"Figure 11c" of "Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Postfit distributions in $m_{t\bar{t}}$ in the single-lepton channel for data and simulation in the second bin of cos(theta*) in the t\bar{t} signal region, for the resolved category, 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 $\sigma^2 = \sigma_{\mathrm{data}}^2 - \sigma_{\mathrm{fit}}^2$.

本数据集展示了仅背景假设下，分辨喷注范畴内，顶夸克-反顶夸克对（$tar{t}$）信号区域中$cos( heta^*)$的第二个分箱内，单轻子道的数据与模拟的顶夸克-反顶夸克对不变质量拟合后分布。其中，相对宽度为1%、质量为2太电子伏特（TeV）的Z'玻色子（Z' boson）信号被归一化至1皮靶恩（pb）的截面。下方面板展示了拉拽量（pulls），其定义为$( ext{数据}- ext{预测值})/sigma$，其中$sigma$代表每个分箱相对于标准模型（Standard Model, SM）预测值的总拟合后不确定度，$sigma$的数学定义为$sigma^2 = sigma_{mathrm{data}}^2 - sigma_{mathrm{fit}}^2$。