"Table 302" 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。本文报道了相对论重离子对撞机（Relativistic Heavy Ion Collider, RHIC）束流能量扫描项目中，STAR实验在质心系能量√sNN=7.7~62.4 GeV的金-金（Au+Au）碰撞中，快度区鉴别的粒子的椭圆流（Elliptic flow, $v_2$）值，按三种中心度类别进行了展示。三种中心度的中心度依赖特性，以及√sNN=14.5 GeV处的实验数据均为首次公开的新成果。除最低束流能量工况外，所有中心度类别均呈现出相似的$v_2$重子-介子相对分裂特性，该结果与组分夸克数标度（number-of-constituent quark scaling）的偏差处于15%的范围内。多数粒子的$v_2$值高于其反粒子的现象（此前已在最小偏置碰撞中被观测到）表现出明确的中心度依赖关系，在最中心的碰撞中该差值最为显著。此外，本研究将实验结果与多相输运模型（Multiphase Transport Model）进行了比对，并采用爆轰波（Blast Wave）模型完成了拟合。