"Figure 17c" 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 10%. 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 $\Gamma_{\Phi}$.