Study the QCD phase structure with vn in heavy ion collisions at RHIC-STAR

by Prof. Shusu Shi (Central China Normal University)

Wednesday 8 Jan 2020, 16:00 → 17:00 Asia/Shanghai

B105 (CHEP)

The thermalized QCD matter formed in high energy heavy-ion collisions is tilted in the reaction plane as a function of rapidity. Hydrodynamic models suggest that the double sign change of v1 slope (dv1/dy) at midrapidity for net baryon as a function of beam energy is a signature of the first-order phase transition. The (multi-)strange hadrons might be more sensitive to the early EoS because of their smaller hadronic interaction cross section. Due to the different sensitivity of strange particles to hadronic phases, the mass ordering of elliptic flow (v2) is expected to be violated between proton and φ meson in the low-pT range (pT < 1.5 GeV/c). In this talk, we will present the vn measurements of identified hadrons from top energy heavy ion collisions to Beam Energy Scan at RHIC. These results will be compared to model calculations and the physics implications will be discussed.