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[PWGUD] iterate collision manually #15825

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Merged
amatyja merged 11 commits into from
Apr 17, 2026
+64 −60
Merged

[PWGUD] iterate collision manually #15825

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d616170
add event consistency flag
miedema-11 Apr 2, 2026
913605e
add event consistency flag
miedema-11 Apr 2, 2026
7290de7
MC analysis for flow
miedema-11 Apr 2, 2026
9c3c820
use get track size
miedema-11 Apr 8, 2026
1f5dbfc
Merge branch 'master' of github.com:miedema-11/O2Physics
miedema-11 Apr 8, 2026
1a85369
preslice particles
miedema-11 Apr 15, 2026
98b1c0b
Merge branch 'master' into master
miedema-11 Apr 15, 2026
0563fcb
Merge branch 'AliceO2Group:master' into master
miedema-11 Apr 16, 2026
0dc9aab
not joining particllabel
miedema-11 Apr 16, 2026
751a111
iterate collsion manually
miedema-11 Apr 17, 2026
dd0f158
Merge branch 'master' into master
miedema-11 Apr 17, 2026
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124 changes: 64 additions & 60 deletions PWGUD/Tasks/flowMcUpc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -111,88 +111,92 @@ struct FlowMcUpc {

PresliceUnsorted<aod::UDMcParticles> partPerMcCollision = aod::udmcparticle::udMcCollisionId;

void processMCTrue(aod::UDMcCollisions::iterator const& mcCollision, aod::UDMcParticles const& mcParts, aod::BCs const& bcs)
void processMCTrue(aod::UDMcCollisions const& mcCollisions, aod::UDMcParticles const& mcParts, aod::BCs const& bcs)
{
if (bcs.size() == 0) {
return;
}
histos.fill(HIST("mcEventCounter"), 0.5);
float imp = mcCollision.impactParameter();
float vtxz = mcCollision.posZ();
for (const auto& mcCollision : mcCollisions) {
histos.fill(HIST("mcEventCounter"), 0.5);
float imp = mcCollision.impactParameter();
float vtxz = mcCollision.posZ();

if (imp >= minB && imp <= maxB) {
// event within range
histos.fill(HIST("hImpactParameter"), imp);
if (imp >= minB && imp <= maxB) {
// event within range
histos.fill(HIST("hImpactParameter"), imp);

auto const& tempParts = mcParts.sliceBy(partPerMcCollision, static_cast<int64_t>(mcCollision.globalIndex()));
auto const& tempParts = mcParts.sliceBy(partPerMcCollision, static_cast<int64_t>(mcCollision.globalIndex()));

for (auto const& mcParticle : tempParts) {
auto momentum = std::array<double, 3>{mcParticle.px(), mcParticle.py(), mcParticle.pz()};
int pdgCode = std::abs(mcParticle.pdgCode());
for (auto const& mcParticle : tempParts) {
auto momentum = std::array<double, 3>{mcParticle.px(), mcParticle.py(), mcParticle.pz()};
int pdgCode = std::abs(mcParticle.pdgCode());

double pt = RecoDecay::pt(momentum);
double eta = RecoDecay::eta(momentum);
double pt = RecoDecay::pt(momentum);
double eta = RecoDecay::eta(momentum);

if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton)
continue;
if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton)
continue;

if (!mcParticle.isPhysicalPrimary())
continue;
if (std::fabs(eta) > cfgCutEta) // main acceptance
continue;
if (!mcParticle.isPhysicalPrimary())
continue;
if (std::fabs(eta) > cfgCutEta) // main acceptance
continue;

histos.fill(HIST("hPtMCGen"), pt);
histos.fill(HIST("hEtaPtVtxzMCGen"), eta, pt, vtxz);
histos.fill(HIST("hPtMCGen"), pt);
histos.fill(HIST("hEtaPtVtxzMCGen"), eta, pt, vtxz);
}
}
}
}
PROCESS_SWITCH(FlowMcUpc, processMCTrue, "process pure simulation information", true);

using MCRecoTracks = soa::Join<aod::UDTracks, aod::UDTracksPID, aod::UDTracksExtra, aod::UDTracksFlags, aod::UDTracksDCA, aod::UDMcTrackLabels>;
using MCRecoCollisions = soa::Join<aod::UDCollisions, aod::SGCollisions, aod::UDCollisionSelExtras, aod::UDCollisionsSels, aod::UDZdcsReduced, aod::UDMcCollsLabels>;
using MCRecoCollisions = soa::Join<aod::UDCollisions, aod::UDCollisionSelExtras, aod::UDCollisionsSels, aod::UDZdcsReduced, aod::UDMcCollsLabels>;

// PresliceUnsorted<MCRecoTracks> trackPerMcParticle = aod::udmctracklabel::udMcParticleId;
Preslice<MCRecoTracks> trackPerCollision = aod::udtrack::udCollisionId; // sorted preslice used because the pair track-collision is already sorted in processDataSG function

void processReco(MCRecoCollisions::iterator const& collision, MCRecoTracks const& tracks)
void processReco(MCRecoCollisions const& collisions, MCRecoTracks const& tracks)
{
histos.fill(HIST("RecoProcessEventCounter"), 0.5);
// if (!eventSelected(collision))
// return;
histos.fill(HIST("RecoProcessEventCounter"), 1.5);
if (!collision.has_udMcCollision())
return;
histos.fill(HIST("RecoProcessEventCounter"), 2.5);
if (tracks.size() < 1)
return;
histos.fill(HIST("RecoProcessEventCounter"), 3.5);

float vtxz = collision.posZ();

auto const& tempTracks = tracks.sliceBy(trackPerCollision, static_cast<int64_t>(collision.globalIndex()));

for (const auto& track : tempTracks) {
// focus on bulk: e, mu, pi, k, p
auto momentum = std::array<double, 3>{track.px(), track.py(), track.pz()};
double pt = RecoDecay::pt(momentum);
double eta = RecoDecay::eta(momentum);
// double phi = RecoDecay::phi(momentum);
if (!trackSelected(track) || (!track.has_udMcParticle()))
continue;
auto mcParticle = track.udMcParticle();
int pdgCode = std::abs(mcParticle.pdgCode());

// double pt = recoMC.Pt();
// double eta = recoMC.Eta();
if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton)
continue;
if (std::fabs(eta) > cfgCutEta) // main acceptance
continue;
if (!mcParticle.isPhysicalPrimary())
continue;

histos.fill(HIST("hPtReco"), pt);
histos.fill(HIST("hEtaPtVtxzMCReco"), eta, pt, vtxz);
for (const auto& collision : collisions) {
histos.fill(HIST("RecoProcessEventCounter"), 0.5);
// if (!eventSelected(collision))
// return;
histos.fill(HIST("RecoProcessEventCounter"), 1.5);
if (!collision.has_udMcCollision())
return;
histos.fill(HIST("RecoProcessEventCounter"), 2.5);
if (tracks.size() < 1)
return;
histos.fill(HIST("RecoProcessEventCounter"), 3.5);

float vtxz = collision.posZ();

auto const& tempTracks = tracks.sliceBy(trackPerCollision, static_cast<int64_t>(collision.globalIndex()));

for (const auto& track : tempTracks) {
// focus on bulk: e, mu, pi, k, p
auto momentum = std::array<double, 3>{track.px(), track.py(), track.pz()};
double pt = RecoDecay::pt(momentum);
double eta = RecoDecay::eta(momentum);
// double phi = RecoDecay::phi(momentum);
if (!trackSelected(track) || (!track.has_udMcParticle()))
continue;
auto mcParticle = track.udMcParticle();
int pdgCode = std::abs(mcParticle.pdgCode());

// double pt = recoMC.Pt();
// double eta = recoMC.Eta();
if (pdgCode != PDG_t::kElectron && pdgCode != PDG_t::kMuonMinus && pdgCode != PDG_t::kPiPlus && pdgCode != PDG_t::kKPlus && pdgCode != PDG_t::kProton)
continue;
if (std::fabs(eta) > cfgCutEta) // main acceptance
continue;
if (!mcParticle.isPhysicalPrimary())
continue;

histos.fill(HIST("hPtReco"), pt);
histos.fill(HIST("hEtaPtVtxzMCReco"), eta, pt, vtxz);
}
}
}
PROCESS_SWITCH(FlowMcUpc, processReco, "process reconstructed information", true);
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