# Presentation: 801324

## Plug ElectronGen 5 Data-MC comparison

- Plug ElectronGen 5 Data-MC comparison

## Data Samples

- Focus on data collected from Feb2002 to Feb2004 (runs 141544-179056) corresponding to 180pb-1 of Integrated Luminosity (Good Run List 1011 v.5.0)
- Data:
- bhel0d: Central Electron trigger path produced with 5.3.1(for Z->ee CP)
- MC:
- ztop2i book=CDFPTOP (Z->ee) no Min Bias
- zewkae book=CDFPEWK (Z->ee + MinBias)

## Z->ee CP

- Used to check electron energy scales
- Energy of PlugElectron is corrected for Zvertex found by ZvertexColl and all known correction (Face,LERs,etc...)
- PlugElectronEnergy from TopAlgorithms::correctElectron
- Z->ee CP selection:
- one Tight Central Electron
- one Plug Electron with:
- 1.1<|eta|<2.8
- ET>20 GeV
- HadEm<0.125
- 80GeV/c2 <Mee<100 GeV/c2

- Use E/P evaluated from plug electron to check plug material

- Further Selection:
- Hadem<0.05
- Isorel<0.1
- Track Matching (DxDy<3)
- |Trkz0|<60cm

- Cuts defining Denominator

- Cuts to study E/P

## Energy Tuning(Z->ee CP)

- Comparison with ztop2i MC(No Min Bias)

- Unchanged if MinBias sample is used.

- Data

- MC

## Z->ee CP background

- Background contamination at various selection level has been evaluated from fake rate (vs Jet Et)

- Selection:
- Denominator
- Cuts to study E/P

- Bkg Fraction
- 4.5%
- 0.1%

## IsoRel

- Data: Z->ee CP
- Data-MC ztop2i(No Min Bias) and Data-MC zewkae(MB)

- Denominator Selection

## Hadem

- Data: Z->ee CP
- Data-MC ztop2i(No Min Bias) and Data-MC zewkae(MB)

- Denominator Selection

##  E/P Distributions

- Studying E/P to check material after the “Cuts to study E/P”

- Further Selection:
- Hadem<0.05
- Isorel<0.1
- Track Matching (DxDy<3)
- |Trkz0|<60cm

- Cuts defining Denominator

- Cuts to study E/P

- Z->ee CP selection:
- one Tight Central Electron
- one Plug Electron with:
- 1.1<|eta|<2.8
- ET>20 GeV
- HadEm<0.125
- 80GeV/c2 <Mee<100 GeV/c2

##  E/P Distributions

- Data-MC ztop2i(No Min Bias)

##  E/P: Check of material

- Data Z->ee (CP)-MC (ztop2i) -MC zewkae(MB)

- Double Ratio Calculation:

- about 10%X0 more material in MC
- Probably in the copper disks in front of plug z=167cm

##  E/P: Check vs Eta Phi

- Data Z->ee (CP)-MC (ztop2i)

- E/P Ratio vs eta

- E/P Ratio vs Phi

##  E/P: Check vs Eta

-  E/P: Check vs Eta

- Data Z->ee (CP)-MC (ztop2i)

- <-2
- -2<<-1
- 1<<2
- 2<

- 2.0+/-0.7      1.2  +/-0.5      2.5  +/-0.9     DATA
- 1.7+/-0.1      1.52+/-0.11    0.97+/-0.08   MC
- 1.4  +/-0.10  0.71+/-0.06    0.35+/-0.04   DATA
- 1.54+/-0.03  0.76+/-0.01    0.40+/-0.00   MC
- 1.3  +/-0.08  0.65+/-0.05   0.34+/-0.03    DATA
- 1.45+/-0.02  0.70+/-0.01   0.36+/-0.00    MC
- 1.8  +/-0.7    1.7 +/-0.6      0.9  +/-0.4      DATA
- 1.91+/-0.14  1.69+/-0.13   1.08+/-0.09    MC

- [1.1,1.5]/[0.9,1.1] [1.5,2.0]/[0.9,1.1]   [2.0,2.5]/[0.9,1.1]

##  E/P: Check vs Track Algos

- Data Z->ee (CP)-MC (ztop2i)

- OutsideIn

- InsideOut

- SiSA

- Data
- 1.36+/-0.7
- 0.67+/-0.04
- 0.35+/-0.03
- 1.27+/-0.20
- 0.73+/-0.13
- 0.38+/-0.08
- 1.90+/-0.42
- 1.31+/-0.31
- 1.19+/-0.28

- [1.1,1.5]/[0.9,1.1]
- [1.5,2.0]/[0.9,1.1]
- [2.0,2.5]/[0.9,1.1]
- [1.1,1.5]/[0.9,1.1]
- [1.5,2.0]/[0.9,1.1]
- [2.0,2.5]/[0.9,1.1]
- [1.1,1.5]/[0.9,1.1]
- [1.5,2.0]/[0.9,1.1]
- [2.0,2.5]/[0.9,1.1]

- MC
- 1.48+/-0.02
- 0.73+/-0.01
- 0.38+/-0.00
- 1.59+/-0.05
- 0.69+/-0.03
- 0.34+/-0.02
- 1.94+/-0.10
- 1.76+/-0.09
- 1.04+/-0.06

##  Conclusions

- Seems that MC has slightly (~10% X0) more material in front of Plug
- We think it is located in the copper disks in front of plug
- Plans: Would like to generate ztop2i with ~10% less X0 in Plug and check again ratios of E/P

##  Copper Disks

- All units in cm

- from SiliconGeometry/src/HWSiDetectorNode.cc

- 10% of X0 is ~1.4mm

## Efficiencies (MC Z->ee CP)

- Comparison with ztop2i MC(No Min Bias) and zewkae (MB)