This repository contains code to evaluate the response of the simulated ePIC Barrel Hadronic Calorimeter (BHCal). There are a few pieces of code:

• JCalibrateHCalWithImaging: Found in the plugin directory, this is a simple JANA plugin to compare the reconstructed hit and cluster energy in the BHCal and BECal to simulated particles. This also prepares a TNtuple to be read in by a ROOT macro to train a TMVA model.
• BHCalCalibration: The source code is found in the src directory which is run with DoBHCalCalibration.cxx. This ingests the TNtuple from JCalibrateHCalWithImaging and trains a TMVA model according to set specifications.

There is also TrainAndApplyBHCalCalibration.cxx, a ROOT macro which does the same thing as the BHCalCalibration package. It was put together to test training and applying a TMVA model in the same macro.

The older macros which trained and applied the TMVA model separately (DoHCalCalibration.C and ApplyHCalCalibration.C respectively) are currently kept the macros directory for posterity.

JCalibrateHCal Usage

After compiling EICrecon, create and compile the plugin with:

eicmkplugin.py JCalibrateHCal
cp <path to this repo>/plugin/JCalibrateHCalProcessor.* ./JCalibrateHCal/
cmake -S JCalibrateHcal -B JCalibrateHCal/build
cmake --build JCalibrateHCal/build --target install

Then run it with:

eicrecon -Pplugins=JCalibrateHCal <input edm4hep file>

BHCalCalibration Usage

Compile the source code first with:

cd src/
./root-build

And then run the code with:

root -b -q DoBHCalCalibration.cxx

TrainAndApplyBHCalCalibration Usage

No need to compile this beforehand, just run it in the usual manner.

root -b -q TrainAndApplyBHCalCalibration.cxx

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TODO items:

• [Major] Streamline training/application workflow
• [Major] Factor out resolution calculation in training/application macro
• [Major] Factor out histogram plotting operations in trainining/application macro
• [Minor] Refactor histogram creation/style setting