Fig. 8.

Background-subtracted distributions of the JP discriminant in the dielectron (left) and dimuon (right) channels for $\mathrm{Z}+\text{jets}$ events with a ${\mathrm{D}}^{\pm }\to {\mathrm{K}}^{\mp }{\pi }^{\pm }{\pi }^{\pm }$ candidate. The shape of the $\mathrm{Z}+\mathrm{c}$ and $\mathrm{Z}+\mathrm{b}$ contributions is estimated as explained in the text. Their normalization is adjusted to the result of the signal extraction fit. Vertical bars on data points represent the statistical uncertainty in the data. The hatched areas represent the sum in quadrature of the statistical uncertainties of the templates describing the two contributions ($\mathrm{Z}+\mathrm{c}$ from $\mathrm{W}+\mathrm{c}$ data events and $\mathrm{Z}+\mathrm{b}$ from simulation)