"Figure 8a-1" of "Deviation from quark-number scaling of the anisotropy parameter v_2 of pions, kaons, and protons in Au+Au collisions at sqrt(s_NN) = 200 GeV"

Identified hadron $v_2$ in central (0–20% centrality, left panels) Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Panels (a) and (b) show $v_2$ as a function of transverse momentum $p_T$. The $v_2$ of all species for centrality 0–20% has been scaled up by a factor of 1.6 for better comparison with results of 20–60% centrality. The error bars (shaded boxes) represent the statistical (systematic) uncertainties. The systematic uncertainties shown are type A and B only.

√s_NN=200 GeV的金-金（Au+Au）中心碰撞（0–20%对心度，左面板）中的已鉴别强子椭圆流系数v₂。图(a)与图(b)展示了v₂随横向动量p_T的变化关系。为便于与20–60%对心度区间的实验结果进行对比，已将0–20%对心度区间内所有粒子种类的v₂数值放大1.6倍。误差棒（阴影箱型）分别代表统计（系统）误差。本次展示的系统误差仅包含A类与B类系统误差。