"Figure 3 (left)" of "Search for a new heavy resonance decaying to a top quark and a neutral scalar boson in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Upper limits at 95% CL on the product of the cross section and branching fraction for $\mathrm{pp}\to\mathrm{T}^\prime\to\mathrm{tH}$ as functions of the $\mathrm{T}^\prime$ quark mass for fixed $\mathit{m}_{\phi} = \mathit{m}_{\mathrm{H}} = 125$ GeV. Here, the solid blue (brown) curves indicate the theoretical cross sections for the singlet $\mathrm{T}^\prime$ quark model assuming its width is 1% (5%) of its mass. Upper limits for $\mathrm{T}^\prime$ quark masses below 1 TeV are obtained from the fully hadronic channel only, while limits for all other mass points are obtained from the combination of the semileptonic and fully hadronic channels.