"Figure 8, BKWD" of "Measurement of $\psi(2S)$ nuclear modification at backward and forward rapidity in $p$ $+$ $p$, $p$ $+$ Al, and $p$ $+$ Au collisions at $\sqrt{s_{_{NN}}}=200$ GeV"

Invariant yield ratio of PSI(2S)-->MU+MU- with respect to J/PSI(1S)-->MU+MU- in p+Au collisions as a function of centrality at backward rapidity. The statistical and systematic uncertainties vary point-to-point and are listed for each measured value. The global systematic uncertainty cancels when taking the ratio.

本数据集包含质子-金核（p+Au）碰撞中，后向快度（backward rapidity）区间内以碰撞中心度（centrality）为自变量的PSI(2S)→μ⁺+μ⁻相对于J/PSI(1S)→μ⁺+μ⁻的不变产额比（invariant yield ratio）。各测量点的统计不确定性（statistical uncertainty）与系统不确定性（systematic uncertainty）逐点各不相同，且已随对应测量值同步列出。在计算该比值时，整体系统不确定性（global systematic uncertainty）将相互抵消。