CERN Accelerating science

noimg: The predicted and observed yields for the preselected sample for all channels. Both statistical and systematic uncertainties are included.: The predicted and observed yields in the control samples for the electron final states. Top refers to both single top and $\ttbar$ events. Both statistical and systematic uncertainties are included.: The predicted and observed yields in the control samples for the muon final states. Top refers to both single top and $\ttbar$ events. Both statistical and systematic uncertainties are included.

$\stl$ distributions for the $\eejj$ (top) and the $\mmjj$ final states (middle) in the Z control region. The bottom figure shows the $\stl$ distribution for the dilepton $\ttbar$ control region. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band shows the combined statistical and systematic uncertainties on the prediction in each bin.

$\stl$ distributions for the $\eejj$ (top) and the $\mmjj$ final states (middle) in the Z control region. The bottom figure shows the $\stl$ distribution for the dilepton $\ttbar$ control region. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band shows the combined statistical and systematic uncertainties on the prediction in each bin.

$\stl$ distributions for the $\eejj$ (top) and the $\mmjj$ final states (middle) in the Z control region. The bottom figure shows the $\stl$ distribution for the dilepton $\ttbar$ control region. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band shows the combined statistical and systematic uncertainties on the prediction in each bin.

Reconstructed $\mlq$ distributions for the $\enjj$ (top) and the $\mnjj$ (bottom) final states in the $W+2$~jets (left) and $\ttbar$ (right) control regions. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band indicates the combined statistical and systematic uncertainties on the prediction in each bin.

Reconstructed $\mlq$ distributions for the $\enjj$ (top) and the $\mnjj$ (bottom) final states in the $W+2$~jets (left) and $\ttbar$ (right) control regions. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band indicates the combined statistical and systematic uncertainties on the prediction in each bin.

Reconstructed $\mlq$ distributions for the $\enjj$ (top) and the $\mnjj$ (bottom) final states in the $W+2$~jets (left) and $\ttbar$ (right) control regions. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band indicates the combined statistical and systematic uncertainties on the prediction in each bin.

Reconstructed $\mlq$ distributions for the $\enjj$ (top) and the $\mnjj$ (bottom) final states in the $W+2$~jets (left) and $\ttbar$ (right) control regions. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The QCD background is estimated from data, while the other background contributions are obtained from simulated samples. The top background includes both $\ttbar$ and single top events. The expected contribution from a potential LQ signal is negligible and is not included in the figure. The MC uncertainty band indicates the combined statistical and systematic uncertainties on the prediction in each bin.

$\stl$ distribution for the $eejj$ (left) and the $\mmjj$ final states (right) after all selections. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The expected LQ signals for various masses are also shown.

$\stl$ distribution for the $eejj$ (left) and the $\mmjj$ final states (right) after all selections. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The expected LQ signals for various masses are also shown.

$\mlq$ distribution for the $\enjj$ (left) and the $\mnjj$ final state (right) after all selections. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The expected LQ signals for various masses are also shown.

$\mlq$ distribution for the $\enjj$ (left) and the $\mnjj$ final state (right) after all selections. The data are indicated by the points and the Standard Model backgrounds are shown with cumulative distributions. The expected LQ signals for various masses are also shown.

95\% CL upper bounds on the LQ pair production cross sections as a function of LQ mass for the combination of the $\eejj$ and the $\enjj$ channels (top), and for the $\mmjj$ and the $\mnjj$ channels (bottom). The figures on the left (right) show the limit for $\beta=$1.0 (0.5). The expected limit is indicated by the dashed line. The light yellow (dark green) solid band contains 68\% (95\%) of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematics uncertainties are included. The observed limit is indicated by the solid line. The theory prediction is indicated by the dotted line, which includes systematic uncertainties due to the choice of the PDF and to the renormalization and factorization scales ($\Delta\sigma_\mu$).

95\% CL upper bounds on the LQ pair production cross sections as a function of LQ mass for the combination of the $\eejj$ and the $\enjj$ channels (top), and for the $\mmjj$ and the $\mnjj$ channels (bottom). The figures on the left (right) show the limit for $\beta=$1.0 (0.5). The expected limit is indicated by the dashed line. The light yellow (dark green) solid band contains 68\% (95\%) of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematics uncertainties are included. The observed limit is indicated by the solid line. The theory prediction is indicated by the dotted line, which includes systematic uncertainties due to the choice of the PDF and to the renormalization and factorization scales ($\Delta\sigma_\mu$).

95\% CL upper bounds on the LQ pair production cross sections as a function of LQ mass for the combination of the $\eejj$ and the $\enjj$ channels (top), and for the $\mmjj$ and the $\mnjj$ channels (bottom). The figures on the left (right) show the limit for $\beta=$1.0 (0.5). The expected limit is indicated by the dashed line. The light yellow (dark green) solid band contains 68\% (95\%) of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematics uncertainties are included. The observed limit is indicated by the solid line. The theory prediction is indicated by the dotted line, which includes systematic uncertainties due to the choice of the PDF and to the renormalization and factorization scales ($\Delta\sigma_\mu$).

95\% CL upper bounds on the LQ pair production cross sections as a function of LQ mass for the combination of the $\eejj$ and the $\enjj$ channels (top), and for the $\mmjj$ and the $\mnjj$ channels (bottom). The figures on the left (right) show the limit for $\beta=$1.0 (0.5). The expected limit is indicated by the dashed line. The light yellow (dark green) solid band contains 68\% (95\%) of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematics uncertainties are included. The observed limit is indicated by the solid line. The theory prediction is indicated by the dotted line, which includes systematic uncertainties due to the choice of the PDF and to the renormalization and factorization scales ($\Delta\sigma_\mu$).

95\% CL exclusion region obtained from the combination of the two electron channels (left) and the muon channels (right) shown in the $\beta$ versus leptoquark mass plane. The gray area indicates the D0 exclusion limit~\cite{results_first_gen_limit_d0,results_second_gen_limit_d0}, and the thick dotted line the CMS exclusion~\cite{results_first_gen_limit_cms,results_second_gen_limit_cms}. The dotted and dotted-dashed lines show the individual limits for the $\lljj$ and the $\lnjj$ channels, respectively. The combined expected limit is indicated by the thick dashed line. The solid band contains 68\% of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematic uncertainties are included. The combined observed limit is indicated by the solid line.

95\% CL exclusion region obtained from the combination of the two electron channels (left) and the muon channels (right) shown in the $\beta$ versus leptoquark mass plane. The gray area indicates the D0 exclusion limit~\cite{results_first_gen_limit_d0,results_second_gen_limit_d0}, and the thick dotted line the CMS exclusion~\cite{results_first_gen_limit_cms,results_second_gen_limit_cms}. The dotted and dotted-dashed lines show the individual limits for the $\lljj$ and the $\lnjj$ channels, respectively. The combined expected limit is indicated by the thick dashed line. The solid band contains 68\% of possible outcomes from pseudo-experiments in which the yield is Poisson-fluctuated around the background-only expectation. Systematic uncertainties are included. The combined observed limit is indicated by the solid line.