Table 6.

Number of events selected in the $3\ell$- and $4\ell$-CRs and in the CR for the $\mathrm{t}\overline{\mathrm{t}}\mathrm{W}(\mathrm{W})$ background, compared to the event yields expected from different types of background and from the $\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$ and $\mathrm{t}\mathrm{H}$ signals, after the fit to data is performed as described in Sect. 9. Uncertainties shown include all systematic components. The symbol “–” indicates that the corresponding background does not apply

Process	$3\ell$-CR	$4\ell$-CR	$\mathrm{t}\overline{\mathrm{t}}\mathrm{W}(\mathrm{W})$ CR
$\mathrm{t}\overline{\mathrm{t}}\mathrm{H}$	$15.9\pm 4.4$	$1.4\pm 0.4$	$62\pm 14$
$\mathrm{t}\mathrm{H}$	$4.4\pm 3.0$	–	$22\pm 18$
$\mathrm{t}\overline{\mathrm{t}}\mathrm{Z}+\mathrm{t}\overline{\mathrm{t}}\mathrm{\gamma }{}^{\ast }$	$550\pm 43$	$41.5\pm 3.0$	$100.3\pm 8.1$
$\mathrm{t}\overline{\mathrm{t}}\mathrm{W}+\mathrm{t}\overline{\mathrm{t}}\mathrm{W}\mathrm{W}$	$26.8\pm 1.7$	–	$588\pm 35$
$\mathrm{W}\mathrm{Z}$	$4320\pm 120$	–	$51.6\pm 7.5$
$\mathrm{Z}\mathrm{Z}$	$298\pm 18$	$1030\pm 32$	$0.2\pm 0.1$
Nonprompt leptons	$210\pm 20$	–	$102\pm 14$
Flips	–	–	$24.9\pm 4.0$
Rare backgrounds	$311\pm 61$	$17.0\pm 3.4$	$58\pm 13$
Conversions	$1.0\pm 0.3$	$0.1\pm 0.1$	$1.4\pm 0.6$
$\mathrm{g}\mathrm{g}\mathrm{H}+\mathrm{q}\mathrm{q}\mathrm{H}+\mathrm{V}\mathrm{H}+\mathrm{t}\overline{\mathrm{t}}\mathrm{V}\mathrm{H}$	$42.8\pm 3.1$	$5.8\pm 0.4$	$1.6\pm 0.3$
Total expected background	$5761\pm 99$	$1094\pm 33$	$949\pm 33$
Data	5778	1089	986