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Fix energy #31

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Fix energy #31

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d263b95
Fix energy
clementhelsens Mar 15, 2021
fd7a874
Merge branch 'main' into clementhelsens-patch-2
jmcarcell Sep 26, 2025
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8 changes: 6 additions & 2 deletions converter/src/DelphesEDM4HepConverter.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -255,8 +255,12 @@ void DelphesEDM4HepConverter::processTracks(const TClonesArray* delphesCollectio
auto cand = particleCollection->create();
cand.setCharge(delphesCand->Charge);
const auto momentum = delphesCand->P4();
cand.setEnergy(momentum.E());
cand.setMomentum({(float)momentum.Px(), (float)momentum.Py(), (float)momentum.Pz()});

//Particle masses in Delphes are 0, so the energy should be recalculated if ones sets the mass to something else
//cand.setEnergy(momentum.E());
cand.setEnergy(sqrt(momentum.Px()*momentum.Px() + momentum.Py()*momentum.Py() + momentum.Pz()*momentum.Pz()) + trackMass*trackMass);
cand.setMomentum({(float)momentum.Px(),(float)momentum.Py(), (float)momentum.Pz()});

// At this point indiscriminantly set the mass for each track. If this is a
// muon or an electron, the mass will be set to the appropriate value later.
cand.setMass(trackMass);
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