LPC CMSDAS 2019 - Tau Short Exercise

All code needed for the tau short exercise at the 2019 CMSDAS is contained in this repository. Basic templates for the analyzers are included and inteneded to be used by students to develope their own analyzers. A fully-implemented version of each analyzer is also included to be used as a reference.

Table of Contents

• Setting up an area in LPC
  
• Getting the code
  
• Input file location
  
• Compiling Analyzers
  
• Running Analyzers
  
• Plotting Scripts
  
  • Plotting the jet fake rate
    
  • Plotting the tau ID efficiency
    
  • Producing ROC curves
    

Setting up an area in LPC

Before grabbing the code, we need to setup our environment and get a CMSSW release. First, setup your environment

source /cvmfs/cms.cern.ch/cmsset_default.csh  # .sh for bash
setenv SCRAM_ARCH slc6_amd64_gcc630  # for .csh
# export SCRAM_ARCH=slc6_amd64_gcc630  # for .sh

Then, make a new directory for this exercise and get a CMSSW release

mkdir TauExercise
cd TauExercise
cmsrel CMSSW_7_4_14
cd CMSSW_7_4_14/src
cmsenv

Getting the code

Clone this GitHub repository to get a copy of all the code you need

git clone [email protected]:CMSDASAtLPC/ShortExerciseTau.git

or if you don't have SSH keys setup

git clone https://github.com/CMSDASAtLPC/ShortExerciseTau.git

Input file location

All input ROOT files are located at in the LPC eos area

$ xrdfsls -u /store/user/cmsdas/2019/short_exercises/Taus
root://131.225.204.161:1094//store/user/cmsdas/2019/short_exercises/Taus/DYJetsToLL_M-50_Inc_ShortEx.root
root://131.225.204.161:1094//store/user/cmsdas/2019/short_exercises/Taus/SingleMuon.root
root://131.225.204.161:1094//store/user/cmsdas/2019/short_exercises/Taus/WJetsToLNu_Inc_ShortEx.root

Compiling Analyzers

A small bash script Make.sh can be used to compile the analyzers into a binary with the same name, but extension .exe. An example is shown below:

./Make.sh tauEfficiency_completed.cc

Running Analyzers

Analyzers take two extra inputs: (1) the output file name and (2) a path to the input file. An example is shown below:

tauEfficiency_completed.exe outputFile.root root://131.225.204.161:1094//store/user/tmitchel/DAS2019-Tau-Short/DYJetsToLL_M-50_Inc_ShortEx.root

Plotting Scripts

Plotting scripts are included to produce the plots you will need. To see how the plotting is down with PyROOT, open up one of the files and look around. They are quite simple.

Plotting the jet fake rate

python plotFakeRate.py

Plotting the tau ID efficiency

python plotEfficiency.py

Producing ROC curves

python plotRocCurve.py