"Table 372" 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.

BNL-RHIC数据集：本文呈现了在相对论重离子对撞机束流能量扫描计划中，由STAR实验于核子-核子质心系能量√s_{NN}=7.7~62.4 GeV的金-金（Au+Au）碰撞中间快度区域，针对三种中心度区间测量得到的已鉴别粒子的椭圆流（elliptic flow，$v_2$）数值；其中关于中心度的依赖关系以及√s_{NN}=14.5 GeV下的实验数据为首次公开的新结果。除最低束流能量外，我们在所有中心度区间均观测到相似的相对椭圆流$v_2$重子-介子分裂效应，该结果与组分夸克数标度律（number-of-constituent quark scaling）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的椭圆流$v_2$数值大于对应反粒子的现象，其展现出显著的中心度依赖特征，在最中心的碰撞区间中粒子与反粒子的椭圆流差值最大。本研究同时将实验结果与多相输运模型（Multiphase Transport Model）进行了对比，并利用爆炸波模型（Blast Wave model）对数据进行了拟合。