The ratio between the observed data and the simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $p_T^{miss}$ after scaling the simulation to match the total yield in data.

Comparison between data and simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_t$ after scaling the simulation to match the total yield in data. The hatched region indicates the total shape uncertainty in the simulation.

The ratio between the observed data and the simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_t$ after scaling the simulation to match the total yield in data.

Comparison between data and simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_W$ after scaling the simulation to match the total yield in data. The hatched region indicates the total shape uncertainty in the simulation.

The ratio between the observed data and the simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_W$ after scaling the simulation to match the total yield in data.

Comparison between data and simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_{\text{res}}$ after scaling the simulation to match the total yield in data. The hatched region indicates the total shape uncertainty in the simulation.

The ratio between the observed data and the simulation in the high $\Delta$m portion of the $\ell+\text{jets}$ control region as a function of $N_{\text{res}}$ after scaling the simulation to match the total yield in data.

Observed event yields in data (black points) and predicted SM background (filled histograms) for the low $\Delta$m search bins 0--52. The signal models are denoted in the legend with the masses in GeV of the SUSY particles in parentheses: $(m_{\tilde{t}}, m_{\tilde{\chi}^0_1})$ or $(m_{\tilde{g}}, m_{\tilde{\chi}^0_1})$ for the T2 or T1 signal models, respectively. The hatched bands correspond to the total uncertainty in the background prediction. The (unstacked) distributions for two example signal models are also shown.

The ratio of the data to the total background prediction for the low $\Delta$m search bins 0--52. The hatched bands correspond to the total uncertainty in the background prediction.

Observed event yields in data (black points) and predicted SM background (filled histograms) for the high $\Delta$m search bins 53--104. The signal models are denoted in the legend with the masses in GeV of the SUSY particles in parentheses: $(m_{\tilde{t}}, m_{\tilde{\chi}^0_1})$ or $(m_{\tilde{g}}, m_{\tilde{\chi}^0_1})$ for the T2 or T1 signal models, respectively. The hatched bands correspond to the total uncertainty in the background prediction. The (unstacked) distributions for two example signal models are also shown.

The ratio of the data to the total background prediction for the high $\Delta$m search bins 53--104. The hatched bands correspond to the total uncertainty in the background prediction.

Observed event yields in data (black points) and predicted SM background (filled histograms) for the high $\Delta$m search bins 105--152 with ${N_b = 2}$. The signal models are denoted in the legend with the masses in GeV of the SUSY particles in parentheses: $(m_{\tilde{t}}, m_{\tilde{\chi}^0_1})$ or $(m_{\tilde{g}}, m_{\tilde{\chi}^0_1})$ for the T2 or T1 signal models, respectively. The hatched bands correspond to the total uncertainty in the background prediction. The (unstacked) distributions for two example signal models are also shown.

The ratio of the data to the total background prediction for the high $\Delta$m search bins 105--152 with ${N_b = 2}$. The hatched bands correspond to the total uncertainty in the background prediction.

Observed event yields in data (black points) and predicted SM background (filled histograms) for the high $\Delta$m search bins 153--182 with ${N_b \geq 3}$. The signal models are denoted in the legend with the masses in GeV of the SUSY particles in parentheses: $(m_{\tilde{t}}, m_{\tilde{\chi}^0_1})$ or $(m_{\tilde{g}}, m_{\tilde{\chi}^0_1})$ for the T2 or T1 signal models, respectively. The hatched bands correspond to the total uncertainty in the background prediction. The (unstacked) distributions for two example signal models are also shown.

The ratio of the data to the total background prediction for the high $\Delta$m search bins 153--182 with ${N_b \geq 3}$. The hatched bands correspond to the total uncertainty in the background prediction.

The observed 95% CL upper limit on the production cross section of the T2tt simplified model as a function of the top squark and LSP masses. No interpretation is provided for signal models for which ${|{m_{\tilde{t}} - m_{\tilde{\chi}^0_1} - m_t}| < 25 GeV}$ and ${m_{\tilde{t}} < 275 GeV}$ as described in the text.

The expected 95% CL upper limit on the production cross section of the T2tt simplified model as a function of the top squark and LSP masses. No interpretation is provided for signal models for which ${|{m_{\tilde{t}} - m_{\tilde{\chi}^0_1} - m_t}| < 25 GeV}$ and ${m_{\tilde{t}} < 275 GeV}$ as described in the text.

The observed exclusion contour of the T2tt simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$). No interpretation is provided for signal models for which ${|{m_{\tilde{t}} - m_{\tilde{\chi}^0_1} - m_t}| < 25 GeV}$ and ${m_{\tilde{t}} < 275 GeV}$ as described in the text.

The mean expected exclusion contour of the T2tt simplified model and the region containing 68 and 95\% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis. No interpretation is provided for signal models for which ${|{m_{\tilde{t}} - m_{\tilde{\chi}^0_1} - m_t}| < 25 GeV}$ and ${m_{\tilde{t}} < 275 GeV}$ as described in the text.

The observed 95% CL upper limit on the production cross section of the T2bW simplified model as a function of the top squark and LSP masses.

The expected 95% CL upper limit on the production cross section of the T2bW simplified model as a function of the top squark and LSP masses.

The observed exclusion contour of the T2bW simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T2bW simplified model and the region containing 68 and 95\% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T2tb simplified model as a function of the top squark and LSP masses.

The expected 95% CL upper limit on the production cross section of the T2tb simplified model as a function of the top squark and LSP masses.

The observed exclusion contour of the T2tb simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T2tb simplified model and the region containing 68 and 95\% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T2ttC simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The expected 95% CL upper limit on the production cross section of the T2ttC simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The observed exclusion contour of the T2ttC simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T2ttC simplified model and the region containing 68\% ($\pm 1\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T2bWC simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The expected 95% CL upper limit on the production cross section of the T2bWC simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The observed exclusion contour of the T2bWC simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T2bWC simplified model and the region containing 68\% ($\pm 1\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T2cc simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The expected 95% CL upper limit on the production cross section of the T2cc simplified model as a function of the top squark mass and the difference between the top squark and LSP masses.

The observed exclusion contour of the T2cc simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T2cc simplified model and the region containing 68\% ($\pm 1\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T1tttt simplified model as a function of the gluino and LSP masses.

The expected 95% CL upper limit on the production cross section of the T1tttt simplified model as a function of the gluino and LSP masses.

The observed exclusion contour of the T1tttt simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T1tttt simplified model and the region containing 68 and 95\% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T1ttbb simplified model as a function of the gluino and LSP masses.

The expected 95% CL upper limit on the production cross section of the T1ttbb simplified model as a function of the gluino and LSP masses.

The observed exclusion contour of the T1ttbb simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$).

The mean expected exclusion contour of the T1ttbb simplified model and the region containing 68 and 95\% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis.

The observed 95% CL upper limit on the production cross section of the T5ttcc simplified model as a function of the gluino and LSP masses. The upper limits do not take into account contributions from direct top squark pair production; however, its effect is small for $m_{\tilde{\chi}^0_1} > 600 GeV$, which corresponds to the phase space beyond the exclusions based on direct top squark pair production. The excluded regions based on direct top squark pair production from this search and earlier searches are indicated by the hatched areas.

The expected 95% CL upper limit on the production cross section of the T5ttcc simplified model as a function of the gluino and LSP masses. The uppser limits do not take into account contributions from direct top squark pair production; however, its effect is small for $m_{\tilde{\chi}^0_1} > 600 GeV$, which corresponds to the phase space beyond the exclusions based on direct top squark pair production. The excluded regions based on direct top squark pair production from this search and earlier searches are indicated by the hatched areas.

The observed exclusion contour of the T5ttcc simplified model with respect to approximate NNLO+NNLL signal cross sections and the change in this contour due to variation of these cross sections within their theoretical uncertainties ($\sigma_{\text{theory}}$). The expected and observed upper limits do not take into account contributions from direct top squark pair production; however, its effect is small for $m_{\tilde{\chi}^0_1} > 600 GeV$, which corresponds to the phase space beyond the exclusions based on direct top squark pair production. The excluded regions based on direct top squark pair production from this search and earlier searches are indicated by the hatched areas.

The mean expected exclusion contour of the T5ttcc simplified model and the region containing 68% and 95% ($\pm 1$ and $2\,\sigma_{\text{experiment}}$) of the distribution of expected exclusion limits under the background-only hypothesis. The expected and observed upper limits do not take into account contributions from direct top squark pair production; however, its effect is small for $m_{\tilde{\chi}^0_1} > 600 GeV$, which corresponds to the phase space beyond the exclusions based on direct top squark pair production. The excluded regions based on direct top squark pair production from this search and earlier searches are indicated by the hatched areas.

Figure 3 (upper). Distribution of $M_{T2}(ll)$ in a control region enriched in $t\bar{t}$ events defined by requiring at least 2 jets, at least one of them b-tagged, and missing transverse momentum below 80 GeV. For the plot, simulated yields are normalized to data using the yields in the $M_{T2}(ll)$ < 100 GeV region.

Figure 4 (upper). Expected and observed yields in the five $t\bar{t}Z$ control regions, which are defined by different requirements on the number of reconstructed jets and b jets, before the fit.

Figure 4 (lower). Expected and observed yields in the five $t\bar{t}Z$ control regions, which are defined by different requirements on the number of reconstructed jets and b jets, after the fit.

Figure 5 (left). Distribution of $M_{T2}(ll)$ of SF events falling within in the Z boson mass window with at least two jets and no b jet, $p_{T}^{miss} > 80$ GeV and $M_{T2}(ll) > 100$ GeV.

Figure 5 (center). Distribution of $M_{T2}(blbl)$ of SF events falling within in the Z boson mass window with at least two jets and no b jet, $p_{T}^{miss} > 80$ GeV and $M_{T2}(ll) > 100$ GeV.

Figure 5 (right). Distribution of $p_{T}^{miss}$ of SF events falling within in the Z boson mass window with at least two jets and no b jet, $p_{T}^{miss} > 80$ GeV and $M_{T2}(ll) > 100$ GeV.

Figure 6. Event yields in the 13 Drell-Yan and multiboson control regions for events with SF leptons falling within the Z boson mass window and no b jets, after renormalizing with the scale factors obtained from the fit procedure described in the text.

Figure 7 (left). Distributions of $M_{T2}(ll)$ for observed events in the dimuon channel compared to the predicted SM background.

Figure 7 (center). Distributions of $M_{T2}(ll)$ for observed events in the dielectron channel compared to the predicted SM background.

Figure 7 (right). Distributions of $M_{T2}(ll)$ for observed events in the electron-muon channel compared to the predicted SM background.

Figure 8 (left). Distributions of $M_{T2}(ll)$ for all lepton flavors for the defined selection.

Figure 8 (center). Distributions of $M_{T2}(blbl)$ for all lepton flavors for the defined selection, after requiring $M_{T2}(ll) > 100$ GeV.

Figure 8 (right). Distributions of $p_{T}^{miss}$ for all lepton flavors for the defined selection, after requiring $M_{T2}(ll) > 100$ GeV.

Figure 9 (upper). Predicted backgrounds and observed yields in the dielectron and dimuon search regions. The yields are post fit and correspond to the numbers quoted in Tab. 4 of the publication.

Figure 9 (lower). Predicted backgrounds and observed yields in the electron-muon search regions. The yields are post fit and correspond to the numbers quoted in Tab. 4 of the publication.

Figure 10. Predicted backgrounds and observed yields in all search regions combined. The yields are post fit and correspond to the numbers quoted in Tab. 4 of the publication.

Figure 11 (upper). Observed limits for the T2tt model in the top squark - LSP mass plane. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane.

Figure 11 (upper). Observed exclusion region at 95% CL assuming 100% branching fraction.

Figure 11 (upper). Expected exclusion region at 95% CL assuming 100% branching fraction.

Figure 11 (lower). Observed limits for the T2bW model in the top squark - LSP mass plane. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane.

Figure 11 (lower). Observed exclusion region at 95% CL assuming 100% branching fraction.

Figure 11 (lower). Expected exclusion region at 95% CL assuming 100% branching fraction.

Figure 12 (upper left). Observed limits for the T8bbllnunu model in the top squark - LSP mass plane. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.05 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (upper left). Observed exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.05 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (upper left). Expected exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.05 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (upper left). Observed limits for the T8bbllnunu model in the top squark - LSP mass plane. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.5 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (upper left). Observed exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.5 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (upper left). Expected exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.5 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (lower). Observed limits for the T8bbllnunu model in the top squark - LSP mass plane. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.95 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (lower). Observed exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.95 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 12 (lower). Expected exclusion region at 95% CL assuming 100% branching fraction. $m_{\tilde{\chi}^{\pm}_{1}} = 0.5 (m_{\tilde{t}_{1}} + m_{\tilde{\chi}^{0}_{1}})$, $m_{\tilde{l}} = 0.95 (m_{\tilde{\chi}^{\pm}_{1}} - m_{\tilde{\chi}^{0}_{1}}) + m_{\tilde{\chi}^{0}_{1}}$

Figure 13. Observed limits for the T2tt model in the top squark - LSP mass plane combining the dilepton final state with single-lepton and the all-hadronic final states. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane.

Figure 13. Observed exclusion region at 95% CL assuming 100% branching fraction.

Figure 13. Expected exclusion region at 95% CL assuming 100% branching fraction.

Figure 14. Observed limits for the T2bW model in the top squark - LSP mass plane combining the dilepton final state with single-lepton and the all-hadronic final states. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane.

Figure 14. Observed exclusion region at 95% CL assuming 100% branching fraction.

Figure 14. Expected exclusion region at 95% CL assuming 100% branching fraction.

Additional Figure 3. Observed limits for the T2tt model in the top squark - LSP mass plane using aggregate signal regions. The numbers indicate the 95% CL upper limit on the cross section times the square of the branching fraction at each point of the plane.

Additional Figure 3. Observed exclusion region at 95% CL assuming 100% branching fraction.

Additional Figure 3. Expected exclusion region at 95% CL assuming 100% branching fraction.

Table 5. Ratios of $\mu=\frac{\sigma$}{\sigma_{theory}}$ of the 95% CL expected and observed limits to simplified model expectations for different DM particle masses and mediator masses.

Table 6. Expected and observed event yields, summed over all lepton flavors, in aggregate signal regions.

Table 7 (upper). Covariance matrix for the background prediction in aggregate signal regions.

Table 7 (lower). Correlation matrix for the background prediction in aggregate signal regions.

Additional Figure 1. Correlation matrix of the 13 signal regions, split into same-flavor (SF) and different-flavor (DF) regions.

Additional Figure 2. Covariance matrix of the 13 signal regions, split into same-flavor (SF) and different-flavor (DF) regions.