1. CMS-Bijing weekly meeting
Work Progress Report
J.Tao
IHEP-Beijing
CMS-Bijing weekly meeting
Dec. 04, 2009
EM shower Formulae Validation in Endcap
Longitudinal profile validation
The whole formulae validation in Endcap
2. Unconverted Gamma/Pi0 discrimination in Endcap, using the shower shape variables and second moments variables
3. Real data analysis: some plots for the first look at

2. Longitudinal profile validation in Endcap with preshpower
Longitudinal profile from CMS Geant4 Simulation in SW_3_1_2
9 energy points in Endcap with preshower:
E=10, 20, 30, 50, 80, 120, 150, 200, 250 GeV
Eta=2.2 , Phi= ~
1000 events at each energy point
Due to the effect of Preshower detector, the longitudinal formule changed
50GeV sample
MeV

3. Formule fitting with the Longitudinal profile
Energy (MeV)
2D of all events
50GeV sample
Layer
150GeV sample

4. Parameters Longitudinal Formule
Critical eneygy Ec=8.74 MeV
t0: in unit of layer.

5. EM shower Formulae validation for the EE case
26 layers along the particle direction;
New logitudinal paramters for the EE+ES region;
Same logitudinal paramters as Barrel case for other EE region, started from the front face of EE.
4 parameters were used in Minuit minimization procedure: A、 ΔE/Edep5x5 where ΔE=E0-Edep5x5、、
5x5 crystal array was used for the validation
3x3 matrix
lateral formule η φ 1 2 5 6 10 25 4 3 11 16 21 9 7 8 12 22 19 18 17 14 15 13 20 24 23
Crystal (or cell) number
Single Gamma Samples with E=50GeV, Eta=2.0, Phi=1.5
2000 gamma evetns,
1135 unconverted gamma evetns,
1082 FitOk events: FitStatus==3 && parameters not at it’s limit

6. Fit parameters A  Initial value limits
ΔE/Edep5x5 where ΔE=E0-Edep5x5 

7. EM shower fitting with fixed Delta Phi parameter
Fix DeltaPhi
Single Gamma Samples with E=50GeV, Eta=2.0, Phi=1.5
2000 gamma evetns,
1135 unconverted gamma evetns,
1029 FitOk events: FitStatus==3 && parameters not at it’s limit
3x3 matrix A 
limits
ΔE/Edep5x5 where ΔE=E0-Edep5x5

8. Try to do
Add a new paramter in the Lateral formule
Or any advice from others?

9. Unconverted Gamma/Pi0 discrimination in Endcap,
using the shower shape variables and second moments variables
--- MLP : Ranking result (top variable is best ranked)
--- MLP :
--- MLP : Rank : Variable : Importance
--- MLP : 1 : ShowerShape_S4oS : 2.059e+01
--- MLP : 2 : ShowerShape_TaoMmaj : 1.876e+01
--- MLP : 3 : ShowerShape_NormSigmaEtaEta : 1.123e+01
--- MLP : 4 : ShowerShape_NormSigmaEtaPhi : 9.008e+00
--- MLP : 5 : ShowerShape_S6oS : 6.132e+00
--- MLP : 6 : ShowerShape_PZM : 4.653e+00
--- MLP : 7 : ShowerShape_Zernike : 3.692e+00
--- MLP : 8 : ShowerShape_DS10BToS : 2.928e+00
--- MLP : 9 : ShowerShape_DS10RLoS : 2.875e+00
--- MLP : 10 : ShowerShape_S9mS1oS25mS1 : 2.237e+00
--- MLP : 11 : ShowerShape_R : 4.534e-01
--- MLP : 12 : ShowerShape_S9mE1E2oS : 3.377e-01
--- MLP : 13 : ShowerShape_E1E2oS : 3.076e-01
--- MLP : 14 : ShowerShape_E1E2oS : 1.966e-01
--- MLP : 15 : ShowerShape_E3x2ratio : 1.689e-01
--- MLP : 16 : ShowerShape_Lam2oLam : 6.051e-02
--- MLP : 17 : ShowerShape_NormSigmaPhiPhi : 1.015e-02
--- MLP : 18 : ShowerShape_LAT : 7.564e-03
10 input variables
~20%
57329 signal events and bkg events

10. Variables distributions

11. Real data analysis: some plots for the first look at
Data sample: /MinimumBias/BeamCommissioning09-rereco_FIRSTCOLL_v1/RECO
Analysze events out of events with CMSSW_3_3_4.
RecHits in Ecal Barrel
IPhi
RunID:
IEta
1 superModule and 4 Modules have no response
IEta: -85~-1, IPhi: 1-360

12. RecHits in Ecal Endcap
1 supercrystal in z+ and 2 supercrystals in z- no response. IX: 1~100, IY: 1-100
Energy of Hits
Endcap
Barrel
Mean:0.083
Sigma:0.026

13. Energy of RecHits in HCAL
60796 events

14. EM objects
5 photons in events
No electron in events

15. Track & Muon
60796 events
events

16. Other objects 335292 events 60796 events CaloJets, No correction
CaloTower