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Discussions about the package happen on the mailing list lcfi-vertex AT desy DOT de
Algorithms
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LCFIPlus contains the following algorithms:
- PrimaryVertexFinder - searches for the primary vertex
- BuildUpVertex - searches secondary vertices
- JetClustering - jet clustering using vertex information
- FlavorTag - prepares of flavor tagging input variables
- MakeNtuple - produces ROOT files containing ntuples for training
- TrainMVA - performs TMVA training
- ReadMVA - applies result of training
How to get flavor tagging information inside a Marlin processor:
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// get jet collection
LCCollection* colJet = evt->getCollection("VertexJets");
// get PIDHandler associated with the jet collection
PIDHandler pidh( colJet );
// get algorithm ID associated with LCFIPlus
int algo = pidh.getAlgorithmID( "lcfiplus" );
// get index number for flavor tagging
int ibtag = pidh.getParameterIndex(algo, "BTag");
int ictag = pidh.getParameterIndex(algo, "CTag");
// loop over jets to extract flavor tagging information
for(int i=0; i < colJet->getNumberOfElements(); i++) {
ReconstructedParticle *part =
dynamic_cast<ReconstructedParticle*>( colJet->getElementAt( i ) );
const ParticleID &pid = pidh.getParticleID(part, algo);
cout << "btag = " << pid.getParameters()[ibtag] << endl;
cout << "ctag = " << pid.getParameters()[ictag] << endl;
}
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