A search for new physics is performed in events with two same-sign isolated leptons, hadronic jets, and missing transverse energy in the final state. The analysis is based on a data sample corresponding to an integrated luminosity of 4.98 inverse femtobarns produced in pp collisions at a center-of-mass energy of 7
collected by the CMS experiment at the LHC. This constitutes a factor of 140 increase in integrated luminosity over previously published results. The observed yields agree with the standard model predictions and thus no evidence for new physics is found. The observations are used to set upper limits on possible new physics contributions and to constrain supersymmetric models. To facilitate the interpretation of the data in a broader range of new physics scenarios, information on the event selection, detector response, and efficiencies is provided.
Figure |
Abbreviated Caption |
|
Figure 1 : Exclusion contour (95% C.L.) in m( g)-m(χ0 ) plane for simplified model pp -> gluino gluino; gluino -> 2 q tau nu chi10 |
|
Figure 2 : Tight-to-loose ratios using method for the non-prompt lepton control region for electrons |
|
Figure 3 : Tight-to-loose ratios using method for the non-prompt lepton control region for electrons |
|
Figure 4 : Tight-to-loose ratios using method for the non-prompt lepton control region for muons |
|
Figure 5 : Tight-to-loose ratios using method for the non-prompt lepton control region for muons |
|
Figure 6 : Tight-to-loose ratios using method for leptons from Z decays in the prompt lepton control region, for electrons, as a function of their transverse momenta |
|
Figure 7 : Tight-to-loose ratios using method for leptons from Z decays in the prompt lepton control region, for muons, as a function of their transverse momenta |
|
Figure 8 : Predicted and observed event yields as a function of HT for high pT leptons |
|
Figure 9 : Predicted and observed event yields as a function of HT for high pT leptons |
|
Figure 10 : Predicted and observed event yields as a function of MET for high pT leptons |
|
Figure 11 : Predicted and observed event yields as a function of MET for high pT leptons |
|
Figure 12 : Comparison of predicted and observed yields in the baseline selection of HT > 80 GeV, MET > 30 GeV for high pT leptons |
|
Figure 13 : Comparison of predicted and observed yields in the baseline selection of HT > 80 GeV, MET > 120 GeV for high pT leptons |
|
Figure 14 : Comparison of predicted and observed yields in the baseline selection of HT > 450 GeV, MET > 0 GeV for high pT leptons |
|
Figure 15 : Comparison of predicted and observed yields in the baseline selection of HT > 450 GeV, MET > 50 GeV for high pT leptons |
|
Figure 16 : Comparison of predicted and observed yields in the baseline selection of HT > 450 GeV, MET > 120 GeV for high pT leptons |
|
Figure 17 : Charge misreconstruction probability for electrons projected on eta measured in simulated events |
|
Figure 18 : Lepton selection efficiency as a function of pT , estimated in simulation for the LM6 SUSY benchmark point and corrected for simulation-to-data scale factors, for electrons and muons |
|
Figure 19 : Lepton selection efficiency as a function of pT , estimated in simulation for the LM6 SUSY benchmark point and corrected for simulation-to-data scale factors, for taus |
|
Figure 20 : Efficiency for an event to pass a given reconstructed MET threshold as a function of generator level MET |
|
Figure 21 : Efficiency for an event to pass a given reconstructed HT threshold as a function of generator level HT |
|
Figure 22 : Efficiency of the isolation requirement as a function of the cut value in electron muon final state |
|
Figure 23 : Efficiency of the isolation requirement as a function of the cut value in di-electron final state |
|
Figure 24 : Efficiency of the isolation requirement as a function of the cut value in di-muon final state |
|
Figure 25 : Efficiency of the isolation requirement (< 0.15) as a function of the cut value on MET for muons (red) and electrons (blue) |
|
Figure 26 : Isolation templates for electrons used for the prediction of single-fake lepton backgrounds in the Btag-and-Probe method |
|
Figure 27 : Isolation templates for muons used for the prediction of single-fake lepton backgrounds in the Btag-and-Probe method |
|
Figure 28 : Comparison of predicted and observed yields in the baseline selection of HT > 80 GeV, MET > 30 GeV for high pT leptons |
|
Figure 29 : Comparison of predicted and observed yields in the baseline selection of HT > 200 GeV, MET > 30 GeV for low pT leptons |