Data Correction and Unfolding

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At what "truth" level should data and theory generally be compared?

What corrections are optimal for data to be used in MC tuning?

Issues include:

  • Jet calibration: what truth do we calibrate to? (see last Les Houches for accord on final states)
  • What is an electron? How to treat/correct for photon radiation.
  • Resonances: e.g. do we measure a Z or a lepton mass distribution?
  • Photon isolation at the truth level
  • Role of detector simulation (see Tools_and_Monte_Carlo_Session_2_(BSM)#Detector_simulation_.28with_Session_1.29 for related discussions)
  • ...
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