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[PWGCF] FemtoUniverse: Add KK invariant mass, add everything to a new process function #18588

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[PWGCF] FemtoUniverse: Add KK invariant mass, add everything to a new process function #18588

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ad2155e
Configurables for histograms to reduce amount of used resources
Nov 3, 2026
13f8631
Changes required by aliBuild
Nov 3, 2026
a0af32b
PWGCF: FemtoUniverse -- KK invariant mass, new process function
Nov 4, 2026
42813b8
PWGCF: FemtoUniverse -- KK invariant mass, new process function part 2
Nov 4, 2026
705c78e
PWGCF: FemtoUniverse -- KK invariant mass, new process function part 3
Nov 4, 2026
1c54842
PWGCF: FemtoUniverse -- KK invariant mass, new process function part 4
Nov 4, 2026
2fdd6a2
Merge branch 'master' into FemtoUniversepPhi-04-11-2026
zchochul Nov 4, 2026
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56 changes: 48 additions & 8 deletions PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -561,28 +561,28 @@ struct FemtoUniversePairTaskTrackPhi {
TLorentzVector part1Vec;
TLorentzVector part2Vec;

float mMassOne = o2::constants::physics::MassKPlus;
float mMassTwo = o2::constants::physics::MassKMinus;
float mMassKp = o2::constants::physics::MassKPlus;
float mMassKm = o2::constants::physics::MassKMinus;

for (auto const& [kaon1, kaon2] : combinations(CombinationsStrictlyUpperIndexPolicy(partsKaons, partsKaons))) {
if ((confFillMinvBackgroundKpKp) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == 1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassOne);
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassKp);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassKp);
TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
registryPhiMinvBackground.fill(HIST("InvariantMassKpKp"), sumVec.M());
}
if ((confFillMinvBackgroundKmKm) && (kaon1.mAntiLambda() == -1) && (kaon2.mAntiLambda() == -1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassTwo);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassKm);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassKm);

TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
registryPhiMinvBackground.fill(HIST("InvariantMassKmKm"), sumVec.M());
}
if ((confFillMinvBackgroundKpKm) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == -1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassKp);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassKm);

TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
Expand Down Expand Up @@ -784,6 +784,46 @@ struct FemtoUniversePairTaskTrackPhi {
}

PROCESS_SWITCH(FemtoUniversePairTaskTrackPhi, processMCReco, "Process MC reco data", false);

void processMinvBackground(([[maybe_unused]] FilteredFemtoFullParticles const& parts))

@vkucera vkucera Nov 5, 2026

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parts is never used. Why do you not just remove it?

{
if (!confFillMinvBackground) {
return;
}

TLorentzVector part1Vec;
TLorentzVector part2Vec;

float mMassOne = o2::constants::physics::MassKPlus;
float mMassTwo = o2::constants::physics::MassKMinus;

for (auto const& [kaon1, kaon2] : combinations(CombinationsStrictlyUpperIndexPolicy(partsKaons, partsKaons))) {
if ((confFillMinvBackgroundKpKp) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == 1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassOne);
TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
registryPhiMinvBackground.fill(HIST("InvariantMassKpKp"), sumVec.M());
}
if ((confFillMinvBackgroundKmKm) && (kaon1.mAntiLambda() == -1) && (kaon2.mAntiLambda() == -1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassTwo);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);

TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
registryPhiMinvBackground.fill(HIST("InvariantMassKmKm"), sumVec.M());
}
if ((confFillMinvBackgroundKpKm) && (kaon1.mAntiLambda() == 1) && (kaon2.mAntiLambda() == -1)) {
part1Vec.SetPtEtaPhiM(kaon1.pt(), kaon1.eta(), kaon1.phi(), mMassOne);
part2Vec.SetPtEtaPhiM(kaon2.pt(), kaon2.eta(), kaon2.phi(), mMassTwo);

TLorentzVector sumVec(part1Vec);
sumVec += part2Vec;
registryPhiMinvBackground.fill(HIST("InvariantMassKpKm"), sumVec.M());
}
}
}
PROCESS_SWITCH(FemtoUniversePairTaskTrackPhi, processMinvBackground, "Enable processing invariant mass background for kaon pairs (K+K+, K-K-, K+K-)", false);
};

WorkflowSpec defineDataProcessing(ConfigContext const& cfgc)
Expand Down
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