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Track based correction improves upon muon-only correction by factor 1.79. | ||||||||
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After performing this, several deficiencies in our implementation were made apparent. I have not been checking to see if outerEta and outerPhi are valid (i.e. are well defined and not default -999). Also, I have been ignoring tracks that do not pass quality cuts! This could be hurting us significantly. | ||||||||
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Z->munu run | |||||||||||
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> > |
Combined ResultsPutting the two runs together we derive the following signal to background results.
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> > | Pass Five
Z->mumu run
Z->munu run | ||||||||||
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Z->munu run
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< < | Track based correction improves upon muon-only correction by factor 1.79. | ||||||||
> > | Track based correction trails the muon-only correction by factor 0.94.
Combined ResultsPutting the two runs together we derive the following signal to background results.
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hoe_cuts on Z->ee | |||||||||||||
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< < | We will now implement the same set of hoe_cuts on a Z->ee sample and use the above results for Z->mumu to do a signal to background comparison between them. | ||||||||||||
> > | We will now implement the same set of hoe_cuts on a Z->ee sample and use the above results for Z->mumu to do a signal to background comparison between them. Below is an overlay plot of the raw MET, MET corrected for muons, and three different implementations of the MET corrections with hoe cuts of 0.03, 0.05, 0.10. The code used can be found at data/rf1zee.h and data/rf1zee.C. The ntuple run on was data/standalone_zee.root and the output at data/rf1zee.root. | ||||||||||||
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RF Implementation | |||||||||||||
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< < | few comments:
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> > | Pass Four
Z->mumu run
Z->munu run
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> > | Comparing the two response functions (muons in red, RF1 in magneta, RF2 in cyan):
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few comments:
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Track Based Correction | ||||||||
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We will now implement the same set of hoe_cuts on a Z->ee sample and use the above results for Z->mumu to do a signal to background comparison between them. | ||||||||
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RF Implementation
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< < | So, it appears that removing electrons had little effect on the MET distribution - the number of events in the tail is not statistically different. | |||||||
> > | So, it appears that removing electrons had little effect on the MET distribution - the number of events in the tail is not statistically different. If we compare the three corrections overlayed :
hoe_cuts on Z->ee | |||||||
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> > | We will now implement the same set of hoe_cuts on a Z->ee sample and use the above results for Z->mumu to do a signal to background comparison between them. | |||||||
few comments:
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So, it appears that removing electrons had little effect on the MET distribution - the number of events in the tail is not statistically different. | ||||||||
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Ratio of hadronic energy to electromagnetic energy for reco::GsfPixelMatchedElectronCollection. | |||||||||||||||||||||||||
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hoe_cut = 0.03
hoe_cut = 0.05
hoe_cut = 0.10
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> > | Electron Implementation
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Notes
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Quality Cuts | ||||||||
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Results | ||||||||
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Pass Three
Muon Implementation
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< < | Quality factor refers to the ratio of the number of events with MET > x between two different samples. Here, the numerator is the corrected MET with pt cut of 1 GeV while the denominator is MET corrected for muons only. | |||||||
> > | Quality factor refers to the ratio of the number of events with MET > x between two different samples. Here, the denominator is the corrected MET with pt cut of 1 GeV while the numerator is MET corrected for muons only. | |||||||
Implementation Two | ||||||||
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< < | Quality factor refers to the ratio of the number of events with MET > x between two different samples. Here, the numerator is the corrected MET with pt cut of 1 GeV while the denominator is MET corrected for muons only. | |||||||
> > | Quality factor refers to the ratio of the number of events with MET > x between two different samples. Here, the denominator is the corrected MET with pt cut of 1 GeV while the numerator is MET corrected for muons only. | |||||||
As we can see, there are not significant differences between the two implementations expect for the 5 GeV pt cutoff which is expected since this would lead to ignoring a large number of tracks in the first implementation. As a result, for future passes, only the 1 GeV cut in the second implementation will be used. | ||||||||
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Significant shift in bulk of distribution between raw MET and MET corrected for muons. This is expected given the physics involved. Little change after applying response function. This is reasonable since most of the events are in the 0-jet bin (will discuss more below). | ||||||||
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-- FrankGolf - 23 Jun 2008 This is a collection of notes summarizing my MET study. | |||||||||||||||
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Projects: | |||||||||||||||
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< < | NOTES | ||||||||||||||
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< < | VARIABLES | ||||||||||||||
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Black line is raw MET. After muons are corrected (red line), we see distribution shift left and events migrate from tail to bulk. Further morphing occurs as track based correction is applied (eg. Blue line, 1 GeV pt cutoff). | |||||||||||||||
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Cleaner version of the above plot showing raw MET (black), MET corrected for muons only (red), and (blue) MET corrected for tracks w/ pt > 1, no correction below cut. Illustrates more clearly the improvement after each stage. | |||||||||||||||
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Fraction of events with MET < x. This gives further confirmation of the interpretation above. At each stage, more events more into the bulk of the distribution so that a larger fraction of events are found at low x in the corrected sample compared to the uncorrected one. | |||||||||||||||
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Implementation Two
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Pass Two
Results
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-- FrankGolf - 23 Jun 2008 This is a collection of notes summarizing my MET study. | ||||||||
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Implementation Two
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-- FrankGolf - 23 Jun 2008 This is a collection of notes summarizing my MET study. | |||||||||||||||
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> > | Plots Legend
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Response Functions
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Implementation Two | |||||||||||||||
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> > | -- FrankGolf - 23 Jun 2008
This is a collection of notes summarizing my MET study.
Projects:NOTES
VARIABLES
Response Functions
Track Based Correction
Muons
Pass One
Quality Cuts
Implementation One
Implementation Two
|