-- MarcoZanetti - 2015-03-30

Link Utili

Framework and production

CMSSW

  • cmsDriver for private sample production
  • Development of algorithms (fat-jet, substructure b-tag, etc.)

Heppy

Production

  • Local LSF
  • List of datasets available at LNL

Monte Carlo

Signal generation

  • Implementation of models (simplified and EFT)
  • 4 or 5 flavour schemes
  • Cross checks with other DM models (within CMS and w.r.t. ATLAS)
  • GridPacks generation
  • Validation
  • Systematics assessment

Background generation

  • Overview of existing/scheduled central production
  • Dedicated b-enriched sample definition
  • 4 or 5 flavour schemes

Trigger

Trigger definition (for signal and control regions)

  • Check what exists already
  • Study optimization
  • Possibly deploy that

Efficiencies

  • Turn-on assessment (for offline working point definition)
  • Efficiencies and SF estimation

Selections

Cuts

  • Signal Region:
     met_pt>200 && jet1_pt>50 && jet1_chf>0.2 && jet1_nhf<0.7 && jet1_phf<0.7 && jet1_CSV>0.814 && ((nJets==1 && abs(jet1_dPhi_met)>2) || (nJets==2 && jet2_nhf<0.7 && jet2_phf<0.9 && abs(jet2_dPhi_jet1)<2.5 && jet2_CSV>0.814)) && nElectrons==0 && nTaus==0 && nPhotons==0 
  • W Control Region:
     HLT_BIT_HLT_IsoMu24_eta2p1_v && lepton1_isMuon && lepton1_tightId && lepton1_pt>30 && abs(lepton1_eta)<2.1 && lepton1_relIso04<0.12 
  • Z Control Region:
     HLT_BIT_HLT_IsoMu24_eta2p1_v && lepton1_isMuon && lepton1_tightId && lepton1_pt>20 && lepton1_relIso04<0.12 && lepton2_isMuon && lepton2_pt>15 && Z_mass>70 && Z_mass<110 

Objects

For each collection:
  • ID optimization
  • Efficiency and when needed SF estimation

Muons

  • ID and isolation for veto
  • ID and isolation for Z and W control regions
  • ID and isolation for jet cleaning
  • ID and isolation for b-jet selection

Missing Et

  • Choice of MET definition (pf, mva, puppi, etc)
  • Check of TypeN corrections
  • Calo Noise cleaning
  • Beam/cosmic background suppression
  • Bad event list removal
  • Application of recoil method

Jets

  • ID and lepton cleaning
  • Noise cleaning and beam/cosmic background reduction
  • Substructure studies

b-Jets

  • Working point definition for 1 and 2 tags
  • Substructure studies for 1 and 2 tags

Electrons and Taus

  • ID and isolation for veto

Photons

  • ID and isolation for veto
  • ID, isolation and Energy scale for CR selection
  • footprint studies

Analysis selection

  • Categories definition
  • Optimisation (S/B and event statistics) of selections in each category
  • Systematics assessment

Background estimation

Control Regions definition

  • Z->mm
  • gamma+jet
  • W->munu
  • QCD b-enriched?

Fit procedure

  • Cut&Count
  • Cut&Count++ (default)
  • Parametric
  • Closure tests
  • Bias studies

Other backgrounds

  • Cross section uncertainties
  • Acceptance/Efficiency uncertainties

Signal Extraction

Shape analysis

  • Development of strategy
  • Study of categories interplay
  • Systematics assessment

Cut&Count

  • Development of a backup approach

Combination and limit extractions

  • Combination of categories
  • Model dependent combination with other DM signatures
  • EFT-safe limits extraction

Documentation

  • Preliminary AN on Phys14
  • ANs on early data
  • PAS and combined PAS
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Topic revision: r7 - 2015-09-25 - MarcoZanetti
 
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