"Figure 11 right" of "Search for long-lived particles decaying to a pair of muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Comparison of the number of events observed in 2018 data in the STA-TMS dimuon category with the expected number of background events, in representative $m_{\mu \mu}$ intervals. The black points with crosses show the number of observed events; the green and yellow components of the stacked histograms represent the estimated numbers of DY and QCD events, respectively. The last bin includes events in the overflow. The uncertainties in the total expected background (shaded area) are statistical only. Signal contributions expected from simulated $H \rightarrow Z_D Z_D$ with $m_{Z_D}$ of 30 and 60 GeV are shown in red and blue, respectively. Their yields are set to the corresponding combined median expected exclusion limits at 95% CL, scaled up as indicated in the legend to improve visibility. The legends also include the total number of observed events as well as the number of expected background events obtained inclusively, by applying the background evaluation method to the events in all $m_{\mu \mu}$ intervals combined.

2018年STA-TMS双μ子类别数据中观测事件数与代表性μμ质量（m_μμ）区间内预期背景事件数的比较。带误差线的黑点表示观测事件数；堆叠直方图的绿色和黄色部分分别代表Drell-Yan（DY）与量子色动力学（QCD）事件的估计数量。最后一个bin包含溢出事件。总预期背景的不确定性（阴影区域）仅为统计性。模拟的H→Z_D Z_D过程（Z_D玻色子质量m_Z_D为30 GeV与60 GeV）的预期信号贡献分别以红色和蓝色显示，其产额设定为95%置信水平下对应的联合中位预期排除限，并按图例所示比例放大以提升可见度。图例还包含观测事件总数及对所有μμ质量区间合并事件应用背景评估方法得到的预期背景事件数。