How to run the W-tagging scalefactor code

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installation instructions

cmsrel CMSSW_7_4_7
cd CMSSW_7_4_7/src
cmsenv
export ROOFITSYS="/cvmfs/cms.cern.ch/slc6_amd64_gcc491/lcg/roofit/5.34.22-cms"
source /cvmfs/cms.cern.ch/slc6_amd64_gcc491/lcg/root/5.34.22-cms/bin/thisroot.sh

getting the code

clone the repo

running

python Automatic_Setup.py --vclean 1#To compile
python wtagSFfits_N2DDT_2017.py -b --useN2DDT   #To run

The basic script to be run is

python wtagSFfits_N2DDT.py

It takes as input .root files containing a TTree with a branch for the mass distribution you want to calculate a scalefactor for. This branch can contain events after full selection is applied, or new selections can be implemented on the fly in wtagSFfits.py. In addition to a data and the separate background MC files, you need one file called "pseudodata wchich contains all MC added together (with their appropriate weights, using ROOT hadd).

General Options:

    -b : To run without X11 windows
    -c : channel you are using(electron,muon or electron+muon added together)
    --HP : HP working point
    --LP : LP working point
    --fitTT : Only do fits to truth matched tt MC
    --fitMC : Only do fits to MC (test fit functions)
    --sample : name of TT MC eg --sample "herwig"
    --doBinned : to do binned simultaneous fit (default is unbinned)
    --76X : Use files with postfix "_76X" (change to postfix of your choice if running on several different samples)
    --useDDT : Uses DDT tagger instead of pruning+softdrop (ops! Requires softdrop variables)
    --usePuppiSD : Uses PUPPI + softdrop and PUPPI n-subjettiness
    --useN2DDT: Uses N2DDT