Fig. 15.

Two-dimensional contours of the likelihood function $\mathcal{L}$, given by Eq. (3), as a function of the production rates of the $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ and $\mathrm{t}\mathrm{H}$ signals (${\mu }_{\mathrm{t}\overline{\mathrm{t}}\mathrm{H}}$ and ${\mu }_{\mathrm{t}\mathrm{H}}$) and of the $\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}$ and $\mathrm{t}\overline{\mathrm{t}}\mathrm{W}$ backgrounds (${\mu }_{\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}}$ and ${\mu }_{\mathrm{t}\overline{\mathrm{t}}\mathrm{W}}$). The two production rates that are not shown on either the x or the y axis are profiled such that the function $\mathcal{L}$ attains its minimum at each point in the x-y plane