• The following two centrally produced files should be used:
  • the pile-up JSON file pileup_JSON_DCSONLY_190389-208686_All_2012_pixelcorr.txt
  • the list of good lumi sections Cert_190456-208686_8TeV_22Jan2013ReReco_Collisions12_JSON.txt

• The actual pile-up profile is easily generated with the command

 pileupCalc.py -i Cert_190456-208686_8TeV_22Jan2013ReReco_Collisions12_JSON.txt --inputLumiJSON pileup_JSON_DCSONLY_190389-208686_All_2012_pixelcorr.txt --calcMode true --minBiasXsec 69400 --maxPileupBin 60 --numPileupBins 60  DataPUProfile_2013Jan22.root

• Here you can find info about PU JSON file for data
• If you are interested in a specific run range then you have to filter the two JSON files above as described here
• You can download directly the JSON files with the command

  wget --no-check-certificate https://cms-service-dqm.web.cern.ch/cms-service-dqm/CAF/certification/Collisions12/8TeV/Reprocessing/Cert_190456-208686_8TeV_22Jan2013ReReco_Collisions12_JSON.txt

• Get the MC PU distribution from here