Strangeness in STAR at RHIC

Abstract

We present the recent results of strangeness production at the mid-rapidity in Au + Au collisions at RHIC, from $\sqrt{s_{\mathrm{NN}}}$ = 7.7 to 200 GeV. The $v_2$ of multi-strange baryon $\Omega$ and $\varphi$ mesons are similar to that of pions and protons in the intermediate $p_T$ range (2 - 5 GeV/$c$) in $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV Au + Au collisions, indicating that the major part of collective flow has been built up at partonic stage. The breaking of mass ordering between $\varphi$ mesons and protons in the low $p_T$ range ($<$ 1 GeV/$c$) is consistent with a picture that $\varphi$ mesons are less sensitive to later hadronic interaction. The nuclear modification factor $R_{\mathrm{CP}}$ and baryon to meson ratio change dramatically when the collision energy is lower than 19.6 GeV. It suggests a possible change of medium property of the system compared to those from high energies.

arXiv comment7 pages, 6 figures, SQM 2016 proceedings

References in corpus (8)

• Evidence of early multi-strange hadron freeze-out in high energy nuclear collisions
• Inclusive charged hadron elliptic flow in Au + Au collisions at $\sqrt{s_{NN}}$ = 7.7 - 39 GeV
• Elliptic flow of identified hadrons in Au+Au collisions at $\sqrt{s_{NN}}=$ 7.7--62.4 GeV
• Inclusive Distributions for Hadronic Collisions in the Valon-Recombination Model
• Centrality dependence of identified particle elliptic flow in relativistic heavy ion collisions at sqrt(s)= 7.7--62.4 GeV
• Centrality and transverse momentum dependence of elliptic flow of multi-strange hadrons and $\varphi$ meson in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Probing Parton Dynamics of QCD Matter with $\Omega$ and $\varphi$ Production
• Production of strange particles at intermediate pT at RHIC

Cited by in corpus (2)

• Identified charged-hadron production in $p$$+$Al, ${}^3$He$+$Au, and Cu$+$Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV and in U$+$U collisions at $\sqrt{s_{{}_{NN}}}=193$ GeV
• Comment on "Evaluation of kinetic freeze-out properties in different relativistic heavy-ion collision systems at \sqrtsNN = 200 GeV'' (Eur. Phys. J. Plus (2025) 140:179) https://doi.org/10.1140/epjp/s13360-025-06119-0