new measurements of strange hadron (Ks0, Λ, Λ̅, Ξ, Ξ̅, ϕ, Ω, Ω̅) production in Au+Au collisions at √sNN = 7.7, 9.2, 11.5, 14.6, 19.6 GeV and in O+O, Zr+Zr and Ru+Ru collisions at √sNN = 200 GeV. The presented results include transverse momentum spectra, rapidity distributions, nuclear modification factors (RCP), antibaryon-to-baryon ratio, and Ω-to-ϕ ratios. A significant Ω-to-ϕ enhancement is observed in central Au+Au collisions at √sNN≥7.7 GeV, with a similar trend in O+O and isobar (Zr+Zr, Ru+Ru) collisions at 200 GeV, where the enhancement grows from peripheral to central events. The results hint at a possible Ω-to-ϕ enhancement pattern that appears consistent at similar Npart values across different collision systems at √sNN = 200 GeV.

Springer Link (Chiba Institute of Technology)
Openalex Percentile: Top 11%
High-Energy Particle Collisions Research
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