"Table 159" of "Centrality dependence of identified particles in relativistic heavy ion collisions at sqrt(s)= 7.7-62.4 GeV"

BNL-RHIC. Elliptic flow ($v_{2}$) values for identified particles at midrapidity in Au + Au collisions measured by the STAR experiment in the Beam Energy Scan at the Relativistic Heavy Ion Collider at $\sqrt{s_{NN}}$ = 7.7-62.4 GeV are presented for three centrality classes. The centrality dependence and the data at $\sqrt{s_{NN}}$ = 14.5 GeV are new. Except at the lowest beam energies we observe a similar relative $v_{2}$ baryon-meson splitting for all centrality classes which is in agreement within 15% with the number-of-constituent quark scaling. The larger $v_{2}$ for most particles relative to antiparticles, already observed for minimum bias collisions, shows a clear centrality dependence, with the largest difference for the most central collisions. Also, the results are compared with A Multiphase Transport Model and fit with a Blast Wave model.本数据集收录了BNL-RHIC项目下，相对论重离子对撞机（Relativistic Heavy Ion Collider, RHIC）束流能量扫描（Beam Energy Scan）实验中，STAR实验合作组在√s_NN=7.7~62.4 GeV的金-金（Au+Au）碰撞快度中心区（midrapidity），已鉴别粒子的椭圆流（elliptic flow, v₂）数值，共涵盖三类中心度类别（centrality classes）。其中，中心度依赖关系以及√s_NN=14.5 GeV处的实验数据为首次公布的新结果。除最低束流能量外，我们在所有中心度类别中均观测到一致的重子-介子相对v₂分裂现象，该结果与组分夸克数标度（number-of-constituent quark scaling）的偏差在15%以内。此前在最小偏置碰撞（minimum bias collisions）中已观测到的多数粒子v₂大于对应反粒子的现象，呈现出显著的中心度依赖特征，在最中心的碰撞事件中差异最为显著。此外，本结果与多相输运模型（Multiphase Transport Model）进行了对比，并采用爆炸波模型（Blast Wave model）完成拟合。