Table 3.

Summary of the distributions entering the likelihood fit for each channel of each search, both in the signal region (SR) and the various control regions (CR) used to constrain the background. Each entry represents one distribution; some channels have several distributions for different lepton flavours. MV1c cat. refers to the MV1c $b$-tagging event category. The distributions are unbinned for the $\ell \ell \ell \ell$ search and binned elsewhere. The VBF channels of the $\ell \ell \mathit{\nu }\mathit{\nu }$ search use only the overall event counts. See the text for the definitions of the specific variables used as well as for the definitions of the signal and control regions

Search	Channel		SR	$Z$ CR	$W$ CR	Top CR
$\ell \ell \ell \ell$	ggF		$m_{eeee}$, $m_{\mathit{\mu }\mathit{\mu }\mathit{\mu }\mathit{\mu }}$, $m_{ee\mathit{\mu }\mathit{\mu }}$, $m_{\mathit{\mu }\mathit{\mu }ee}$
	VBF		$m_{\ell \ell \ell \ell }$
	VH		$m_{\ell \ell \ell \ell }$
$\ell \ell \mathit{\nu }\mathit{\nu }$	ggF		$m_{\text{T}}^{ee}$, $m_{\text{T}}^{\mathit{\mu }\mathit{\mu }}$
	VBF		$N_{\mathrm{evt}}^{ee}$, $N_{\mathrm{evt}}^{\mathit{\mu }\mathit{\mu }}$
$\ell \ell qq$	ggF	Untagged	$m_{\ell \ell jj}$	MV1c cat.
		Tagged	$m_{\ell \ell jj}$	MV1c cat.		$m_{\ell \ell jj}$
		Merged-jet	$m_{\ell \ell j}$	$m_{\ell \ell j}$
	VBF		$m_{\ell \ell jj}$	$m_{\ell \ell jj}$
$\mathit{\nu }\mathit{\nu }qq$	ggF	Untagged	$m_{\text{T}}$		MV1c cat. (0 $b$-tags)
		Tagged	$m_{\text{T}}$		MV1c cat. (1 $b$-tag)