Centrality dependence of elliptic flow of multi-strange hadrons in Au+Au collisions at √sNN = 200 GeV

15th 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;    Center-of-mass energies;    Elliptic flows;    Hadronic interactions;    Heavy ion collision;    Mid-rapidity;    Phi meson;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/668/1/012079/pdf
DOI  :  10.1088/1742-6596/668/1/012079

来源: IOP

【 摘 要 】

We present recent results of the mid-rapidity elliptic flow (ν2) for multi-strange hadrons and the φ meson as a function of centrality in Au + Au collisions at the center of mass energy √sNN = 200 GeV. The transverse momentum dependence of φ and Ω ν2is similar to that of pion and proton, indicating that the heavier strange (s) quark flows as strongly as the lighter up (u) and down (d) quarks. These observations constitute a clear piece of evidence for the development of partonic collectivity in heavy-ion collisions at the top RHIC energy. In addition, the mass ordering of ν2breaks between the φ and proton at low transverse momenta in the 0-30% centrality bin, possibly due to the effect of late hadronic interactions on the proton ν2.