Table 3.

Overview of all signal, control and validation regions used in the off-Z analysis. For SR-loose, events with two jets (at least three jets) are required to satisfy $E_{\mathrm{T}}^{\mathrm{miss}}$ $>$ 150 (100) $\mathrm{GeV}$. Further details are the same as in Table 2

Off-Z region	$E_{\mathrm{T}}^{\mathrm{miss}}$ ($\mathrm{GeV}$)	$n_{\mathrm{jets}}$	$n_{\mathrm{b}-\mathrm{jets}}$	$m_{\ell \ell }$ ($\mathrm{GeV}$)	SF/DF
Signal regions
SR-2j-bveto	$>$200	$\ge$2	= 0	$m_{\ell \ell }\notin [80,110]$	SF
SR-2j-btag	$>$200	$\ge$2	$\ge$1	$m_{\ell \ell }\notin [80,110]$	SF
SR-4j-bveto	$>$200	$\ge$4	= 0	$m_{\ell \ell }\notin [80,110]$	SF
SR-4j-btag	$>$200	$\ge$4	$\ge$1	$m_{\ell \ell }\notin [80,110]$	SF
SR-loose	$>$(150, 100)	$(2,\ge 3)$	–	$m_{\ell \ell }\notin [80,110]$	SF
Control regions
CRZ-2j-bveto	$>$200	$\ge$2	= 0	$80<m_{\ell \ell }<110$	SF
CRZ-2j-btag	$>$200	$\ge$2	$\ge$1	$80<m_{\ell \ell }<110$	SF
CRZ-4j-bveto	$>$200	$\ge$4	= 0	$80<m_{\ell \ell }<110$	SF
CRZ-4j-btag	$>$200	$\ge$4	$\ge$1	$80<m_{\ell \ell }<110$	SF
CRZ-loose	$>$(150, 100)	$(2,\ge 3)$	–	$80<m_{\ell \ell }<110$	SF
CRT-2j-bveto	$>$200	$\ge$2	= 0	$m_{\ell \ell }\notin [80,110]$	DF
CRT-2j-btag	$>$200	$\ge$2	$\ge$1	$m_{\ell \ell }\notin [80,110]$	DF
CRT-4j-bveto	$>$200	$\ge$4	= 0	$m_{\ell \ell }\notin [80,110]$	DF
CRT-4j-btag	$>$200	$\ge$4	$\ge$1	$m_{\ell \ell }\notin [80,110]$	DF
CRT-loose	$>$(150, 100)	$(2,\ge 3)$	–	$m_{\ell \ell }\notin [80,110]$	DF
Validation regions
VR-offZ	100–150	= 2	–	$m_{\ell \ell }\notin [80,110]$	SF