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CMS-EXO-19-008 ; CERN-EP-2020-171
MUSiC: a model unspecific search for new physics in proton-proton collisions at $\sqrt{s} = $ 13 TeV
Eur. Phys. J. C 81 (2021) 629
Abstract: Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb$^{-1}$, are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.
Figures & Tables Summary Additional Figures References CMS Publications
Figures

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Figure 1:
Illustrative example of classification of a single event (red square) containing one electron, two muons, and one jet. This event will contribute to precisely one exclusive (green), and several inclusive (blue) and jet-inclusive (orange) event classes.

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Figure 2:
Illustration for the calculation of $p$-value in different regions and the selection of the RoI as the region with the smallest $p$-value.

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Figure 3:
Illustrative example of a $\tilde{p}$-value distribution for different event classes (final states) based on a RoI scan of an ${S_{\mathrm {T}}}$ distribution. Histograms of the number of event classes corresponding to a bin in $-\log_{10}({\tilde{p}})$ for the different pseudo-experiment rounds (shown on the left) are used to create the global overview plot for a scan of each particular kinematic distribution for each event class type (shown on the right for an ${S_{\mathrm {T}}}$ distribution scan in exclusive event classes, without showing the observed deviations from data here). The mean and the median distributions of $\tilde{p}$-values obtained from the different pseudo-experiments are shown as solid cyan and dotted grey lines. The distribution estimated from the analytic calculation is shown as a green dashed line. The 68% ($ \pm $1$ \sigma $) and 95% ($ \pm $2$ \sigma $) uncertainty bands are displayed as dark and light blue areas, respectively.

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Figure 4:
Distribution of the transverse mass for the 1$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $ exclusive class with a hypothetical SSM W' boson (with mass of 3 TeV) along with the SM simulation.

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Figure 5:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the invariant mass (transverse mass for classes with ${{p_{\mathrm {T}}} ^\text {miss}}$) with assumed values for the mass of the SSM W' boson of 2 (upper), 3 ()lower left), and 4 TeV (lower right). The uncertainty in the distribution of $\tilde{p}$-values for the signal is obtained from the variations in the pseudo-data performed with the W' signal simulation.

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Figure 5-a:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the invariant mass (transverse mass for classes with ${{p_{\mathrm {T}}} ^\text {miss}}$) with assumed values for the mass of the SSM W' boson of 2 (upper), 3 ()lower left), and 4 TeV (lower right). The uncertainty in the distribution of $\tilde{p}$-values for the signal is obtained from the variations in the pseudo-data performed with the W' signal simulation.

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Figure 5-b:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the invariant mass (transverse mass for classes with ${{p_{\mathrm {T}}} ^\text {miss}}$) with assumed values for the mass of the SSM W' boson of 2 (upper), 3 ()lower left), and 4 TeV (lower right). The uncertainty in the distribution of $\tilde{p}$-values for the signal is obtained from the variations in the pseudo-data performed with the W' signal simulation.

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Figure 5-c:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the invariant mass (transverse mass for classes with ${{p_{\mathrm {T}}} ^\text {miss}}$) with assumed values for the mass of the SSM W' boson of 2 (upper), 3 ()lower left), and 4 TeV (lower right). The uncertainty in the distribution of $\tilde{p}$-values for the signal is obtained from the variations in the pseudo-data performed with the W' signal simulation.

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Figure 6:
Distribution of $\tilde{p}$-values for the RoI scan in inclusive classes for the ${S_{\mathrm {T}}}$ distributions for a sphaleron signal with $E_{\text {sph}} = $ 8 TeV and PEF = 0.05. The uncertainty in the distribution of $\tilde{p}$-values for the signal is obtained from the variations in the pseudo-data performed with the sphaleron signal simulation.

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Figure 7:
Distributions of ${S_{\mathrm {T}}}$ for the 3$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $ exclusive class without (left) and with (right) $\mathrm{W} \mathrm{Z} $ production as part of the SM simulation. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest.

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Figure 7-a:
Distributions of ${S_{\mathrm {T}}}$ for the 3$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $ exclusive class without (left) and with (right) $\mathrm{W} \mathrm{Z} $ production as part of the SM simulation. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest.

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Figure 7-b:
Distributions of ${S_{\mathrm {T}}}$ for the 3$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $ exclusive class without (left) and with (right) $\mathrm{W} \mathrm{Z} $ production as part of the SM simulation. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest.

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Figure 8:
Data and SM predictions for the most significant exclusive event classes, where the significance of an event class is calculated in a single aggregated bin. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The values above the plot indicate the observed $p$-value for each event class.

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Figure 9:
Overview of total event yields for event classes corresponding to the double-electron (upper) and for the single-muon + ${{p_{\mathrm {T}}} ^\text {miss}}$ object groups (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above each plot indicate the observed $p$-value for the agreement of data and simulation for the corresponding event class.

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Figure 9-a:
Overview of total event yields for event classes corresponding to the double-electron (upper) and for the single-muon + ${{p_{\mathrm {T}}} ^\text {miss}}$ object groups (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above each plot indicate the observed $p$-value for the agreement of data and simulation for the corresponding event class.

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Figure 9-b:
Overview of total event yields for event classes corresponding to the double-electron (upper) and for the single-muon + ${{p_{\mathrm {T}}} ^\text {miss}}$ object groups (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above each plot indicate the observed $p$-value for the agreement of data and simulation for the corresponding event class.

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Figure 10:
Example ${S_{\mathrm {T}}}$ (upper left) and $M$ (upper right) distributions for the 2$\mu$ exclusive event class, and the ${{p_{\mathrm {T}}} ^\text {miss}}$ distribution for the 2$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $+X inclusive event class (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the region enclosed by red dashed lines in each figure corresponds to the region of interest determined by the RoI algorithm described in Section 5.

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Figure 10-a:
Example ${S_{\mathrm {T}}}$ (upper left) and $M$ (upper right) distributions for the 2$\mu$ exclusive event class, and the ${{p_{\mathrm {T}}} ^\text {miss}}$ distribution for the 2$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $+X inclusive event class (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the region enclosed by red dashed lines in each figure corresponds to the region of interest determined by the RoI algorithm described in Section 5.

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Figure 10-b:
Example ${S_{\mathrm {T}}}$ (upper left) and $M$ (upper right) distributions for the 2$\mu$ exclusive event class, and the ${{p_{\mathrm {T}}} ^\text {miss}}$ distribution for the 2$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $+X inclusive event class (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the region enclosed by red dashed lines in each figure corresponds to the region of interest determined by the RoI algorithm described in Section 5.

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Figure 10-c:
Example ${S_{\mathrm {T}}}$ (upper left) and $M$ (upper right) distributions for the 2$\mu$ exclusive event class, and the ${{p_{\mathrm {T}}} ^\text {miss}}$ distribution for the 2$\mu$+${{p_{\mathrm {T}}} ^\text {miss}} $+X inclusive event class (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the region enclosed by red dashed lines in each figure corresponds to the region of interest determined by the RoI algorithm described in Section 5.

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Figure 11:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 11-a:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 11-b:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 11-c:
Distribution of $\tilde{p}$-values for the RoI scan in exclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 12:
Distribution of $\tilde{p}$-values for the RoI scan in inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 12-a:
Distribution of $\tilde{p}$-values for the RoI scan in inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 12-b:
Distribution of $\tilde{p}$-values for the RoI scan in inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 12-c:
Distribution of $\tilde{p}$-values for the RoI scan in inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 13:
Distribution of $\tilde{p}$-values for the RoI scan in jet-inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 13-a:
Distribution of $\tilde{p}$-values for the RoI scan in jet-inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 13-b:
Distribution of $\tilde{p}$-values for the RoI scan in jet-inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.

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Figure 13-c:
Distribution of $\tilde{p}$-values for the RoI scan in jet-inclusive classes for the $M$ (upper), ${S_{\mathrm {T}}}$ (middle), and ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) distributions.
Tables

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Table 1:
Summary of standard model simulated samples. The generator described in the table corresponds to the matrix element generator.

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Table 2:
Summary of object selection criteria discussed in Section 4.

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Table 3:
Summary of online and offline criteria.

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Table 4:
Summary of systematic uncertainties in the analysis.

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Table 5:
Overview of the two most significant event classes in each RoI scan. Details of the RoI, the expectation from the SM simulation, and the number of data events within the RoI are shown along with the $p$- and $\tilde{p}$-values.
Summary
The Model Unspecific Search in CMS (MUSiC) analysis has been presented. The analysis is based on data recorded by the CMS detector at the LHC during proton-proton collisions at a centre-of-mass energy of 13 TeV in 2016 and corresponding to an integrated luminosity of 35.9 fb$^{-1}$ . The MUSiC analysis searches for anomalies and possible hints of physics beyond the standard model in the data using a model-independent approach, relying solely on the assumptions of the well-tested standard model.

Events from data and simulation containing at least one electron or muon have been sorted into event classes based on their final-state topology, defined by the number of electrons, muons, photons, jets and b-tagged jets, and missing transverse momentum. The event yields were compared between the data and the expectation in a wide range of event classes. The kinematic distributions corresponding to the sum of transverse momenta, invariant (or transverse) mass, and missing transverse momentum in each of the event classes have been scanned using a region of interest algorithm. The algorithm identifies deviations of the data from the simulated standard model predictions, calculating a $p$-value of any observed deviation after correcting for the look-elsewhere effect. A global overview of the results from the different event classes and distributions has been presented.

The sensitivity and robustness of the analysis has been shown in a variety of different studies. No significant deviations from the standard model expectations were found in the data analysed by the MUSiC algorithm. A wide range of final-state topologies has been studied, and there is agreement between data and the standard model simulation given the experimental and theoretical uncertainties. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.
Additional Figures

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Additional Figure 1:
Overview of total event yields for the inclusive event classes of the single-electron (upper) and single-muon (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 1-a:
Overview of total event yields for the inclusive event classes of the single-electron object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 1-b:
Overview of total event yields for the inclusive event classes of the single-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 2:
Overview of total event yields for the inclusive event classes of the double-electron (upper) and the double-muon (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 2-a:
Overview of total event yields for the inclusive event classes of the double-electron object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 2-b:
Overview of total event yields for the inclusive event classes of the double-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 3:
Overview of total event yields for the inclusive event classes of the single-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 3-a:
Overview of total event yields for the inclusive event classes of the single-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 3-b:
Overview of total event yields for the inclusive event classes of the single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 4:
Overview of total event yields for the inclusive event classes of the single-electron $+$ photons (upper) and the single-muon $+$ photons (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 4-a:
Overview of total event yields for the inclusive event classes of the single-electron $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 4-b:
Overview of total event yields for the inclusive event classes of the single-muon $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 5:
Overview of total event yields for the inclusive event classes of the single-electron $+$ single-muon (upper) and the single-electron $+$ single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 5-a:
Overview of total event yields for the inclusive event classes of the single-electron $+$ single-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 5-b:
Overview of total event yields for the inclusive event classes of the single-electron $+$ single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 6:
Overview of total event yields for the inclusive event classes of the double-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the double-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 6-a:
Overview of total event yields for the inclusive event classes of the double-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 6-b:
Overview of total event yields for the inclusive event classes of the double-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 7:
Overview of total event yields for the inclusive event classes of the single-electron $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the single-muon $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 7-a:
Overview of total event yields for the inclusive event classes of the single-electron $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 7-b:
Overview of total event yields for the inclusive event classes of the single-muon $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 8:
Overview of total event yields for the inclusive event classes of the three-lepton object groups with same flavour (upper) and different flavour (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 8-a:
Overview of total event yields for the inclusive event classes of the three-lepton object groups with same flavour. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 8-b:
Overview of total event yields for the inclusive event classes of the three-lepton object groups with different flavour. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 9:
Overview of total event yields for the inclusive event classes of the three-lepton (same flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (upper), and the three-lepton (different flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 9-a:
Overview of total event yields for the inclusive event classes of the three-lepton (same flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 9-b:
Overview of total event yields for the inclusive event classes of the three-lepton (different flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 10:
Overview of total event yields for the inclusive event classes of the ${\geq}$4 leptons object group (upper), and the ${\geq}$4 leptons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 10-a:
Overview of total event yields for the inclusive event classes of the ${\geq}$4 leptons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 10-b:
Overview of total event yields for the inclusive event classes of the ${\geq}$4 leptons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 11:
Overview of total event yields for the inclusive event classes of the $ > $1 lepton $+$ photons object group (upper), and the $ > $1 lepton $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 11-a:
Overview of total event yields for the inclusive event classes of the $ > $1 lepton $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 11-b:
Overview of total event yields for the inclusive event classes of the $ > $1 lepton $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 12:
Overview of total event yields for the jet-inclusive event classes of the single-electron (upper) and single-muon (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 12-a:
Overview of total event yields for the jet-inclusive event classes of the single-electron object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 12-b:
Overview of total event yields for the jet-inclusive event classes of the single-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 13:
Overview of total event yields for the jet-inclusive event classes of the double-electron (upper) and the double-muon (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 13-a:
Overview of total event yields for the jet-inclusive event classes of the double-electron object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 13-b:
Overview of total event yields for the jet-inclusive event classes of the double-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 14:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 14-a:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 14-b:
Overview of total event yields for the jet-inclusive event classes of the single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 15:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ photons (upper) and the single-muon $+$ photons (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 15-a:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

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Additional Figure 15-b:
Overview of total event yields for the jet-inclusive event classes of the single-muon $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 16:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ single-muon (upper) and the single-electron $+$ single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 16-a:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ single-muon object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 16-b:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ single-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 17:
Overview of total event yields for the jet-inclusive event classes of the double-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the double-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 17-a:
Overview of total event yields for the jet-inclusive event classes of the double-electron $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 17-b:
Overview of total event yields for the jet-inclusive event classes of the double-muon $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 18:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (upper) and the single-muon $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ (lower) object groups. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 18-a:
Overview of total event yields for the jet-inclusive event classes of the single-electron $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 18-b:
Overview of total event yields for the jet-inclusive event classes of the single-muon $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 19:
Overview of total event yields for the jet-inclusive event classes of the three-lepton object groups with same flavour (upper) and different flavour (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 19-a:
Overview of total event yields for the jet-inclusive event classes of the three-lepton object groups with same flavour. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 19-b:
Overview of total event yields for the jet-inclusive event classes of the three-lepton object groups with different flavour. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 20:
Overview of total event yields for the jet-inclusive event classes of the three-lepton (same flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (upper), and the three-lepton (different flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 20-a:
Overview of total event yields for the jet-inclusive event classes of the three-lepton (same flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 20-b:
Overview of total event yields for the jet-inclusive event classes of the three-lepton (different flavour) $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 21:
Overview of total event yields for the jet-inclusive event classes of the ${\geq}$4 leptons object group (upper), and the ${\geq}$4 leptons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 21-a:
Overview of total event yields for the jet-inclusive event classes of the ${\geq}$4 leptons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 21-b:
Overview of total event yields for the jet-inclusive event classes of the ${\geq}$4 leptons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 22:
Overview of total event yields for the jet-inclusive event classes of the $ > $1 lepton $+$ photons object group (upper), and the $ > $1 lepton $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group (lower). Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 22-a:
Overview of total event yields for the jet-inclusive event classes of the $ > $1 lepton $+$ photons object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 22-b:
Overview of total event yields for the $ > $1 lepton $+$ photons $+$ ${{p_{\mathrm {T}}} ^\text {miss}}$ object group. Measured data are shown as black markers, contributions from SM processes are represented by coloured histograms, and the shaded region represents the uncertainty in the SM background. The numbers above the plot indicate the observed p-value for the agreement of data and simulation.

png pdf
Additional Figure 23:
The relevant kinematic distributions for the two exclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 3e $+$ 1b $+$ 2 jets event class (left) and the transverse mass distribution for the 1e $+$ 1$ {\mu}$ $+$ 1${\gamma}$ $+$ ${{p_{\mathrm {T}}} ^\text {miss}} $ event class (right) are shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding inclusive and jet-inclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 23-a:
The relevant kinematic distributions for the two exclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 3e $+$ 1b $+$ 2 jets event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding inclusive and jet-inclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 23-b:
The relevant kinematic distributions for the two exclusive event classes with the largest deviation as determinded from the region of interest scan. The transverse mass distribution for the 1e $+$ 1$ {\mu}$ $+$ 1${\gamma}$ $+$ ${{p_{\mathrm {T}}} ^\text {miss}} $ event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding inclusive and jet-inclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 24:
The relevant kinematic distributions for the two inclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 2e $+$ 1$ {\mu}$ $+$ 1b $+$ 5 jets $+$ X event class (left) and the 2$ {\mu}$ $+$ X event class (right) are shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region to the right of the red dashed line is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 24-a:
The relevant kinematic distributions for the two inclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 2e $+$ 1$ {\mu}$ $+$ 1b $+$ 5 jets $+$ X event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region to the right of the red dashed line is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 24-b:
The relevant kinematic distributions for the two inclusive event classes with the largest deviation as determinded from the region of interest scan. The 2$ {\mu}$ $+$ X event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region to the right of the red dashed line is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 25:
The relevant kinematic distributions for the two jet-inclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 2e $+$ 1${\mu}$ $+$ 5 jets $+$ Njets event class (left) and the 2e $+$ 1${\mu}$ $+$ 1b $+$ 3 jets $+$ Njets event class (right) are shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines (or to the right of the red dashed line for the plot with a single line) is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 25-a:
The relevant kinematic distributions for the two jet-inclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 2e $+$ 1${\mu}$ $+$ 5 jets $+$ Njets event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines (or to the right of the red dashed line for the plot with a single line) is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.

png pdf
Additional Figure 25-b:
The relevant kinematic distributions for the two jet-inclusive event classes with the largest deviation as determinded from the region of interest scan. The $\mathrm {S_{T}}$ distribution for the 2e $+$ 1${\mu}$ $+$ 1b $+$ 3 jets $+$ Njets event class is shown. The data events are shown in black and the simulations of the SM processes are shown as coloured histograms. The region enclosed within the red dashed lines (or to the right of the red dashed line for the plot with a single line) is the region of interest and the look-elsewhere-effect corrected $\mathrm {\tilde{p}}$-value is also displayed. For these final states, the flavour counterparts and corresponding exclusive event classes were checked and they did not show a large deviation. The $\mathrm {\tilde{p}}$-value distributions show that observing such deviations is still within the expectations from the SM only hypothesis given the number of event classes scanned.
References
1 CMS Collaboration The CMS experiment at the CERN LHC JINST 3 (2008) S08004 CMS-00-001
2 D0 Collaboration Search for new physics in e$ \mu $x data at D0 using SLEUTH: A quasi-model-independent search strategy for new physics PRD 62 (2000) 092004 hep-ex/0006011
3 D0 Collaboration Quasi-model-independent search for new physics at large transverse momentum PRD 64 (2001) 012004 hep-ex/0011067
4 D0 Collaboration Quasi-model-independent search for new high $ {p}_{T} $ physics at D0 PRL 86 (2001) 3712 hep-ex/0011071
5 CDF Collaboration Model-independent and quasi-model-independent search for new physics at CDF PRD 78 (2008) 012002 0712.1311
6 CDF Collaboration Global search for new physics with 2.0 fb$ ^{-1} $ at CDF PRD 79 (2009) 011101 0809.3781
7 H1 Collaboration A general search for new phenomena in ep scattering at HERA PLB 602 (2004) 14 hep-ex/0408044
8 H1 Collaboration A general search for new phenomena at HERA PLB 674 (2009) 257 0901.0507
9 ATLAS Collaboration A strategy for a general search for new phenomena using data-derived signal regions and its application within the ATLAS experiment EPJC 79 (2019) 120 1807.07447
10 CMS Collaboration Model unspecific search for new physics in pp collisions at $ \sqrt{s}=7 \mathrm{TeV} $ CMS-PAS-EXO-10-021
11 CMS Collaboration MUSiC, a model unspecific search for new physics, in pp collisions at $ \sqrt{s}=8 \mathrm{TeV} $ CMS-PAS-EXO-14-016 CMS-PAS-EXO-14-016
12 CMS Collaboration The CMS trigger system JINST 12 (2017) P01020 CMS-TRG-12-001
1609.02366
13 CMS Collaboration Particle-flow reconstruction and global event description with the CMS detector JINST 12 (2017) P10003 CMS-PRF-14-001
1706.04965
14 M. Cacciari, G. P. Salam, and G. Soyez The anti-$ {k_{\mathrm{T}}} $ jet clustering algorithm JHEP 04 (2008) 063 0802.1189
15 M. Cacciari, G. P. Salam, and G. Soyez FastJet user manual EPJC 72 (2012) 1896 1111.6097
16 CMS Collaboration Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at $ \sqrt{s} = $ 8 ~TeV JINST 10 (2015) P08010 CMS-EGM-14-001
1502.02702
17 CMS Collaboration Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at $ \sqrt{s} = $ 8 TeV JINST 10 (2015) P06005 CMS-EGM-13-001
1502.02701
18 CMS Collaboration Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $ \sqrt{s} = $ 13 TeV JINST 13 (2018) P06015 CMS-MUO-16-001
1804.04528
19 CMS Collaboration Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV JINST 12 (2017) P02014 CMS-JME-13-004
1607.03663
20 CMS Collaboration Jet algorithms performance in 13 TeV data CMS-PAS-JME-16-003 CMS-PAS-JME-16-003
21 CMS Collaboration Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV JINST 13 (2018) P05011 CMS-BTV-16-002
1712.07158
22 CMS Collaboration Performance of missing transverse momentum reconstruction in proton-proton collisions at $ \sqrt{s}= $ 13 TeV using the CMS detector JINST 14 (2019) P07004 CMS-JME-17-001
1903.06078
23 T. Sjostrand et al. An introduction to PYTHIA 8.2 CPC 191 (2015) 159 1410.3012
24 J. Alwall et al. The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations JHEP 07 (2014) 079 1405.0301
25 J. Alwall et al. Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions EPJC 53 (2008) 473 0706.2569
26 R. Frederix and S. Frixione Merging meets matching in MC@NLO JHEP 12 (2012) 061 1209.6215
27 P. Nason A new method for combining NLO QCD with shower Monte Carlo algorithms JHEP 11 (2004) 040 hep-ph/0409146
28 S. Frixione, P. Nason, and C. Oleari Matching NLO QCD computations with parton shower simulations: the POWHEG method JHEP 11 (2007) 070 0709.2092
29 S. Alioli, P. Nason, C. Oleari, and E. Re A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX JHEP 06 (2010) 043 1002.2581
30 S. Alioli, P. Nason, C. Oleari, and E. Re NLO vector-boson production matched with shower in POWHEG JHEP 07 (2008) 060 0805.4802
31 E. Re Single-top Wt-channel production matched with parton showers using the POWHEG method EPJC 71 (2011) 1547 1009.2450
32 S. Alioli, P. Nason, C. Oleari, and E. Re NLO single-top production matched with shower in POWHEG: s- and t-channel contributions JHEP 09 (2009) 111 0907.4076
33 S. Alioli, P. Nason, C. Oleari, and E. Re NLO Higgs boson production via gluon fusion matched with shower in POWHEG JHEP 04 (2009) 002 0812.0578
34 P. Nason and C. Oleari NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG JHEP 02 (2010) 037 0911.5299
35 T. Melia, P. Nason, R. Rontsch, and G. Zanderighi W$ ^+ $W$ ^- $, WZ and ZZ production in the POWHEG BOX JHEP 11 (2011) 078 1107.5051
36 P. Nason and G. Zanderighi W$ ^+ $W$ ^- $, WZ and ZZ production in the POWHEG-BOX-V2 EPJC 74 (2014) 2702 1311.1365
37 J. M. Campbell, R. K. Ellis, P. Nason, and E. Re Top-pair production and decay at NLO matched with parton showers JHEP 04 (2015) 114 1412.1828
38 E. Bagnaschi, G. Degrassi, P. Slavich, and A. Vicini Higgs production via gluon fusion in the POWHEG approach in the SM and in the MSSM JHEP 02 (2012) 088 1111.2854
39 Sherpa Collaboration Event generation with Sherpa 2.2 SciPost Phys. 7 (2019) 034 1905.09127
40 T. Gleisberg et al. Event generation with SHERPA 1.1 JHEP 02 (2009) 007 0811.4622
41 NNPDF Collaboration Parton distributions for the LHC Run II JHEP 04 (2015) 040 1410.8849
42 CMS Collaboration Event generator tunes obtained from underlying event and multiparton scattering measurements EPJC 76 (2016) 155 CMS-GEN-14-001
1512.00815
43 GEANT4 Collaboration GEANT4--a simulation toolkit NIMA 506 (2003) 250
44 Y. Li and F. Petriello Combining QCD and electroweak corrections to dilepton production in FEWZ PRD 86 (2012) 094034 1208.5967
45 S. G. Bondarenko and A. A. Sapronov NLO EW and QCD proton-proton cross section calculations with mcsanc-v1.01 CPC 184 (2013) 2343 1301.3687
46 J. M. Campbell and R. K. Ellis MCFM for the Tevatron and the LHC NPPS 205--206 (2010) 10 1007.3492
47 T. Gehrmann et al. W$ ^+ $W$ ^- $ production at hadron colliders in next to next to leading order QCD PRL 113 (2014) 212001 1408.5243
48 M. Czakon and A. Mitov Top++: A program for the calculation of the top-pair cross-section at hadron colliders CPC 185 (2014) 2930 1112.5675
49 M. Aliev et al. HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR CPC 182 (2011) 1034 1007.1327
50 P. Kant et al. HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions CPC 191 (2015) 74 1406.4403
51 LHC Higgs Cross Section Working Group Handbook of LHC Higgs cross sections: 4. deciphering the nature of the Higgs sector CERN (2016) 1610.07922
52 CMS Collaboration Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $ \sqrt{s} = $ 13 TeV JINST 15 (2020) P02027 CMS-MUO-17-001
1912.03516
53 CMS Collaboration Search for high-mass resonances in dilepton final states in proton-proton collisions at $ \sqrt{s}= $ 13 TeV JHEP 06 (2018) 120 CMS-EXO-16-047
1803.06292
54 J. Butterworth et al. PDF4LHC recommendations for LHC Run II JPG 43 (2016) 023001 1510.03865
55 CMS Collaboration CMS luminosity measurements for the 2016 data taking period CMS-PAS-LUM-17-001 CMS-PAS-LUM-17-001
56 G. Altarelli, B. Mele, and M. Ruiz-Altaba Searching for new heavy vector bosons in $ p \bar{p} $ colliders Z. Phys. C 45 (1989) 109, .[Erratum: \DOI10.1007/BF01552335]
57 CMS Collaboration Search for high-mass resonances in final states with a lepton and missing transverse momentum at $ \sqrt{s}= $ 13 TeV JHEP 06 (2018) 128 CMS-EXO-16-033
1803.11133
58 G. 't Hooft Symmetry breaking through Bell-Jackiw anomalies PRL 37 (1976) 8
59 F. R. Klinkhamer and N. S. Manton A saddle-point solution in the Weinberg-Salam theory PRD 30 (1984) 2212
60 A. Ringwald High-energy breakdown of perturbation theory in the electroweak instanton sector NPB 330 (1990) 1
61 J. Ellis and K. Sakurai Search for sphalerons in proton-proton collisions JHEP 04 (2016) 086 1601.03654
62 M. Trodden Electroweak baryogenesis Rev. Mod. Phys. 71 (1999) 1463 hep-ph/9803479
63 CMS Collaboration Search for black holes and sphalerons in high-multiplicity final states in proton-proton collisions at $ \sqrt{s}= $ 13 TeV JHEP 11 (2018) 042 CMS-EXO-17-023
1805.06013
64 C. Bravo and J. Hauser BaryoGEN, a Monte Carlo generator for sphaleron-like transitions in proton-proton collisions JHEP 11 (2018) 041 1805.02786
65 H.-L. Lai et al. New parton distributions for collider physics PRD 82 (2010) 074024 1007.2241
66 CMS Collaboration Search for Z$ \gamma $ resonances using leptonic and hadronic final states in proton-proton collisions at $ \sqrt{s}= $ 13 TeV JHEP 09 (2018) 148 CMS-EXO-17-005
1712.03143
Compact Muon Solenoid
LHC, CERN