"Table 96" 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.

本数据集收录了布鲁克海文国家实验室（Brookhaven National Laboratory, BNL）相对论重离子对撞机（Relativistic Heavy Ion Collider, RHIC）上STAR实验在束流能量扫描项目中，于核子-核子质心系能量√s_{NN}=7.7~62.4 GeV的金-金碰撞快度中段区，针对三类中心度类别测得的鉴别粒子椭圆流（elliptic flow, v₂）数值。其中，中心度依赖关系以及√s_{NN}=14.5 GeV下的实验数据为首次公布的原创结果。除最低束流能量工况外，所有中心度类别均呈现出相似的重子-介子相对v₂分裂特征，该结果与组分夸克数标度的偏差在15%以内。此前在最小偏置碰撞中已观测到的多数粒子v₂大于其反粒子的现象，呈现出显著的中心度依赖特性，在最中心的碰撞事件中该差异达到最大。本研究同时将实验结果与多相输运模型进行了对比，并通过Blast Wave模型完成了拟合。