Fig. 3.

Templates for the $R_{3/2}$ distribution for $t\overline{t}$ MC simulation using top-quark mass values of $170.0,175.0$ and $180.0\mathrm{GeV}$, respectively. For each top-quark mass, the $R_{3/2}$ distribution is fitted by the sum (black solid) of a Gaussian (red dashed) and Landau (blue dotted) function. Superimposed (orange cross-hatched) are the templates obtained from a combined fit of all $R_{3/2}$ distributions using a linear dependence of parameters of the Gaussian and Landau functions on the top-quark mass value. The insets under the distributions show the difference Fit$-$MC between the combined fit and the simulated $R_{3/2}$ histogram normalised to the statistical uncertainty $\mathit{\sigma }$ of the corresponding $R_{3/2}$ bin