=== Sorting, ratio plot, next steps ===
  - Actually we don't need to sort jets by mass, because it is less efficient then sorting by pT.{{ :users:danyyl:dijet:dijet_eff.jpg?nolink |}} Plot shows efficiency for different matching. The blue one is the sorting by pt, grey one - by mass. So, use the previous sorting. It is the case for all masses (300, 400, 500, 600 GeV)
  - Fixing the ratio plot. Error should be ''Error(data)/Sqrt(fit)'' {{ :users:danyyl:dijet:bkg_fit_fix_ratio.jpg?nolink |}}
  - We need to understand why we have empty files (maybe because of json file).
  - Try to extrapolate intermediate mass point with function described here http://cms.cern.ch/iCMS/jsp/openfile.jsp?tp=draft&files=AN2015_063_v7.pdf (p.29){{ :users:danyyl:dijet:form.jpg?nolink |}}