Skim

(preselection)

Sequences to produce microAOD are contained in microAOD_cff

it contains the HLT filters and the skim selection sequences

the output format is defined in microAOD_Output_cff

Skim selections

• leading lepton pt>45 GeV
• subleading lepton pt>30 GeV
• jets pt>20 GeV
• events with 2 leptons and 2 jets (no flavour requirement)

Data and MC are selected using ((OR of all the triggers physics triggers) AND (skim selection)) OR (tag&probe)

skims are defined in different cff files:

• skimElectron_cff
• skimMuon_cff
• skimEMu_cff
• skimJets_cff and combined in microAOD_cff