2010.04.17 BFC and Pythia QA: 10% gain shift: lowered thresholds
See this post from Alice for QCD sample rates with slightly lower thresholds
QCD and gamma-jet data samples are described here (filter parameters are listed below)
Pythia filter configuration
StEemcGammaFilter:: running the TEST mode (accepting all events). Set mFilterMode=1 to actually reject events
StEemcGammaFilter:: mConeRadius 0.22 mSeedThreshold 2.4 mClusterThreshold 3.3 mEtaLow 0.95 mEtaHigh 2.1 mMaxVertex 120
StEemcGammaFilter:: mCalDepth 279.5 mMinPartEnergy 1e-05 mHadronScale 1 mFilterMode 0 mPrintLevel 1
BFC filter configuration
StChain:INFO - Init() : Using gamma filter on the EEMC
StChain:INFO - Init() : EEMC Sampling Fraction = 0.05
StChain:INFO - Init() : Seed energy threshold = 2.8 GeV
StChain:INFO - Init() : Cluster eT threshold = 3.8 GeV
StChain:INFO - Init() : Maximum vertex = +/- 120 cm
StChain:INFO - Init() : Running the TEST mode (accepting all events). Set mFilterMode=1 to actually reject events in BFC
StEEmcSlowMaker
BFC:INFO - setTowerGainSpread(): gain spread: 0; gain mean value: 1.1
Accept/Reject relative to the total number of Pythia generated events
Figure 1: Fraction of accepted events
| Accept rate: fract. of generated events | |||
| GammaJet | |||
| pt bin | Bfc Filter | Pythia Filter | L2gamma Trigger |
| pt=2-3 | 0.01732 | 0.1343 | 0.00628 |
| pt=3-4 | 0.05818 | 0.3001 | 0.0261 |
| pt=4-6 | 0.1317 | 0.46492 | 0.07864 |
| pt=6-9 | 0.17804 | 0.56314 | 0.15092 |
| pt=9-15 | 0.17226 | 0.57516 | 0.15964 |
| pt=15-25 | 0.13356 | 0.46894 | 0.1179 |
| pt=25-35 | 0.062 | 0.28546 | 0.05482 |
Figure 2: False rejection (Y-axis scale is 10^-3)
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| False reject: fract. of generated events | |||
| GammaJet | |||
| pt bin | Bfc Filter | Pythia Filter | L2gamma Trigger |
| pt=2-3 | 2e-05 | 2e-05 | 0 |
| pt=3-4 | 6e-05 | 6e-05 | 0 |
| pt=4-6 | 6e-05 | 4e-05 | 0 |
| pt=6-9 | 0.0001 | 6e-05 | 0 |
| pt=9-15 | 2e-05 | 2e-05 | 0 |
| pt=15-25 | 2e-05 | 0 | 0 |
| pt=25-35 | 2e-05 | 2e-05 | 0 |
Accept/Reject relative to the number of Pythia filter accepted events
Figure 3: Fraction of accepted events relative to Pythia filter accepted events
| Accept rate: fract. of Pythia-filtered events | |||
| GammaJet | |||
| pt bin | Bfc Filter | Pythia Filter | L2gamma Trigger |
| pt=2-3 | 0.128816 | 1 | 0.0415488 |
| pt=3-4 | 0.193735 | 1 | 0.0808397 |
| pt=4-6 | 0.283232 | 1 | 0.161877 |
| pt=6-9 | 0.316049 | 1 | 0.260291 |
| pt=9-15 | 0.29943 | 1 | 0.26876 |
| pt=15-25 | 0.284813 | 1 | 0.240415 |
| pt=25-35 | 0.217053 | 1 | 0.175156 |
Figure 4: False rejection relative to Pythia filter accepted events
| False reject: fract. of Pythia-filtered events | |||
| GammaJet | |||
| pt bin | Bfc Filter | Pythia Filter | L2gamma Trigger |
| pt=2-3 | 0 | 0 | 0 |
| pt=3-4 | 0 | 0 | 0 |
| pt=4-6 | 4.30182e-05 | 0 | 0 |
| pt=6-9 | 7.10303e-05 | 0 | 0 |
| pt=9-15 | 0 | 0 | 0 |
| pt=15-25 | 4.26494e-05 | 0 | 0 |
| pt=25-35 | 0 | 0 | 0 |