ATLAS B-tagging calibration using tag and probe method

This Wiki provides information about FTAG calibration studies using ttbar Tag&Probe method.


Packages have been developed by Changqiao and Cheng, working with CxAODs produced from FTAG framework.


There are two steps work: produce histograms in Ntuples, as input for efficiency and SFs measurement.

Setup for step-1 Ntuple processer:

mkdir NtupleProcesser
cd NtupleProcesser/
git clone ssh://git@gitlab.cern.ch:7999/changqia/NtupleProcesser.git
source NtupleProcesser/bootstrap/setup.sh
rc build
To run the code (configuration file is in NtupleProcesser/data/run.cfg)
NP 1 0 0
Run batch jobs on CC-IN2P3 for data+MC:
source NtupleProcesser/scripts/submit.py

Marge all output histograms to one root file (after ~ 4 hours running on batch)

cd /to/the/path/store/all/of/the/output/../
python ../../NtupleProcesser/scripts/parallel_hadd_lyon.py
hadd input.root *.root

Setup for step-2 measuring BTagging efficiency and SFs:

git clone ssh://git@gitlab.cern.ch:7999/changqia/BtaggingInputsProcessor.git
cd BtaggingInputsProcessor/
git clone ssh://git@gitlab.cern.ch:7999/changqia/Sharp.git AnalysisToolKit
source setup.sh
link the prepared one input file to given directory, like:
ln -s /sps/atlas/c/cli/BTagCalibration/FTAG_NtupleProcesser_14Nov.2017/Output/CalJetNov.16.2017.50WP/input.root ./input/CalJetNov.16.2017.50WP.root
run the code in one line
python run.py

Useful links

Major updates:
-- KunLiu - 2017-11-21

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Topic revision: r6 - 2017-12-18 - KunLiu
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