"Figure 14e" of "Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Postfit distributions in S_T for data and simulation for the resolved category for the $ee$ channel, under the background-only hypothesis. The Z' boson signal with a relative width of 1% and a mass of 2 TeV is normalized to a cross section of 1 pb. The lower panels show the pulls, defined as $(\text{Data}-\text{Prediction})/\sigma$, where $\sigma$ denotes the total postfit uncertainty in each bin, relative to the SM prediction, defined as $\sigma^2 = \sigma_{\mathrm{data}}^2 - \sigma_{\mathrm{fit}}^2$.

在仅背景假设下，针对ee道的分辨事例类别，数据与模拟的S_T拟合后分布。Z'玻色子信号的相对宽度为1%，质量为2 TeV，其截面被归一化至1 pb。下方面板展示了拉拽量（pull）分布，其定义为$( ext{数据}- ext{预测})/sigma$，其中$sigma$代表每个分箱相对于标准模型（Standard Model，SM）预测的总拟合后不确定度，$sigma$的定义为$sigma^2 = sigma_{mathrm{data}}^2 - sigma_{mathrm{fit}}^2$。