H → WW → 2l selection for analysis skim and preselection

Complete: 3

Introduction

This document is a review for the CSA07 skimming and preselection of the H → WW silver channel. The skim consists into event selection and AODSIM output. The preselection consists into event tag and selected collections added to the AODSIM output format.

H → WW → 2l selection

The electron and muon decays of the W bosons produce 2 high Pt leptons. The preliminary requirement is the logical OR between the following 9 HLT streams: HLT1MuonIso, HLT1MuonNonIso, HLT2MuonNonIso, HLT1Electron, HLT1ElectronRelaxed, HLT2Electron, HLT2ElectronRelaxed, HLTXElectronMuon, HLTXElectronMuonRelaxed. Tau leptons will be considered later. For a significative background reduction two tracks with a minimum Pt are required.

HLT paths

The HLT paths are the following:

module higgsToWW2LeptonsHLTFilter = hltHighLevel from "HLTrigger/HLTfilters/data/hltHighLevel.cfi"
replace  higgsToWW2LeptonsHLTFilter.HLTPaths = {"HLT1MuonIso","HLT1MuonNonIso","HLT1Electron","HLT1ElectronRelaxed","HLT2MuonNonIso","HLT2Electron","HLT2ElectronRelaxed","HLTXElectronMuon","HLTXElectronMuonRelaxed"}

HiggsToWW2Leptons Filter module

A new filter module HiggsToWW2LeptonsFilter.cfi has been created. The module defines the collection names and cuts:

module higgsToWW2LeptonsFilter = HiggsToWW2LeptonsSkim {
  InputTag RecoTrackLabel            = recoTracks
  InputTag GlobalMuonCollectionLabel = globalMuons
  InputTag ElectronCollectionLabel   = pixelMatchGsfElectrons

  double SingleTrackPtMin = 20.0
  double DiTrackPtMin = 10.0
  double etaMin = -2.4
  double etaMax = 2.4
}

For the selection of Candidates the selector HiggsToWW2LeptonsSkim.cc was provided: http://cmssw.cvs.cern.ch/cgi-bin/cmssw.cgi/CMSSW/HiggsAnalysis/Skimming/src/HiggsToWW2LeptonsSkim.cc?revision=1.10&view=markup

HWW Skimming

The event selection is provided by the path HWWFilterPath (sequence of HLTFilter and 2LeptonFilter):

sequence higgsToWW2LeptonsSequence = {
  higgsToWWTrigReport & 
  higgsToWW2LeptonsHLTFilter & 
  higgsToWW2LeptonsFilter
}
path HWWFilterPath = { higgsToWW2LeptonsSequence }
vstring SelectEvents = {"HWWFilterPath"}

HWW Preselection

- lepton selection: Pt > 10 GeV , abs(eta) < 2.5
- choose hardest leptons as lepton1 and lepton2
- one lepton with pt>20 GeV
- lepton1 and lepton2 must have opposite charge
- met cut:  MET > 30 GeV
- invariant mass cut: InvMass > 12 GeV

Skimming results with CMSSW_1_6_7

Dataset Input events Output events Skim eff. Notes
/H120_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs130_WW_2l/USER 17250 4229 24.5 % misl. name
/H130_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs130_WW_2l/USER 17000 4704 27.7 %  
/H140_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs140_WW_2l/USER 16000 4938 30.9 %  
/H150_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs150_WW_2l/USER 19130 6380 33.3 %  
/H160_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs160_WW_2l/USER 51566 18442 35.8 %  
/H165_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs165_WW_2l/USER 51918 19062 36.7 %  
/H170_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs170_WW_2l/USER 43430 16116 37.1 %  
/H180_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs180_WW_2l/USER 28349 10741 37.9 %  
/H190_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs190_WW_2l/USER 20250 7735 38.2 %  
/H200_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs200_WW_2l/USER 17839 6924 38.8 %  
/H210_WW_2l/CMSSW_1_6_7-2l2nu_Skim-Higgs210_WW_2l/USER 16305 6382 39.1 %  
/WW_incl/CMSSW_1_6_7-2l2nu_Skim-WW_incl/USER 744261 40142 5.4 %  
/WZ_incl/CMSSW_1_6_7-2l2nu_Skim-WZ_incl/USER 362291 16214 4.5 %  
/ZZ_incl/CMSSW_1_6_7-2l2nu_Skim-ZZ_incl/USER 143113 10675 7.5 %  
/tW_inclusive/CMSSW_1_6_7-2l2nu_Skim-tW_inclusive/USER 438791 66789 15.2 %  
(*1) PDMuon-Gumbo-100pb 152637 42223 27.7 %  
(*2) PDMuon-Stew-100pb 1756592 139531 7.9 %  
(*3) PDMuon-Chowder-100pb 5002514 1015912 20.3 %  
(*4) PDElectron-Gumbo-100pb 1986548 38586 1.9 %  
(*5) PDElectron-Stew-100pb 179910 24295 13.5 %  
(*6) PDElectron-Chowder-100pb 4382197 849467 19.4 %  

(*1)/CSA07Muon/CMSSW_1_6_7-CSA07-Gumbo-B1-PDMuon-ReReco-100pb-Skims2-higgsToWW2LeptonsAODSIM/USER

(*2)/CSA07Muon/CMSSW_1_6_7-CSA07-Stew-B2-PDMuonReReco-100pb-Skims2-higgsToWW2LeptonsAODSIM/USER

(*3)/CSA07Muon/CMSSW_1_6_7-CSA07-Chowder-A3-PDMuon-ReReco-100pb-Skims2-higgsToWW2LeptonsAODSIM/USER

(*4)/CSA07Electron/CMSSW_1_6_7-CSA07-Gumbo-B1-PDElectron-ReReco-100pb-Skims5-higgsToWW2LeptonsAODSIM/USER

(*5)/CSA07Electron/CMSSW_1_6_7-CSA07-Stew-B2-PDElectronReReco-100pb-Skims5-higgsToWW2LeptonsAODSIM/USER

(*6)/CSA07Electron/CMSSW_1_6_7-CSA07-Chowder-A3-PDElectron-ReReco-100pb-Skims5-higgsToWW2LeptonsAODSIM/USER

Preselection results with CMSSW_1_6_7 reconstruction and CMSSW_1_6_9 electron ID

Dataset Input events Marker events Presel. rel. eff. Notes
/H120_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs120_WW_2l/USER 4229 2505 59.2 %  
/H130_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs130_WW_2l/USER 4704 2879 62.6 %  
/H140_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs140_WW_2l/USER 4938 3090 62.6 %  
/H150_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs150_WW_2l/USER 6380 4257 66.7 %  
/H160_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs160_WW_2l/USER 18442 12662 68.7 %  
/H165_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs165_WW_2l/USER 19062 13221 69.4 %  
/H170_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs170_WW_2l/USER 16116 11259 69.9 %  
/H180_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs180_WW_2l/USER 10741 7605 70.8 %  
/H190_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs190_WW_2l/USER 7735 5501 71.1 %  
/H200_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs200_WW_2l/USER 6924 4984 72.0 %  
/H210_WW_2l/CMSSW_1_6_9-2l2nu_Preselection-Higgs210_WW_2l/USER 6382 4602 72.1 %  
/WW_incl/CMSSW_1_6_9-2l2nu_Preselection-WW_incl/USER 40142 12606 31.4 %  
/WZ_incl/CMSSW_1_6_9-2l2nu_Preselection-WZ_incl/USER 16214 4278 26.4 %  
/ZZ_incl/CMSSW_1_6_9-2l2nu_Preselection-ZZ_incl/USER 10675 3601 33.7 %  
/tW_inclusive/CMSSW_1_6_9-2l2nu_Preselection-tW_incl/USER 66789 15092 22.6 %  
/CSA07Muon/CMSSW_1_6_9-2l2nu_Preselection-MuonGumbo-100pb/USER 42223 2010 4.8 %  
/CSA07Muon/CMSSW_1_6_9-2l2nu_Preselection-MuonStew-100pb/USER 139531 122 0.1 %  
/CSA07Muon/CMSSW_1_6_9-2l2nu_Preselection-MuonChowder-100pb/USER 1015912 106278 10.5 %  
/CSA07Electron/CMSSW_1_6_9-2l2nu_Preselection-ElectronGumbo-100pb/USER 38586 3905 10.1 %  
/CSA07Electron/CMSSW_1_6_9-2l2nu_Preselection-ElectronStew-100pb/USER 24295 122 0.5 %  
/CSA07Electron/CMSSW_1_6_9-2l2nu_Preselection-ElectronChowder-100pb/USER 849467 77813 9.2 %  

Warning

* Dataset published with CRAB_2_0_4 and CRAB_2_1_0. More recent CRAB versions manage LFN with different rules. 

Efficiencies plots

* Efficiencies comparison between Spring07 and CSA07:            * CSA07 efficiencies for HLT , Skimming and Preselection: 
HLTSkimEff.gif HLTSkimPresEff.gif

Review Status

Editor/Reviewer and date Comments
EzioTorassa - 26 May 2008 page author

Responsible: EzioTorassa
Last reviewed by:

Topic attachments
I Attachment History Action Size Date Who Comment
GIFgif HLTSkimEff.gif r1 manage 10.4 K 2008-04-11 - 15:24 EzioTorassa Efficiencies comparison between Spring07 and CSA07
GIFgif HLTSkimPresEff.gif r1 manage 9.0 K 2008-04-11 - 15:26 EzioTorassa CSA07 efficiencies for HLT , Skimming and Preselection
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Topic revision: r29 - 2008-05-26 - EzioTorassa



 
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