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Final Fits (higgsdnafinalfit)

This is the branch for using final fits with the output of HiggsDNA.

Welcome to the new Final Fits package. Here lies a a series of scripts which are used to run the final stages of CMS Hgg analyses: signal modelling, background modelling, datacard creation, final statistical interpretation and final result plots.

You can follow the latest Final Fits tutorial here. Slides from an older flashgg-based tutorial series can be found here

Download and setup instructions

export SCRAM_ARCH=el9_amd64_gcc12
cmsrel CMSSW_14_1_0_pre4
cd CMSSW_14_1_0_pre4/src
cmsenv

COMBINE_TAG=07b56c67ba6e4304b42c3a6cdba710d59c719192
COMBINEHARVESTER_TAG=94017ba5a3a657f7b88669b1a525b19d34ea41a2
FINALFIT_TAG=higgsdnafinalfit

# Install Combine with the latest EL9 compatible branch
git clone https://github.com/cms-analysis/HiggsAnalysis-CombinedLimit.git HiggsAnalysis/CombinedLimit
cd HiggsAnalysis/CombinedLimit && git fetch origin ${COMBINE_TAG} && git checkout ${COMBINE_TAG}

# Install CombineTools in CombineHarvester
cd ${CMSSW_BASE}/src
bash <(curl -s https://raw.githubusercontent.com/cms-analysis/CombineHarvester/${COMBINEHARVESTER_TAG}/CombineTools/scripts/sparse-checkout-https.sh)
cd CombineHarvester && git fetch origin ${COMBINEHARVESTER_TAG} && git checkout ${COMBINEHARVESTER_TAG}

# Compile libraries
cd ${CMSSW_BASE}/src
cmsenv
scram b clean
scram b -j 8

# Install Final Fit package
git clone -b $FINALFIT_TAG https://github.com/cms-analysis/flashggFinalFit.git
cd flashggFinalFit/
source setup.sh

Contents

The Finals Fits package contains several subfolders which are used for the following steps:

  • Create the Signal Model (see Signal dir)
  • Create the Background Model (see Background dir)
  • Generate a Datacard (see Datacard dir)
  • Running fits with combine (see Combine dir)
  • Scripts to produce plots (see Plots dir)

The signal modelling, background modelling and datacard creation can be ran in parallel. Of course the final fits (Combine) requires the output of these three steps. In addition, the scripts in the Trees2WS dir are a series of lightweight scripts for converting standard ROOT trees into a RooWorkspace that can be read by the Final Fits package.

Finally, the objects and tools which are common to all subfolders are defined in the tools directory. If your input workspaces differ from the flashgg output workspace structure, then you may need to change the options here.

Each of the relevant folders are documented with specific README.md files.