This is a first attempt at comparing the performance of the CAL shower shape analysis between pass7 and pass8.
The file used for the work are:
For Pass7:
AG-GR-v17r31-StdCuts-merit.root
BKG-GR-v17r31-StdCuts-merit.root
where StdCuts are: FswGamState == 0&& CalEnergyRaw> 5&& TkrNumTracks> 0&& CalCsIRLn> 4.
For Pass8:
AG-GR-v20r3p4-OVL
BKG-GR-v20r3p4-OVL
I include the following precuts to the allGamma sample for both Pass7 and Pass8:
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FswGamState==0 && TkrNumTracks > 0 && (CalEnergyRaw > 5 && CalCsIRLn > 4) && CTBCPFGamProb>0 |
note for Pass8 CalEnergyRaw is substutited by CalUberEnergy and I have added the cut on CTBCPFGamProb because it is necessary that the sample of events pass the
Cpf selection before I can compare the Pass7 and Pass8 selection in the CAL.
To the BKG sample I include in addition to the above selection the condition that there not be gamma's in the sample, i.e. a cut on
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McSourceId != 7000 |
The selection conditions assigned to each node are defined below, note that all the CTB variables have been redefined based on their definition found in the workbook.
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veto BackSeal: ((Cal67Sum - 66.)/33.5)^2 + ((Cal67Diff + .4)/7.2)^2 < 1.2 & CalLLRms < 30 |
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veto LowE: CalEdgeEnergy>0 & CalEdgeEnergyRatio > (LogCalEnergyRaw -.5)/2. |
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filter VTXSplit: VtxAngle > 0 |
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veto VtxSideSeal: (CalDeltaEdgeEnergy < .6 & CalDeltaEdgeEnergy < 6/CalEdgeEnergy & CalEdgeEnergy < 190) |
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veto Vtx: (CTBTkrCoreCalDoca<32.3 | (CTBTkrCoreCalDoca<152 & XtalRmsTkrCoreDoca<-10)) & XtalRmsTkrCoreDoca < (2- .15*CTBTkrCoreCalDoca) & Tkr1CoreHC > 0 |
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filter notVTXSplit: VtxAngle == 0 |
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veto TkrSideSeal: (CalDeltaEdgeEnergy < .75 | (CalDeltaEdgeEnergy < .95 - (30./(CalEdgeEnergy+20))^2 & CalEdgeEnergy < 300)) & CalDeltaEdgeEnergy < (1.1 - CalEdgeEnergy/200) |
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filter nTkrFront: TkrNumTracks > 1 && Tkr1FirstLayer < 5 &&(CTBTkrCoreCalDoca<40.56 | (CalXtalRatio<0.105 & EvtECalTransRms<3.45)) |
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filter nTkrBack: "TkrNumTracks > 1 && Tkr1FirstLayer > 5 && ((CTBTkrSHRCalAngle>0.142 && CTBTkrCoreCalDoca<16.7) | (CTBTkrSHRCalAngle<0.142 & XtalRmsTkrCoreDoca<-15.4)) |
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filter 1TkrFront: (TkrNumTracks == 1) && Tkr1FirstLayer < 5 && (EvtECalTrackDoca < 2.13 || CTBTkrEnergyFrac > 0.285) |
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filter 1TkrBack: (TkrNumTracks == 1) && Tkr1FirstLayer > 5 && !(XtalRmsTkrCoreDoca > -3 && CalTrkXtalRmsE > 12) |
Below are some plots on the sequential selection efficiency for each node in the CAL worksheet, I apologize for the low contrast yellow line in the plots!
| Pass7 (AG vs BKG) | Pass8-v20r3p4 (AG vs BKG) |
|---|---|---|
TkrSideSeal1TkrFront | | |
TkrSideSeal1TkrBack | | |
TkrSideSealnTkrFront | | |
TkrSideSealnTkrBack node | | |
VtxSideSeal | | |
VtxAngle issue
The number of vertexed events (VtxAngel >0) is roughly a factor of 10 less in Pass8. The issue is that the extraction of tracks from trees does not result in 2 tracks which vertex very often, Tracy has been working on this. Below is the comparison of VtxAngle for Pass7 (v17r31), v19r4p1gr14, and v20r3p4 which shows the difference in this variable between the three passes.
From the cut efficiency plots it also looks like there is a lower efficiency for the nTrack branch in pass8 w.r.t pass7, so I took a look the TkrNumTracks variable and indeed there are less events with more than 1 track in pass8:
