Table 3.

Event yields expected after fits to background and signal processes in methods A or B, using the initial selections (summarised in Table 1), and requiring $S/B>10\%$. The yields are compared to the data observed in the different channels and categories. The total uncertainties quoted for signal, $\mathrm{DY}\mathrm{Z}\mathrm{jj}$, dibosons (VV), and processes with top quarks ($\mathrm{t}\overline{\mathrm{t}}$ and single top quarks) are dominated by JES uncertainties and include other sources, e.g., the statistical fluctuations in the MC samples

Selection	Channel	VV	Top quark	$\mathrm{DY}\mathrm{Z}\mathrm{jj}$	Total backgrounds	$\mathrm{EW}\mathrm{Z}\mathrm{jj}$	Data
Initial	$\mathrm{e}\mathrm{e}$ (A)	$255\pm 14$	$314\pm 15$	$20,083\pm 857$	$20,652\pm 857$	$659\pm 16$	20,752
	$\mathit{\mu }\mathit{\mu }$ (A)	$355\pm 15$	$456\pm 16$	$30,042\pm 1,230$	$30,853\pm 1,230$	$925\pm 22$	30,306
	$\mathit{\mu }\mathit{\mu }$ (B)	$226\pm 13$	$295\pm 12$	$25,505\pm 1,735$	$26,026\pm 1,735$	$833\pm 14$	26,651
BDT$>$0.05	$\mathrm{e}\mathrm{e}$ (A)	$56\pm 6$	$50\pm 7$	$3,541\pm 169$	$3,647\pm 169$	$427\pm 12$	3,979
BDT$>$0.05	$\mathit{\mu }\mathit{\mu }$ (A)	$38\pm 5$	$36\pm 5$	$2,867\pm 135$	$2,941\pm 135$	$459\pm 14$	3,182
BDT$>$0.1	$\mathit{\mu }\mathit{\mu }$ (B)	$36\pm 3$	$35\pm 3$	$3,871\pm 273$	$3,942\pm 273$	$514\pm 12$	4,312