"Experimental covariance matrix" of "Probing small Bjorken-$x$ nuclear gluonic structure via coherent J/$\psi$ photoproduction in ultraperipheral PbPb collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 TeV"

The experimental covariance matrix of the total coherent photoproduction cross section as a function of photon-nuclear center-of-mass energy per nucleon $W_{\gamma \mathrm{N}}^{\mathrm{Pb}}$. The bins are ordered as increasing in $W_{\gamma \mathrm{N}}^{\mathrm{Pb}}$.

本数据集为以每个核子的光子-铅核质心系能量$W_{gamma mathrm{N}}^{mathrm{Pb}}$为自变量的总相干光致产生截面（total coherent photoproduction cross section）的实验协方差矩阵，所有数据分箱均按照$W_{gamma mathrm{N}}^{mathrm{Pb}}$的取值递增顺序排列。