SusyAnalysisBenchMarking

UNDER RECONSTRUCTION

Object Definition

(1) Reconstruction and Identification

Object Container Name pT(min), Eta Identification
Jet Cone4H1TowerJets 20GeV, abs(eta)<2.5 none
Electron ElectronAODContainer 10GeV, abs(eta)<2.5 isem(ElectronMedium)==0, Author&1==1, etcone20<10GeV
Muon StacoMuonCollection 10GeV, abs(eta)<2.5 isHighPt, isCombined, etcone20<10GeV, 0<=matchChi2<=100, fitChi2/dof>=0
PtMiss MET_RefFinal    

** N.B. Use rel15.2.0 or later release since ElectronMedium definition is changed.

isem (identification), Author, etcone20 (calorimeter isolation)

Example how to access identification, shower parameters for leptons etc

Electron, Parameter definition, PID definition

Muon, Parameter definition

(2) Overlap removal and further isolation requirement

After applying above object selection

- Overlap removal : Remove a jet which is close to any electrons with dR<0.2 (since each reconstruction algorithm is executed independently)
- Additional isolation : Remove an electron and a muon which is close to any jets with dR<0.4

(3) Event variables

Object Definition
Crack Electron veto reject ambiguous events containing electron(s) with isem(ElectronMedium), Author&1, pT=10GeV and abs(eta)=[1.37,1.52]
Meff (effective mass) PtMiss + Sum of pT(leading four selected jets if 4th jet with pT>20GeV) + pT(leading identified lepton if exist)
sT (transverse sphericity) sT based on all selected jets and identified leptons, i.e. with pT>20GeV and fabs(eta)<2.5
dPhiMin minimum deltaPhi between mET and three leading jets

Mc08 rel14 (10TeV) sample to check your result

- SU4 : mc08.106400.SU4_jimmy_susy.merge.AOD.e352_s462_r635_t53/AOD.068268._00001.pool.root.1 (10,000 events)
- TTbar : mc08.105200.T1_McAtNlo_Jimmy.merge.AOD.e357_s462_r635_t53/AOD.064814._00001.pool.root.1 (9943 events)

Cut Flow

Multi-jet (>=3) + PtMiss + 0 lepton mode

  SU4(low mass SUSY) T1(top with no full hadronic)
cut id Selection # of events (10TeV) # of events (7TeV) # of events (10TeV) # of events (7TeV)
0 no cut 10000 3392(82) 7311 2672(73)
1 crack electron veto 9670 3300(81) 7076 2286(72)
2 # of jets >=3 8133 2624(72) 5973 2217(67)
3 pT(leading jet)>100GeV, pT(3rd jet)>50GeV 4735 1456(54) 1567 538(33)
4 No lepton with pT>20GeV 3731 1167(48) 883 296(24)
5 PtMiss > 100GeV 2555 816(40) 245 80(13)
6 PtMiss > 0.2*Meff 2062 673(37) 213 71(12)
7 sT>0.2 1470 476(31) 143 48(10)
8 dPhiMin>0.2 1355 439(29) 132 45(9)

Multi-jet (>=3) + PtMiss + 1 lepton mode

  SU4(low mass SUSY) T1(top with no full hadronic)
cut id Selection # of events (10TeV) # of events (7TeV) # of events (10TeV) # of events (7TeV)
0 no cut 10000 3392(82) 7311 2671(73)
1 crack electron veto 9670 3300(81) 7076 2286(72)
2 # of jets >=3 8133 2624(72) 5973 2217(67)
3 pT(leading jet)>100GeV, pT(3rd jet)>50GeV 4735 1456(54) 1567 538(33)
4 One lepton with pT>20GeV, 2nd lepton veto (<10GeV) 809 235(22) 631 222(21)
5 PtMiss > 100GeV 532 155(18) 115 36(9)
6 PtMiss > 0.2*Meff 389 115(15) 88 29(8)
7 sT>0.2 304 90(13) 61 20(6)
8 mT>100GeV 163 47(10) 3 1(1)

* Consider negative weights for T1 MC@NLO MC samples

* 7TeV result will differ due to random number (The number in the parentheses is a statistical error)

* How to rescale event from 10TeV to 7TeV, see PDF reweighting

* Event details (for debugging purpose)

SU4 event number, cut Id (which reject this event for noLep and onLep, separately) and event variables

T1 event number, cut Id (which reject this event for noLep and onLep, separately) and event variables


Major updates:
-- NaokoKanaya - 17-Feb-2010

Topic attachments
I Attachment History Action Size Date Who Comment
Texttxt su4.txt r1 manage 1914.8 K 2010-02-18 - 16:01 NaokoKanaya  
Texttxt top.txt r1 manage 1945.8 K 2010-02-18 - 16:02 NaokoKanaya  
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Topic revision: r10 - 2010-03-03 - NaokoKanaya
 
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