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2010.04.09 BFC and Pythia QA: 10% gain shift

Updated on Fri, 2010-04-09 04:44. Originally created by seluzhen on 2010-04-09 04:43.

See this post from Alice for QCD sample rates

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 2.6 mClusterThreshold 3.6 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 = 3.4 GeV
StChain:INFO - Init() : Cluster eT threshold = 4.5 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 0.00646 0.09532 0.00656
pt=3-4 0.03042 0.2401 0.02772
pt=4-6 0.09438 0.42552 0.07568
pt=6-9 0.165984 0.54004 0.149137
pt=9-15 0.167329 0.559137 0.162972
pt=15-25 0.12486 0.45662 0.11744
pt=25-35 0.0562525 0.269499 0.0536273

Figure 2: False rejection (Y-axis scale is 10^-3)

False reject: fract. of generated events
GammaJet
pt bin Bfc Filter Pythia Filter L2gamma Trigger
pt=2-3 6e-05 0 0
pt=3-4 0.00016 6e-05 0
pt=4-6 0.0003 8e-05 0
pt=6-9 0.000261044 6.0241e-05 0
pt=9-15 0.000220884 6.0241e-05 0
pt=15-25 0.00028 0.00012 0
pt=25-35 0.000280561 0.000140281 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 0.0677717 1 0.0612673
pt=3-4 0.126697 1 0.105623
pt=4-6 0.221799 1 0.16991
pt=6-9 0.307318 1 0.26809
pt=9-15 0.299264 1 0.281882
pt=15-25 0.273444 1 0.244317
pt=25-35 0.20873 1 0.181217

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 0.000629459 0 0
pt=3-4 0.000416493 0 0
pt=4-6 0.000517014 0 0
pt=6-9 0.00037183 0 0
pt=9-15 0.000287305 0 0
pt=15-25 0.000350401 0 0
pt=25-35 0.000520524 0 0
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