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[PWGCF] Femto universe 12.11.26 #18722

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[PWGCF] Femto universe 12.11.26 #18722

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b11f2f7
new process for K+K+ and K-K- invariant mass
Nov 12, 2026
1a4a33a
clang test
Nov 12, 2026
a754f9d
Arguments in a process function
Nov 12, 2026
385202c
Merge branch 'master' into FemtoUniverse-12.11.26
zchochul Nov 12, 2026
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58 changes: 48 additions & 10 deletions PWGCF/FemtoUniverse/Tasks/femtoUniversePairTaskTrackPhi.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -97,7 +97,6 @@ struct FemtoUniversePairTaskTrackPhi {
Preslice<FemtoRecoParticles> perColMC = aod::femtouniverseparticle::fdCollisionId;

Configurable<float> confZVertexCut{"confZVertexCut", 10.f, "Event sel: Maximum z-Vertex (cm)"};
// Configurable<int> confNEventsMix{"confNEventsMix", 5, "Number of events for mixing"};
Filter collisionFilter = (nabs(aod::collision::posZ) < confZVertexCut);
using FilteredFDCollisions = soa::Filtered<o2::aod::FdCollisions>;
using FilteredFDCollision = FilteredFDCollisions::iterator;
Expand Down Expand Up @@ -557,32 +556,31 @@ struct FemtoUniversePairTaskTrackPhi {

if (confFillMinvBackground) {
// Used for better fitting of invariant mass background.

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 +782,46 @@ struct FemtoUniversePairTaskTrackPhi {
}

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

void processMinvBackground(aod::Tracks const& tracks, aod::Collisions const& collisions)
{
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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