C++ Wrapper of fastMTT

Content

This package contains the following components:

• fastmtt_cpp.cpp - C++ wrapper of fastMTT algorithm
• kinfit_3pr.cpp - C++ wrapper of kinematic fit for tau(X)+tau(a1) decays
• kinfit_3pr_3pr.cpp - C++ wrapper of kinematic fit for tau(a1)+tau(a1) decays
• functions.h - collection of functions used in fastmtt and kinfit
• KinFit.cpp - C++ code used for compilation of
• compile_kinfit.bash - compilation script (creates shared library)
• test_kinfit.py - testing script
• pybind11 - folder of pybind11 package (C++ binding to python)
• Plot.py - plotting macro

Getting code from git

cd $CMSSW_BASE/src
git clone --recurse-submodules https://github.com/raspereza/DiTauMass.git
cd $CMSSW_BASE/
scramv1 b -j 4

Compiling shared library

cd $CMSSW_BASE/src/
./compile_kinfit.bash

Running test

Evaluating FastMTT:

Example for tt channel:

python3 FastMTT/examples/batch_processing.py /eos/cms/store/group/phys_tau/lrussell/forAliaksei/CPSignalStudies/Run3_2022EE/tt/GluGluHTo2Tau_UncorrelatedDecay_SM_Filtered_ProdAndDecay/nominal/merged.root --entry-stop 200000

this will create file merged.root in the working directory.

Then you have to run the test file and give the adress to the file. For example:

./test_kinfit.py merged.root --channel tt

The script will create RooT file named kinfit_3pr_tt.root which you can inspect.