Strangeness in STAR experiment at RHIC

16th International Conference on Strangeness in Quark Matter

Shi, Shusu^1

Key Laboratory of Quarks and Lepton Physics (MOE), Institute of Particle Physics, Central China Normal University, Wuhan

430079, China^1

关键词: Au+Au collisions;    Collision energies;    Hadronic interactions;    Lower energies;    Mid-rapidity;    Nuclear modification factors;    STAR experiment;    Strangeness production;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/779/1/012008/pdf
DOI  :  10.1088/1742-6596/779/1/012008

来源: IOP

【 摘 要 】

We present the recent results of strangeness production at the mid-rapidity in Au + Au collisions at RHIC, from √sNN = 7.7 to 200 GeV. Elliptic asymmetry v2of multi-strange baryon Ω and φ mesons are similar to that of pions and protons in the intermediate pT range (2-5 GeV/c) in √sNN = 200 GeV Au + Au collisions, indicating that the major part of collective ow has been built up at partonic stage. The breaking of mass ordering between φ mesons and protons in the low pT range (CPand baryon to meson ratio change dramatically when the collision energy is lower than 19.6 GeV. It suggests a possible change of the created QCD medium properties at lower energies compared to those from high energies.