The invariant mass spectra of dimuon events. The points with error bars represent the observed yield. The histogram represents the expectations from the SM processes. The bins have equal width in logarithmic scale so that the width in GeV becomes larger with increasing mass.

The invariant mass distribution of pairs of electrons observed in data and expected from simulated SM processes for $\cos\theta^* < 0$. The bin width gradually increases with mass. The quoted uncertainty represents the combined statistical and systematic uncertainties on the background. The signal contribution expected from the constructive LL CI model with $\Lambda = 16$ TeV is shown as a dashed green line.

The invariant mass distribution of pairs of electrons observed in data and expected from simulated SM processes for $\cos\theta^* /geq 0$. The bin width gradually increases with mass. The quoted uncertainty represents the combined statistical and systematic uncertainties on the background. The signal contribution expected from the constructive LL CI model with $\Lambda = 16$ TeV is shown as a dashed green line.

The invariant mass distribution of pairs of muons observed in data and expected from simulated SM processes for $\cos\theta^* < 0$. The bin width gradually increases with mass. The quoted uncertainty represents the combined statistical and systematic uncertainties on the background. The signal contribution expected from the constructive LL CI model with $\Lambda = 16$ TeV is shown as a dashed green line.

The invariant mass distribution of pairs of muons observed in data and expected from simulated SM processes for $\cos\theta^* /geq 0$. The bin width gradually increases with mass. The quoted uncertainty represents the combined statistical and systematic uncertainties on the background. The signal contribution expected from the constructive LL CI model with $\Lambda = 16$ TeV is shown as a dashed green line.

Observed and expected background yields for different mass ranges in the dielectron channel. The sum of all background contributions is shown as well as a breakdown into the three main categories. The quoted uncertainty includes both the statistical and the systematic components.

Observed and expected background yields for different mass ranges in the dimuon channel. The sum of all background contributions is shown as well as a breakdown into the three main categories. The quoted uncertainty includes both the statistical and the systematic components.

The observed upper limits at 95% CL on the product of production cross section and branching fraction for a spin-1 resonance with a width equal to 0.6% of the resonance mass, relative to the product of production cross section and branching fraction of a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

The expected upper limits together with the 68 and 95% quantiles at 95% CL on the product of production cross section and branching fraction for a spin-1 resonance with a width equal to 0.6% of the resonance mass, relative to the product of production cross section and branching fraction of a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

The observed upper limits at 95% CL on the product of production cross section and branching fraction for a spin-1 resonance, for widths equal to 0.6, 3, 5, and 10% of the resonance mass, relative to the product of production cross section and branching fraction for a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

The expected upper limits at 95% CL on the product of production cross section and branching fraction for a spin-1 resonance, for widths equal to 0.6, 3, 5, and 10% of the resonance mass, relative to the product of production cross section and branching fraction for a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

Limits in the ( $c_{d}$ , $c_{u}$ ) plane obtained by recasting the combined limit at 95% CL on the $Z'$ boson cross section from dielectron and dimuon channels. The closed contour representing the GSM model class is composed of thick line segments. Each point on a segment corresponds to a particular model, and the location of the point gives the mass limit on the relevant $Z'$ boson. As indicated in the bottom left legend, the segment line styles correspond to ranges of the particular mixing angle for each considered model. The bottom right legend indicates the constituents of each model class.

Limits in the ( $c_{d}$ , $c_{u}$ ) plane obtained by recasting the combined limit at 95% CL on the $Z'$ boson cross section from dielectron and dimuon channels. The closed contour representing the LR model class is composed of thick line segments. Each point on a segment corresponds to a particular model, and the location of the point gives the mass limit on the relevant $Z'$ boson. As indicated in the bottom left legend, the segment line styles correspond to ranges of the particular mixing angle for each considered model. The bottom right legend indicates the constituents of each model class.

Limits in the ( $c_{d}$ , $c_{u}$ ) plane obtained by recasting the combined limit at 95% CL on the $Z'$ boson cross section from dielectron and dimuon channels. The closed contour representing the E6 model class is composed of thick line segments. Each point on a segment corresponds to a particular model, and the location of the point gives the mass limit on the relevant $Z'$ boson. As indicated in the bottom left legend, the segment line styles correspond to ranges of the particular mixing angle for each considered model. The bottom right legend indicates the constituents of each model class.

The observed local p-value for the dielectron channel as a function of the dilepton invariant mass.

The observed local p-value for the dimuon channel as a function of the dilepton invariant mass.

The observed local p-value for the combined channel as a function of the dilepton invariant mass.

The observed upper limits at 95% CL on the product of production cross section and branching fraction for a spin-2 resonance with a width equal to 0.6% of the resonance mass, relative to the product of production cross section and branching fraction of a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

The expected upper limits together with the 68 and 95% quantiles at 95% CL on the product of production cross section and branching fraction for a spin-2 resonance with a width equal to 0.6% of the resonance mass, relative to the product of production cross section and branching fraction of a Z boson, multiplied by the theoretical value of the cross section for $\sigma(pp \to \mathrm{Z}+X \to\ell\ell+X)$ of 1928 pb.

Limits at 95% confidence level for the masses of the DM particle, which is assumed to be Dirac fermion, and its associated mediator, in a simplified model of DM production via a vector mediator. The parameter exclusion is obtained by comparing the limits on product of the production cross section and the branching fraction for decay to a Z boson, with the values obtained from calculations in the simplified model. For each combination of the DM particle and mediator mass values, the width of the mediator is taken into account in the limit calculation. The lines with the hatching represents the excluded regions. The solid grey lines, marked as “Ωh 2 ≥ 0.12”, correspond to parameter regions that reproduce the observed DM relic density in the universe, with the hatched area indicating the region where the DM relic abundance exceeds the observed value.

Limits at 95% confidence level for the masses of the DM particle, which is assumed to be Dirac fermion, and its associated mediator, in a simplified model of DM production via a vector mediator. The parameter exclusion is obtained by comparing the limits on product of the production cross section and the branching fraction for decay to a Z boson, with the values obtained from calculations in the simplified model. For each combination of the DM particle and mediator mass values, the width of the mediator is taken into account in the limit calculation. The lines with the hatching represents the excluded regions. The solid grey lines, marked as “Ωh 2 ≥ 0.12”, correspond to parameter regions that reproduce the observed DM relic density in the universe, with the hatched area indicating the region where the DM relic abundance exceeds the observed value.

Limits at 95% confidence level for the masses of the DM particle, which is assumed to be Dirac fermion, and its associated mediator, in a simplified model of DM production via a axial vector. The parameter exclusion is obtained by comparing the limits on product of the production cross section and the branching fraction for decay to a Z boson, with the values obtained from calculations in the simplified model. For each combination of the DM particle and mediator mass values, the width of the mediator is taken into account in the limit calculation. The lines with the hatching represents the excluded regions. The solid grey lines, marked as “Ωh 2 ≥ 0.12”, correspond to parameter regions that reproduce the observed DM relic density in the universe, with the hatched area indicating the region where the DM relic abundance exceeds the observed value.

Limits at 95% confidence level for the masses of the DM particle, which is assumed to be Dirac fermion, and its associated mediator, in a simplified model of DM production via a axial vector. The parameter exclusion is obtained by comparing the limits on product of the production cross section and the branching fraction for decay to a Z boson, with the values obtained from calculations in the simplified model. For each combination of the DM particle and mediator mass values, the width of the mediator is taken into account in the limit calculation. The lines with the hatching represents the excluded regions. The solid grey lines, marked as “Ωh 2 ≥ 0.12”, correspond to parameter regions that reproduce the observed DM relic density in the universe, with the hatched area indicating the region where the DM relic abundance exceeds the observed value.

Exclusion limits at 95% CL on the ultraviolet cutoff for the dielectron channel, with $m_{\ell\ell}>1.8$ TeV ($m_{\ell\ell}>1.9$ TeV for 2016) in the GRW, Hewett, and HLZ conventions for the ADD model. Signal model cross sections are calculated up to LO, and an NNLO correction factor of 1.3 is applied.

Exclusion limits at 95% CL on the ultraviolet cutoff for the dimuon channel, with $m_{\ell\ell}>1.8$ TeV ($m_{\ell\ell}>1.9$ TeV for 2016) in the GRW, Hewett, and HLZ conventions for the ADD model. Signal model cross sections are calculated up to LO, and an NNLO correction factor of 1.3 is applied.

Exclusion limits at 95% CL on the ultraviolet cutoff for the combination of the dielectron and dimuon channel, with $m_{\ell\ell}>1.8$ TeV ($m_{\ell\ell}>1.9$ TeV for 2016) in the GRW, Hewett, and HLZ conventions for the ADD model. Signal model cross sections are calculated up to LO, and an NNLO correction factor of 1.3 is applied.

Dilepton lower exclusion limits at 95% CL on the CI scale ($\Lambda$) for the eight CI models considered, for the dielectron channel. The limits are obtained for $m_{\ell\ell}>400$ GeV.

Dilepton lower exclusion limits at 95% CL on the CI scale ($\Lambda$) for the eight CI models considered, for the dimuon channel. The limits are obtained for $m_{\ell\ell}>400$ GeV.

Dilepton lower exclusion limits at 95% CL on the CI scale ($\Lambda$) for the eight CI models considered, for the combination of the dielectron and dimuon channels. The limits are obtained for $m_{\ell\ell}>400$ GeV.

Ratio of the differential dilepton production cross section in the dimuon and dielectron channels $R_{\mu^{+}\mu^{-}/e^{+}e^{-}}$, as a function of $m_{\ell\ell}$ for events with central leptons. The ratio is obtained after correcting the reconstructed mass spectra to particle level.

Ratio of the differential dilepton production cross section in the dimuon and dielectron channels $R_{\mu^{+}\mu^{-}/e^{+}e^{-}}$, as a function of $m_{\ell\ell}$ for events with forward leptons. The ratio is obtained after correcting the reconstructed mass spectra to particle level.

Invariant mass resolution for dielectron pairs as obtained from simulated DY samples as a function of generated mass.

Invariant mass resolution for dimuon pairs as obtained from simulated DY samples as a function of generated mass.

Observed data and total background estimate in all bins used in the limit calculation for the CI limits. The total event sample is split into the three years of data taking, the two lepton flavors, two categories in $\cos\theta^*$, and two categories in lepton pseudorapidity. Furthermore, each of these categories is split into 6 bins in dilepton invariant mass: [400,500,700,1100,1900,3500,10000] in GeV. The bin names indicate the $\cos\theta^*$ bin (cspos for positive values and csneg for negative values), the lepton flavor (dielectron or dimuon), the year of data taking (2016, 2017, 2018) with associated integrated luminosities of 35.9, 41.5, and 59.4 $\mathrm{fb}^{-1}$ (36.3, 42.1, 61.3 $\mathrm{fb}^{-1}$ in the dimuon channel), respectively. The lepton $|\eta|$ categories are labelled as BB (both leptons with $|\eta| < 1.442$ for electrons and $|\eta| < 1.2$ for muons) and BE (One electron with $|\eta| < 1.442$ and one with $|\eta| > 1.562$ or for muons at least one with $|\eta| > 1.2$). The mass bins are numbered in ascending order.

Observed data and total background estimate in all bins used in the limit calculation for the ADD limits. The total event sample is split into the three years of data taking, the two lepton flavors, two categories in $\cos\theta^*$, and two categories in lepton pseudorapidity. Furthermore, each of these categories is split into 5 bins in dilepton invariant mass: [1800,2200,2600,3000,3400,10000] ([1900,2200,2600,3000,3400,10000] for 2016) in GeV. The bin names indicate the $\cos\theta^*$ bin (cspos for positive values and csneg for negative values), the lepton flavor (dielectron or dimuon), the year of data taking (2016, 2017, 2018) with associated integrated luminosities of 35.9, 41.5, and 59.4 $\mathrm{fb}^{-1}$ (36.3, 42.1, 61.3 $\mathrm{fb}^{-1}$ in the dimuon channel), respectively. The lepton $|\eta|$ categories are labelled as BB (both leptons with $|\eta| < 1.442$ for electrons and $|\eta| < 1.2$ for muons) and BE (One electron with $|\eta| < 1.442$ and one with $|\eta| > 1.562$ or for muons at least one with $|\eta| > 1.2$). The mass bins are numbered in ascending order.

Bin-by-bin correlation for the limit calculation for the CI limits. The bin names indicate the $\cos\theta^*$ bin (cspos for positive values and csneg for negative values), the lepton flavor (dielectron or dimuon), the year of data taking (2016, 2017, 2018) with associated integrated luminosities of 35.9, 41.5, and 59.4 $\mathrm{fb}^{-1}$ (36.3, 42.1, 61.3 $\mathrm{fb}^{-1}$ in the dimuon channel), respectively. The lepton $|\eta|$ categories are labelled as BB (both leptons with $|\eta| < 1.442$ for electrons and $|\eta| < 1.2$ for muons) and BE (One electron with $|\eta| < 1.442$ and one with $|\eta| > 1.562$ or for muons at least one with $|\eta| > 1.2$). The mass bins are numbered in ascending order.

Bin-by-bin correlation for the limit calculation for the ADD limits. The bin names indicate the $\cos\theta^*$ bin (cspos for positive values and csneg for negative values), the lepton flavor (dielectron or dimuon), the year of data taking (2016, 2017, 2018) with associated integrated luminosities of 35.9, 41.5, and 59.4 $\mathrm{fb}^{-1}$ (36.3, 42.1, 61.3 $\mathrm{fb}^{-1}$ in the dimuon channel), respectively. The lepton $|\eta|$ categories are labelled as BB (both leptons with $|\eta| < 1.442$ for electrons and $|\eta| < 1.2$ for muons) and BE (One electron with $|\eta| < 1.442$ and one with $|\eta| > 1.562$ or for muons at least one with $|\eta| > 1.2$). The mass bins are numbered in ascending order.

Inclusive differential cross section for two electrons and two muons (Max = 1710~GeV).

Mass of the first dilepton pair in the $Z$ mass region (Max = 88.1~GeV).

Mass of the first dilepton pair in the $H$ mass region (Max = 107~GeV).

Mass of the first dilepton pair in the offshell region (Max = 146~GeV).

Mass of the first dilepton pair in the $ZZ$ mass region (Max = 232~GeV).

Mass of the second dilepton pair in the $Z$ mass region (Max = 44.2~GeV).

Mass of the second dilepton pair in the $H$ mass region (Max = 59.6~GeV).

Mass of the second dilepton pair in the offhell region (Max = 88.3~GeV).

Mass of the second dilepton pair in the $ZZ$ mass region (Max = 1000~GeV).

$p_T$ of the first dilepton pair in the $Z$ mass region (Max = 291~GeV).

$p_T$ of the first dilepton pair in the $H$ mass region (Max = 245~GeV).

$p_T$ of the first dilepton pair in the offshell region (Max = 216~GeV).

$p_T$ of the first dilepton pair in the $ZZ$ mass region (Max = 555~GeV).

$p_T$ of the second dilepton pair in the $Z$ mass region (Max = 117~GeV).

$p_T$ of the second dilepton pair in the $H$ mass region (Max = 124~GeV).

$p_T$ of the second dilepton pair in the offhell region (Max = 192~GeV).

$p_T$ of the second dilepton pair in the $ZZ$ mass region (Max = 555~GeV).

$\cos\theta^*$ between first dilepton pair in the $Z$ mass region.

$\cos\theta^*$ between first dilepton pair in the offshell region.

$\cos\theta^*$ between first dilepton pair in the $H$ mass region.

$\cos\theta^*$ between first dilepton pair in the $ZZ$ mass region.

$\cos\theta^*$ between second dilepton pair in the $Z$ mass region.

$\cos\theta^*$ between second dilepton pair in the $H$ mass region.

$\cos\theta^*$ between second dilepton pair in the offshell mass region.

$\cos\theta^*$ between second dilepton pair in the $ZZ$ mass region.

$\Delta y$ between the dilepton pairs in the $Z$ mass region.

$\Delta y$ between the dilepton pairs in the $H$ mass region.

$\Delta y$ between the dilepton pairs in the offshell region.

$\Delta y$ between the dilepton pairs in the $ZZ$ mass region.

$\Delta \phi$ between the dilepton pairs in the $Z$ mass region.

$\Delta \phi$ between the dilepton pairs in the $H$ mass region.

$\Delta \phi$ between the dilepton pairs in the offshell region.

$\Delta \phi$ between the dilepton pairs in the $ZZ$ mass region.

$\Delta \phi$ between the leading lepton pairs in the $Z$ mass region.

$\Delta \phi$ between the leading lepton pairs in the $H$ mass region.

$\Delta \phi$ between the leding lepton pairs in the offshell region.

$\Delta \phi$ between the leading lepton pairs in the $ZZ$ mass region.

Four lepton mass in first $p_T^{4l}$ slice (Max = 726~GeV)

Four lepton mass in second $p_T^{4l}$ slice (Max = 1079~GeV)

Four lepton mass in third $p_T^{4l}$ slice (Max = 1153~GeV)

Four lepton mass in fourth $p_T^{4l}$ slice (Max = 1320~GeV)

Four lepton mass in fifth $p_T^{4l}$ slice (Max = 1413~GeV)

Four lepton mass in first $y^{4l}$ slice (Max = 1710~GeV)

Four lepton mass in second $y^{4l}$ slice (Max = 1116~GeV)

Four lepton mass in third $y^{4l}$ slice (Max = 1413~GeV)

Four lepton mass in fourth $y^{4l}$ slice (Max = 1044~GeV)

Four lepton mass in fifth $y^{4l}$ slice (Max = 918~GeV)

Covariance matrix for M4l

Covariance matrix for M4lvChannel

Covariance matrix for m12_vs_M4l

Covariance matrix for m34_vs_M4l

Covariance matrix for pt12_vs_M4l

Covariance matrix for pt34_vs_M4l

Covariance matrix for CTS12_vs_M4l

Covariance matrix for CTS34_vs_M4l

Covariance matrix for dYpairs_vs_M4l

Covariance matrix for dPhiPairs_vs_M4l

Covariance matrix for dPhiLeadLep_vs_M4l

Covariance matrix for M4lvPt4lbin

Covariance matrix for M4lvRapiditybin

EFT results (linear)

EFT results (full)

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.

Observed and expected limits on $\tan\beta$ as a function of $m_{H^+}$ in the $M_h^{125}(\tilde{\chi})$ scenario. Limits are shown for $\tan\beta$ values in the range of 0.5-60 due to the availability of the model prediction. The bands surrounding the expected limits show the 68% and 95% confidence intervals. Uncertainties in the predicted $H^+$ cross-sections or branching ratios are not considered.

Observed and expected limits on $\tan\beta$ as a function of $m_{H^+}$ in the $M_h^{125}(\tilde{\tau})$ scenario. Limits are shown for $\tan\beta$ values in the range of 0.5-60 due to the availability of the model prediction. The bands surrounding the expected limits show the 68% and 95% confidence intervals. Uncertainties in the predicted $H^+$ cross-sections or branching ratios are not considered.

Observed and expected limits on $\tan\beta$ as a function of $m_{H^+}$ in the $M_h^{125}$(alignment) scenario. Limits are shown for $\tan\beta$ values in the range of 0.5-60 due to the availability of the model prediction. The bands surrounding the expected limits show the 68% and 95% confidence intervals. Uncertainties in the predicted $H^+$ cross-sections or branching ratios are not considered.

Observed and expected limits on $\tan\beta$ as a function of $m_{H^+}$ in the $M_{h_1}^{125}$(CPV) scenario. Limits are shown for $\tan\beta$ values in the range of 0.5-60 due to the availability of the model prediction. The bands surrounding the expected limits show the 68% and 95% confidence intervals. Uncertainties in the predicted $H^+$ cross-sections or branching ratios are not considered.

Event yields of the SM background processes and the 800 GeV $H^{+}$ sample in the four analysis regions before the fit to the data. Uncertainties include both statistical and systematic uncertainties. The yields of the $H^{+}$ signal sample correspond to a cross-section times branching fraction of 10 pb.

Event acceptance for the different $H^+$ mass signal samples.

Three-jet events $\Delta R_{23}$ for hard radiation ($p_{\mathrm{T}3}/p_{\mathrm{T}2}$ > 0.6)

Three-jet events $p_{\mathrm{T}3}/p_{\mathrm{T}2}$ for small-angle radiation ($\Delta R_{23}$ < 1.0)

Three-jet events $p_{\mathrm{T}3}/p_{\mathrm{T}2}$ for large-angle radiation ($\Delta R_{23}$ > 1.0)

Three-jet events $\Delta R_{23}$ for soft radiation ($p_{\mathrm{T}3}/p_{\mathrm{T}2}$ < 0.3)

Three-jet events $\Delta R_{23}$ for hard radiation ($p_{\mathrm{T}3}/p_{\mathrm{T}2}$ > 0.6)

Z + two-jet events $p_{\mathrm{T}3}/p_{\mathrm{T}2}$ for small-angle radiation ($\Delta R_{23}$ < 1.0)

Z + two-jet events $p_{\mathrm{T}3}/p_{\mathrm{T}2}$ for large-angle radiation ($\Delta R_{23}$ > 1.0)

Z + two-jet events $\Delta R_{23}$ for soft radiation ($p_{\mathrm{T}3}/p_{\mathrm{T}2}$ < 0.3)

Z + two-jet events $\Delta R_{23}$ for hard radiation ($p_{\mathrm{T}3}/p_{\mathrm{T}2}$ > 0.6)

The product of signal acceptance and efficiency in the 2l categories for the signal produced via vector boson fusion.

$m_{X}^{T}$ distribution in data in the 0l 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}^{T}$ observed in the SR.

$m_{X}^{T}$ distribution in data in the 0l $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}^{T}$ observed in the SR.

$m_{X}$ distribution in data in the 2e 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2e $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2$\mu$ 2b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2$\mu$ $\leq$1b non-VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}^{T}$ distribution in data in the 0l 2b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}^{T}$ observed in the SR.

$m_{X}^{T}$ distribution in data in the 0l $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}^{T}$ observed in the SR.

$m_{X}$ distribution in data in the 2e 2b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2e $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2$\mu$ 2b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

$m_{X}$ distribution in data in the 2$\mu$ $\leq$1b VBF category. The data is shown as Events/10 GeV. The distribution is shown up 4000 GeV, which corresponds to the event with the highest $m_{X}$ observed in the SR.

Observed and expected 95% CL upper limit on $\sigma \mathcal{B}$(Z'-> ZH) with all categories combined for the non-VBF signal, including all statistical and systematic uncertainties. The inner green band and the outer yellow band indicate the regions containing 68 and 95%, respectively, of the distribution of expected limits under the background-only hypothesis. The CMS search for a heavy resonance using 2016 data and the same final state [JHEP 11 (2018) 172] is shown as a comparison.

Observed and expected 95% CL upper limit on $\sigma \mathcal{B}$(Z'-> ZH) with all categories combined for the VBF signal, including all statistical and systematic uncertainties. The inner green band and the outer yellow band indicate the regions containing 68 and 95%, respectively, of the distribution of expected limits under the background-only hypothesis.

Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 2 TeV for the non-VBF signal.

Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 3 TeV for the non-VBF signal.

Observed exclusion limit in the space of the HVT model parameters [$g_{V}c_{H}$, $g^{2}c_{F}/g_{V}$] for mass hypotheses of 4 TeV for the non-VBF signal.

Fitted background prediction and observed data counts for 2018B as functions of $N_{\text{jets}}$ in each of the four $S_{\textrm{NN}}$ bins. The signal distributions normalized to the predicted cross section for the RPV model with $m_{\tilde{t}}$ = 450 GeV and the stealth SYY model with $m_{\tilde{t}}$ = 850 GeV are shown for comparison.

Expected and observed 95% CL upper limit on the top squark pair production cross section as a function of the top squark mass for the RPV SUSY models.

Expected and observed 95% CL upper limit on the top squark pair production cross section as a function of the top squark mass for the stealth SYY SUSY models.

Cut flow of the signal region selection decribed in section II.

Cut flow of the signal region selection decribed in section II.

Cut flow of the signal region selection decribed in section II.

Cut flow of the signal region selection decribed in section II.

95% CL limits on the Lagrangian approach (a.k.a. LEP parametrization) parameters in Wgamma events.