Spectra and elliptic flow of (multi-)strange hadrons at RHIC and LHC within viscous hydrodynamics+hadron cascade hybrid model

2016/07/14 by Xiangrong Zhu, Zhu, Xiangrong
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1607.04003

Abstract

Using the (2+1)-dimensional ultrarelativistic viscous hydrodynamics+hadron cascade, VISHNU, hybrid model, we study the p_{\rm T}-spectra and elliptic flow of Λ, Ξ, and Ω in Au+Au collisions at √s_NN=200 GeV and in Pb+Pb collisions at √s_NN=2.76 TeV. Comparing our model results with the data measurements, we find that the VISHNU model gives general descriptions of the measurements of these strange and multi-strange hadrons at several centrality classes at RHIC and LHC. Mass ordering of elliptic flow v₂ among π, K, p, Λ, Ξ, and Ω are further investigated and discussed at the two collision systems. We find, at both RHIC and LHC, the v₂ mass ordering among π, K, p, and Ω are fairly reproduced within the VISHNU hybrid model, and more improvements are needed to implement for well describing the v₂ mass ordering among p, Λ, and Ξ.

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