Table 2.
Event yields for the Lepton Spectrum method for H T≥500 GeV. The upper part of the table gives the background predictions that are based on simulated (MC) event samples and the yield for the SUSY signal points LM3 and LM6. The lower part gives the backgrounds predicted using control samples in the data (data-driven prediction). The actual yield observed in data is given at the bottom, with the separate muon and electron yields given in parentheses (N μ,N e) after the total yield. The uncertainties on the background predictions are statistical and systematic. The MC yields are not used in setting limits and are included only for reference. The uncertainties on the MC yields are statistical only
 range [GeV] |
[250, 350) | [350, 450) | [450, 550) | ≥550 |
|---|---|---|---|---|
| MC yields | ||||
| 1 ℓ | 146.7±2.1 | 34.8±1.1 | 8.5±0.6 | 2.9±0.3 |
| Dilepton | 19.9±0.5 | 3.8±0.2 | 0.7±0.1 | 0.3±0.1 |
| 1 τ | 30.6±0.9 | 7.9±0.5 | 2.1±0.3 | 0.8±0.2 |
| Z+jets | 1.3±0.8 | <0.1 | <0.1 | <0.1 |
| Total (MC) | 198.6±2.5 | 46.5±1.2 | 11.3±0.6 | 4.0±0.4 |
| SUSY LM3 (MC) | 266.3±3.7 | 91.0±2.2 | 23.3±1.1 | 9.9±0.7 |
| SUSY LM6 (MC) | 23.4±0.3 | 20.0±0.3 | 13.4±0.2 | 10.8±0.2 |
| Data-driven prediction | ||||
| 1 ℓ | 109±13±18 | 32.0±7.5±5.8 | 3.9±2.7±1.2 | 3.1±2.3±1.0 |
| Dilepton | 15.8±1.9±1.8 | 3.0±0.9±0.5 | 0.5±0.3±0.2 | 0.1±0.2±0.2 |
| 1 τ | 33.0±1.8±1.7 | 8.9±1.0±0.5 | 2.1±0.5±0.2 | 1.1±0.3±0.2 |
| QCD | 0.0±1.0±1.2 | 0.0±1.0±1.2 | 0.0±1.0±1.2 | 0.0±1.0±1.2 |
| Z+jets (MC) | 1.3±0.8±1.3 | <0.1 | <0.1 | <0.1 |
| Total (predicted) | 159±14±18 | 44.0±7.7±6.0 | 6.6±2.9±1.7 | 4.3±2.6±1.6 |
| Data (observed) | 163 (84,79) | 46 (21,25) | 9 (8,1) | 2 (1,1) |