Les Houches

- train W-vs-q/g and q-vs-g with state-of-the-art generators

- consider training dijet vs Z+jet vs W(qq) without any use of “flavor-truth” to remain generator independent. cross check with CMS-style-parton-flavor-definition

- reweight to different observables in measurements, check performance

- make a rivet plugin of a ML-tagger as testbed to MC generators

- Identify which part of the hadronization process shows the largest discrepancy between the generators

- Cross-correlation between the discriminate of the same algorithm training using different MC generators. e.g. jet tagged with one MC generator, not tagged by the other

- Change some parameters of pythia's hadronization model. Can a classifier discriminate between those and help tuning

More in: More in https://www.overleaf.com/project/648ab3e1c164ede47c68c368

# setup LCG environment
source /cvmfs/sft.cern.ch/lcg/views/LCG_103/x86_64-centos7-gcc11-opt/setup.sh

# build example analysis
wget https://gitlab.com/hepcedar/rivet/-/raw/rivet-3.1.7/analyses/examples/EXAMPLE_NTUPLE_ROOT.cc
rivet-build RivetExampleAnalyses.so EXAMPLE_NTUPLE_ROOT.cc `root-config --cflags --libs`
export RIVET_ANALYSIS_PATH=$PWD

# check the build is successful
rivet --show-analysis EXAMPLE_NTUPLE_ROOT
# run it
rivet --analysis EXAMPLE_NTUPLE_ROOT 0000.hepmc

Start from example https://gitlab.com/hepcedar/rivet/-/blob/release-3-1-x/analyses/examples/EXAMPLE_NTUPLE_ROOT.cc

First version from Huilin: https://github.com/lh23-jss/lh23-jss-rivet

At hadron level with all particles HEPMC

Do not need the whole event, but only the particles within the leading jet

List of samples and generators, see https://phystev.cnrs.fr/wiki/2023:groups:smjets:jss-measurements:start