Table 9.

Results in the off-Z search region SR-4j-bveto, in the below-Z range ($20<m_{\ell \ell }<80$ $\mathrm{GeV}$, top) and above-Z range ($m_{\ell \ell }>110$ $\mathrm{GeV}$, bottom). Details are the same as in Table 8

	SR-4j-bveto ee	SR-4j-bveto $\mathit{\mu }\mathit{\mu }$	SR-4j-bveto same-flavour combined
Below-Z ($20<m_{\ell \ell }<80$ $\mathrm{GeV}$)
Observed events	1	5	6
Expected background events	$4.7\pm 1.6\pm 1.1$	$3.6\pm 1.5\pm 1.0$	$8.2\pm 3.1\pm 1.4$
Flavour-symmetric backgrounds	$4.1\pm 1.6\pm 1.1$	$3.5\pm 1.5\pm 1.0$	$7.7\pm 3.1\pm 1.3$
$Z/{\mathit{\gamma }}^{\ast }+\text{jets}$	$0.4\pm 0.2\pm 0.3$	$0.0\pm 0.0\pm 0.4$	$0.4\pm 0.2\pm 0.5$
Rare top	$<$0.1	$<$0.1	$<$0.1
WZ / ZZ diboson	$<$0.1	$<$0.1	$<$0.1
Fake leptons	$0.2\pm 0.3\pm 0.0$	$<$0.1	$0.1\pm 0.3\pm 0.0$
Above-Z ($m_{\ell \ell }>110$ $\mathrm{GeV}$)
Observed events	2	9	11
Expected background events	$5.7\pm 1.6\pm 1.2$	$4.5\pm 1.3\pm 1.7$	$10\pm 3\pm 2$
Flavour-symmetric backgrounds	$5.5\pm 1.6\pm 1.2$	$4.3\pm 1.3\pm 1.0$	$9.8\pm 2.9\pm 1.4$
$Z/{\mathit{\gamma }}^{\ast }+\text{jets}$	$0.2\pm 0.1\pm 0.1$	$0.0\pm 0.0\pm 1.3$	$0.2\pm 0.1\pm 1.3$
Rare top	$<$0.1	$<$0.1	$<$0.1
WZ / ZZ diboson	$<$0.1	$0.2\pm 0.1\pm 0.0$	$0.2\pm 0.1\pm 0.0$
Fake leptons	$<$0.2	$<$0.1	$<$0.2