| Efficiency calculations from the Z-sample | Trigger: | 99.5% | +- 0.5% | |||||
| Fraction of the events in each subdetector | Dielectron efficiency from Z | |||||||
| CC-CC | 74% | +- | 3% | |||||
| Sample | CC-CC | CC-EC | EC-EC | CC-EC | 66% | +- | 4% | |
| LQ160, PJET | 81.5% | 17.2% | 1.3% | EC-EC | 68% | +- | 9% | |
| LQ160, PJET, all cuts | 88.8% | 10.5% | 0.7% | |||||
| LQ160, mixture | 81.6% | 17.3% | 1.1% | Efficiency | With trigger | |||
| LQ160, all cuts | 89.4% | 10.6% | 0.0% | 73.4% | 73.0% | |||
| LQ180, PJET | 81.2% | 17.5% | 1.3% | |||||
| LQ180, PJET, all cuts | 85.8% | 13.7% | 0.5% | |||||
| LQ180, mixture | 81.5% | 17.1% | 1.4% | Efficiency | With trigger | |||
| LQ180, all cuts | 86.3% | 13.1% | 0.6% | 73.1% | 72.8% | |||
| LQ200, PJET | 81.2% | 17.7% | 1.1% | |||||
| LQ200, PJET, all cuts | 84.9% | 14.5% | 0.6% | |||||
| LQ200, mixture | 81.2% | 17.7% | 1.1% | Efficiency | With trigger | |||
| LQ200, all cuts | 85.1% | 14.1% | 0.8% | 73.0% | 72.7% | |||
| LQ220, PJET | 80.3% | 18.4% | 1.3% | |||||
| LQ220, PJET, all cuts | 81.7% | 17.4% | 0.9% | |||||
| LQ220, mixture | 80.6% | 18.1% | 1.3% | Efficiency | With trigger | |||
| LQ220, all cuts | 82.5% | 16.6% | 0.9% | 72.8% | 72.5% | |||
| LQ250, PJET | 81.9% | 17.2% | 0.9% | |||||
| LQ250, PJET, all cuts | 81.8% | 17.4% | 0.8% | |||||
| LQ250, mixture | 81.5% | 17.6% | 0.9% | Efficiency | With trigger | |||
| LQ250, all cuts | 81.6% | 17.5% | 0.9% | 72.7% | 72.4% | |||
| Use: | 73% | +- 4% | ||||||
| Efficiency from Z+2j events | ||||||||
| No Hot Cells | ||||||||
| Cut | Total, Z | Nee | Neg | Ngg | N CC-CC | N CC-EC | N EC-EC | |
| No quality cuts | 393.25 | 205.5 | 182.75 | 4 | 212.25 | 152.5 | 28.5 | |
| All quality cuts | 277.75 | 137.5 | 139.25 | 5.25 | 157.5 | 101 | 19.25 | |
| Efficiency per 2 EM | 70.6% | 66.9% | 76.2% | 74.2% | 66.2% | 67.5% | ||
| Statistical error | 2.3% | 3.3% | 3.2% | 3.0% | 3.8% | 8.8% | ||
| eps_e(CC) = | 0.87 | +-0.02 | ||||||
| eps_e(EC) = | 0.68 | +-0.03 | ||||||
| eps_t(CC) = | 0.70 | +-0.03 | ||||||
| eps_t(EC) = | 0.80 | +-0.05 | ||||||
| eps_g(CC) = | 0.91 | +-0.02 | ||||||
| eps_g(EC) = | 0.80 | +-0.03 | ||||||
| Before ID cuts | Nee | Neg | Ngg | Total | ||||
| CC-CC | 100.0 | 98.8 | 13.5 | 212.3 | ||||
| CC-EC | 84.5 | 76.8 | - | 161.3 | ||||
| EC-EC | 21.0 | 7.3 | - | 28.3 | ||||
| After ID cuts | Nee | Neg | Ngg | Total | ||||
| CC-CC | 75.5 | 82.0 | 16.3 | 173.8 | ||||
| CC-EC | 50.8 | 50.3 | 8.5 | 109.5 | ||||
| EC-EC | 11.3 | 7.0 | - | 18.3 | ||||
| Before ID cuts, expctd | Nee | Neg | Ngg | Total | ||||
| CC-CC | 104.0 | 89.1 | 19.1 | 212.3 | ||||
| CC-EC | 85.4 | 58.0 | 9.2 | 152.5 | ||||
| EC-EC | 18.2 | 9.1 | 1.1 | 28.5 | ||||
| After ID cuts, expctd | Nee | Neg | Ngg | Total | ||||
| CC-CC | 78.7 | 70.6 | 15.8 | 165.1 | ||||
| CC-EC | 50.5 | 37.5 | 6.7 | 94.7 | ||||
| EC-EC | 8.4 | 5.0 | 0.7 | 14.1 |
Last Update: 5/22/97
Name: Greg Landsberg
Email: Landsberg@fnald0.fnal.gov