Fig. 9.

Distributions of the activation value of the ANN output node with the highest activation value for events selected in the $3\ell +0{\mathrm{\tau }}_{\mathrm{h}}$ channel and classified as $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ signal (upper left), $\mathrm{t}\mathrm{H}$ signal (upper right), and background (lower left), and for events selected in the $2\ell \mathrm{SS}+1{\mathrm{\tau }}_{\mathrm{h}}$ channel (lower right). In case of the $2\ell \mathrm{SS}+1{\mathrm{\tau }}_{\mathrm{h}}$ channel, the activation value of the ANN output nodes for $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ signal, $\mathrm{t}\mathrm{H}$ signal, and background are shown together in a single histogram, concatenating histogram bins as appropriate and enumerating the bins by a monotonously increasing number. The distributions expected for the $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ and $\mathrm{t}\mathrm{H}$ signals and for background processes are shown for the values of the parameters of interest and of the nuisance parameters obtained from the ML fit. The best fit value of the $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ and $\mathrm{t}\mathrm{H}$ production rates amounts to ${\widehat{\mu }}_{\mathrm{t}\overline{\mathrm{t}}\mathrm{H}}=0.92$ and ${\widehat{\mu }}_{\mathrm{t}\mathrm{H}}=5.7$ times the rates expected in the SM