Table 3.

Expected signal, background and total yields, including their total uncertainties, and observed events in data, in the 115 GeV $<m_{4\ell }<$ 130 GeV signal region. The number of expected signal events is given for a SM Higgs boson mass of 125.5 GeV

	SM Signal	$Z{Z}^{\ast }$	$t\overline{t},Z+\mathrm{jets}$	Total expected	Observed
$\sqrt{s}=7$ $\text{TeV}$
$4\mathit{\mu }$	1.02 $\pm$ 0.10	0.65 $\pm$ 0.03	0.14 $\pm$ 0.06	1.81 $\pm$ 0.12	3
$2\mathit{\mu }2e$	0.47 $\pm$ 0.05	0.29 $\pm$ 0.02	0.53 $\pm$ 0.12	1.29 $\pm$ 0.13	1
$2e2\mathit{\mu }$	0.64 $\pm$ 0.06	0.45 $\pm$ 0.02	0.13 $\pm$ 0.05	1.22 $\pm$ 0.08	2
4e	0.45 $\pm$ 0.04	0.26 $\pm$ 0.02	0.59 $\pm$ 0.12	1.30 $\pm$ 0.13	2
Total	2.58 $\pm$ 0.25	1.65 $\pm$ 0.09	1.39 $\pm$ 0.26	5.62 $\pm$ 0.37	8
$\sqrt{s}=8$ $\text{TeV}$
$4\mathit{\mu }$	5.81 $\pm$ 0.58	3.36 $\pm$ 0.17	0.97 $\pm$ 0.18	10.14 $\pm$ 0.63	13
$2\mathit{\mu }2e$	3.00 $\pm$ 0.30	1.59 $\pm$ 0.10	0.52 $\pm$ 0.12	5.11 $\pm$ 0.34	8
$2e2\mathit{\mu }$	3.72 $\pm$ 0.37	2.33 $\pm$ 0.11	0.84 $\pm$ 0.14	6.89 $\pm$ 0.41	9
4e	2.91 $\pm$ 0.29	1.44 $\pm$ 0.09	0.52 $\pm$ 0.11	4.87 $\pm$ 0.32	7
Total	15.4 $\pm$ 1.5	8.72 $\pm$ 0.47	2.85 $\pm$ 0.39	27.0 $\pm$ 1.6	37