Fig. 9.

The observed and expected dilepton mass distributions in the off-Z SR-loose (top), SR-2j-bveto (middle), and SR-4j-bveto (bottom). The vertical dashed lines indicate the $80<m_{\ell \ell }<110$ $\mathrm{GeV}$ region, which is used to normalise the $Z+\text{jets}$ background and is thus not treated as a search region. Example signal models (dashed lines) are overlaid, with $m(\tilde{q})/m(\tilde{g})$, $m({\tilde{\mathit{\chi }}}_2^0)/m({\tilde{\mathit{\chi }}}_1^{\pm })$, $m(\tilde{\ell })/m(\tilde{\mathit{\nu }})$, and $m({\tilde{\mathit{\chi }}}_1^0)$ of each benchmark point being indicated in the figure legend. The last bin contains the overflow. All uncertainties are included in the hatched uncertainty band