"Figure 17a" of "Search for new particles decaying into top quark-antiquark pairs in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Expected and observed upper limits at 95% CL on the coupling strength modifier for a scalar (H) heavy Higgs boson with a relative width of 2.5%. The solid gray shaded area denotes the parameter space excluded by this search. The gray hatched area indicates the unphysical parameter space where the partial width $\Gamma_{\Phi t\bar{t}}$ exceeds the total width $\Gamma_{\Phi}$.

针对相对宽度为2.5%的标量（H）型重希格斯玻色子，其耦合强度修正因子（coupling strength modifier）的95%置信度（confidence level, CL）预期上限与观测上限。其中，实心灰色阴影区域代表本次搜索所排除的参数空间；灰色斜线填充区域则表示非物理参数空间，该空间内的部分衰变宽度$Gamma_{Phi tar{t}}$ 超过总衰变宽度$Gamma_{Phi}$。