JetToolHelpers

Goal

This project is an Athena interface to ROOT Histograms whose goal is to allow the user to provide compile time axis interpretations.

Usage

#include "HistoInput.h"

HistoInput histogram = HistoInput(
    "MachuPichu",                   
    "./R4_AllComponents.root",                            // the .root file containing 
    "EtaIntercalibration_Modelling_AntiKt4EMPFlow",       // this Histogram
    "absrapidity", "float", true, "abseta", "float", true // the axes interpretations
);

histogram.initialize();     // reads the .root file, checks dimensions.

xAOD::Jet jet{5, 5, 5, 5};
JetContext jc;
double x{0};

// getValue will know how to read abs(jet.rapidity) and abs(jet.eta)
// when interpolating in the histogram. 
std::cout << histogram.getValue(jet, jc, x) std << cout;

Dependencies

ATHENA includes are mocked and only requires a local C++17 ROOT installation.

Since April 13th 2022 ROOT has prebuilt binary releases available.

This project has been built with Release 6.26/02.

Configuring CMake

The root CMakeLists.txt file defines where all sources are. CMake has a find package method that makes ROOT_INCLUDE_DIRS and ROOT_LIBRARIES variables available. Your local root installation location must be defined in this file. The CMake variable ROOT_DIR must be set for find_package(ROOT) to work.

set(ROOT_DIR /your/path/to/where/you/extracted/root/)

If your configuration is correct, please go to the build directory and run cmake.

JetToolHelpers/build$ mkdir build && cd build
JetToolHelpers/build$ cmake ../
JetToolHelpers/build$ make

Testing

After having successfully built the project, you can run the tests with

JetToolHelpers/build$ ctest

If you would like more output, or if a test doesn't pass, you can use,

JetToolHelpers/build$ ctest --verbose

Authors

S. Schramm Université de Genève, A. Freeman Université de Genève.