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Merged
skundu692 merged 14 commits into from
Jul 18, 2025
Merged

[PWGLF] Add optimized mixed event process function #12152

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dd70be0
add new expression for angular correlation
skundu692 Jun 8, 2025
5741981
Fix clang formating
skundu692 Jun 9, 2025
8bfae70
Add new process function to study derived data
skundu692 Jun 11, 2025
77cd188
Fix
skundu692 Jun 11, 2025
381358d
Fix clang and whitespace error
skundu692 Jun 18, 2025
ad46f1d
Fix indexing issue in derived data
skundu692 Jun 19, 2025
f0c7ce9
fix linter error
skundu692 Jun 19, 2025
21e9729
Modify azimuthal distribution
skundu692 Jul 10, 2025
fdbabcc
fix clang format
skundu692 Jul 10, 2025
4f52188
Add rapidity cut
skundu692 Jul 17, 2025
4f3bb05
Add optimized mixed event process function
skundu692 Jul 18, 2025
69b7d25
Merge branch 'master' into spincorrmix
skundu692 Jul 18, 2025
3babdd0
fix meaglinter error
skundu692 Jul 18, 2025
d23b323
clang error fix
skundu692 Jul 18, 2025
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156 changes: 126 additions & 30 deletions PWGLF/Tasks/Strangeness/lambdaspincorrderived.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@
#include "Framework/ASoAHelpers.h"
#include "Framework/AnalysisDataModel.h"
#include "Framework/AnalysisTask.h"
#include "Framework/BinningPolicy.h"
#include "Framework/StepTHn.h"
#include "Framework/runDataProcessing.h"
#include <Framework/Configurable.h>
Expand All @@ -29,14 +30,20 @@
#include <Math/GenVector/Boost.h>
#include <Math/Vector3D.h>
#include <Math/Vector4D.h>
#include <TLorentzVector.h>

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[root/lorentz-vector] 

Do not use the TLorentzVector legacy class. Use std::array with RecoDecay methods or the ROOT::Math::LorentzVector template instead.
#include <TMath.h>

#include <fairlogger/Logger.h>

#include <cmath> // for std::fabs
#include <deque>
#include <iostream>

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[include-iostream] 

Do not include iostream. Use O2 logging instead.
#include <iterator>
#include <set> // <<< CHANGED: for dedup sets
#include <string>
#include <type_traits>
#include <unordered_map> // <<< CHANGED: for seenMap
#include <utility>
#include <vector>

// o2 includes.
Expand All @@ -49,7 +56,7 @@
using namespace o2::soa;

struct lambdaspincorrderived {

// BinningType colBinning;
struct : ConfigurableGroup {
Configurable<std::string> cfgURL{"cfgURL", "http://alice-ccdb.cern.ch", "Address of the CCDB to browse"};
Configurable<int64_t> nolaterthan{"ccdb-no-later-than", std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now().time_since_epoch()).count(), "Latest acceptable timestamp of creation for the object"};
Expand All @@ -71,6 +78,7 @@
Configurable<float> centMax{"centMax", 80, "Maximum Centrality"};

// Lambda selection ////////////
Configurable<unsigned> harmonic{"harmonic", 1, "Harmonic delta phi"};
Configurable<bool> useweight{"useweight", 1, "Use weight"};
Configurable<bool> usePDGM{"usePDGM", 1, "Use PDG mass"};
Configurable<bool> checkDoubleStatus{"checkDoubleStatus", 0, "Check Double status"};
Expand Down Expand Up @@ -106,17 +114,17 @@
histos.add("hPtYSame", "hPtYSame", kTH2F, {{100, 0.0, 10.0}, {200, -1.0, 1.0}});
histos.add("hPtYMix", "hPtYMix", kTH2F, {{100, 0.0, 10.0}, {200, -1.0, 1.0}});
histos.add("hCentrality", "Centrality distribution", kTH1F, {{configThnAxisCentrality}});
histos.add("deltaPhiSame", "deltaPhiSame", HistType::kTH1D, {{72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("deltaPhiMix", "deltaPhiMix", HistType::kTH1D, {{72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("ptCent", "ptCent", HistType::kTH2D, {{100, 0.0, 10.0}, {8, 0.0, 80.0}}, true);
histos.add("etaCent", "etaCent", HistType::kTH2D, {{32, -0.8, 0.8}, {8, 0.0, 80.0}}, true);

histos.add("hLambdaSameForLL", "hLambdaSameForLL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("hLambdaSameForLAL", "hLambdaSameForLAL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("hAntiLambdaSameForALAL", "hAntiLambdaSameForALAL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.

histos.add("hLambdaMixForLL", "hLambdaMixForLL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("hLambdaMixForLAL", "hLambdaMixForLAL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

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[external-pi] 

Use the PI constant (and its multiples and fractions) defined in o2::constants::math.
histos.add("hAntiLambdaMixForALAL", "hAntiLambdaMixForALAL", HistType::kTH3D, {{50, 0.0, 5.0}, {32, -0.8, 0.8}, {72, 0.0, 2.0 * TMath::Pi()}}, true);

histos.add("hSparseLambdaLambda", "hSparseLambdaLambda", HistType::kTHnSparseF, {configThnAxisInvMass, configThnAxisInvMass, configThnAxisPol, configThnAxisCentrality, configThnAxisR}, true);
Expand Down Expand Up @@ -183,7 +191,7 @@
if (std::abs(candidate1.lambdaEta() - candidate2.lambdaEta()) > etaMix) {
return false;
}
if (std::abs(RecoDecay::constrainAngle(candidate1.lambdaPhi(), 0.0F) - RecoDecay::constrainAngle(candidate2.lambdaPhi(), 0.0F)) > phiMix) {
if (std::abs(RecoDecay::constrainAngle(candidate1.lambdaPhi(), 0.0F, harmonic) - RecoDecay::constrainAngle(candidate2.lambdaPhi(), 0.0F, harmonic)) > phiMix) {
return false;
}
if (std::abs(candidate1.lambdaMass() - candidate2.lambdaMass()) > massMix) {
Expand All @@ -195,7 +203,7 @@
void fillHistograms(int tag1, int tag2,
const ROOT::Math::PtEtaPhiMVector& particle1, const ROOT::Math::PtEtaPhiMVector& particle2,
const ROOT::Math::PtEtaPhiMVector& daughpart1, const ROOT::Math::PtEtaPhiMVector& daughpart2,
double centrality, int datatype)
double centrality, int datatype, float mixpairweight)
{

auto lambda1Mass = 0.0;
Expand Down Expand Up @@ -230,41 +238,42 @@

auto cosThetaDiff = -999.0;
cosThetaDiff = proton1LambdaRF.Vect().Unit().Dot(proton2LambdaRF.Vect().Unit());
double deltaPhi = std::abs(RecoDecay::constrainAngle(particle1Dummy.Phi(), 0.0F) - RecoDecay::constrainAngle(particle2Dummy.Phi(), 0.0F));
double deltaPhi = std::abs(RecoDecay::constrainAngle(particle1Dummy.Phi(), 0.0F, harmonic) - RecoDecay::constrainAngle(particle2Dummy.Phi(), 0.0F, harmonic));
double deltaEta = particle1Dummy.Eta() - particle2Dummy.Eta();
double deltaR = TMath::Sqrt(deltaEta * deltaEta + deltaPhi * deltaPhi);

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[root/entity] 

Replace ROOT entities with equivalents from standard C++ or from O2.

if (datatype == 0) {
histos.fill(HIST("hPtYSame"), particle1.Pt(), particle1.Rapidity());
mixpairweight = 1.0;
histos.fill(HIST("hPtYSame"), particle1.Pt(), particle1.Rapidity(), mixpairweight);
if (tag1 == 0 && tag2 == 0) {
histos.fill(HIST("hSparseLambdaLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR);
histos.fill(HIST("hLambdaSameForLL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F));
histos.fill(HIST("hSparseLambdaLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, mixpairweight);
histos.fill(HIST("hLambdaSameForLL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), mixpairweight);
} else if ((tag1 == 0 && tag2 == 1) || (tag1 == 1 && tag2 == 0)) {
histos.fill(HIST("hSparseLambdaAntiLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR);
histos.fill(HIST("hLambdaSameForLAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F));
histos.fill(HIST("hSparseLambdaAntiLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, mixpairweight);
histos.fill(HIST("hLambdaSameForLAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), mixpairweight);
} else if (tag1 == 1 && tag2 == 1) {
histos.fill(HIST("hSparseAntiLambdaAntiLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR);
histos.fill(HIST("hAntiLambdaSameForALAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F));
histos.fill(HIST("hSparseAntiLambdaAntiLambda"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, mixpairweight);
histos.fill(HIST("hAntiLambdaSameForALAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), mixpairweight);
}
} else if (datatype == 1) {
double weight1 = 1.0;
double weight2 = 1.0;
double weight3 = 1.0;
double weight1 = mixpairweight;
double weight2 = mixpairweight;
double weight3 = mixpairweight;
if (useweight) {
weight1 = hweight1->GetBinContent(hweight1->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
weight2 = hweight2->GetBinContent(hweight2->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
weight3 = hweight3->GetBinContent(hweight3->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
weight1 = mixpairweight * hweight1->GetBinContent(hweight1->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
weight2 = mixpairweight * hweight2->GetBinContent(hweight2->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
weight3 = mixpairweight * hweight3->GetBinContent(hweight3->FindBin(particle1.Pt(), particle1.Eta(), particle1.Phi()));
}
histos.fill(HIST("hPtYMix"), particle1.Pt(), particle1.Rapidity());
if (tag1 == 0 && tag2 == 0) {
histos.fill(HIST("hSparseLambdaLambdaMixed"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, weight1);
histos.fill(HIST("hLambdaMixForLL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F), weight1);
histos.fill(HIST("hLambdaMixForLL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), weight1);
} else if ((tag1 == 0 && tag2 == 1) || (tag1 == 1 && tag2 == 0)) {
histos.fill(HIST("hSparseLambdaAntiLambdaMixed"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, weight2);
histos.fill(HIST("hLambdaMixForLAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F), weight2);
histos.fill(HIST("hLambdaMixForLAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), weight2);
} else if (tag1 == 1 && tag2 == 1) {
histos.fill(HIST("hSparseAntiLambdaAntiLambdaMixed"), particle1.M(), particle2.M(), cosThetaDiff, centrality, deltaR, weight3);
histos.fill(HIST("hAntiLambdaMixForALAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F), weight3);
histos.fill(HIST("hAntiLambdaMixForALAL"), particle1.Pt(), particle1.Eta(), RecoDecay::constrainAngle(particle1.Phi(), 0.0F, harmonic), weight3);
}
}
}
Expand Down Expand Up @@ -310,24 +319,24 @@
}
proton2 = ROOT::Math::PtEtaPhiMVector(v02.protonPt(), v02.protonEta(), v02.protonPhi(), o2::constants::physics::MassProton);
lambda2 = ROOT::Math::PtEtaPhiMVector(v02.lambdaPt(), v02.lambdaEta(), v02.lambdaPhi(), v02.lambdaMass());
histos.fill(HIST("deltaPhiSame"), std::abs(RecoDecay::constrainAngle(v0.lambdaPhi(), 0.0F) - RecoDecay::constrainAngle(v02.lambdaPhi(), 0.0F)));
histos.fill(HIST("deltaPhiSame"), std::abs(RecoDecay::constrainAngle(v0.lambdaPhi(), 0.0F, harmonic) - RecoDecay::constrainAngle(v02.lambdaPhi(), 0.0F, harmonic)));
if (std::abs(lambda2.Rapidity()) > rapidity) {
continue;
}
if (std::abs(lambda2.Eta()) > v0eta) {
continue;
}
if (v0.v0Status() == 0 && v02.v0Status() == 0) {
fillHistograms(0, 0, lambda, lambda2, proton, proton2, centrality, 0);
fillHistograms(0, 0, lambda, lambda2, proton, proton2, centrality, 0, 1.0);
}
if (v0.v0Status() == 0 && v02.v0Status() == 1) {
fillHistograms(0, 1, lambda, lambda2, proton, proton2, centrality, 0);
fillHistograms(0, 1, lambda, lambda2, proton, proton2, centrality, 0, 1.0);
}
if (v0.v0Status() == 1 && v02.v0Status() == 0) {
fillHistograms(1, 0, lambda2, lambda, proton2, proton, centrality, 0);
fillHistograms(1, 0, lambda2, lambda, proton2, proton, centrality, 0, 1.0);
}
if (v0.v0Status() == 1 && v02.v0Status() == 1) {
fillHistograms(1, 1, lambda, lambda2, proton, proton2, centrality, 0);
fillHistograms(1, 1, lambda, lambda2, proton, proton2, centrality, 0, 1.0);
}
}
}
Expand Down Expand Up @@ -388,7 +397,7 @@
lambda = ROOT::Math::PtEtaPhiMVector(t3.lambdaPt(), t3.lambdaEta(), t3.lambdaPhi(), t3.lambdaMass());
proton2 = ROOT::Math::PtEtaPhiMVector(t2.protonPt(), t2.protonEta(), t2.protonPhi(), o2::constants::physics::MassProton);
lambda2 = ROOT::Math::PtEtaPhiMVector(t2.lambdaPt(), t2.lambdaEta(), t2.lambdaPhi(), t2.lambdaMass());
histos.fill(HIST("deltaPhiMix"), std::abs(RecoDecay::constrainAngle(t3.lambdaPhi(), 0.0F) - RecoDecay::constrainAngle(t2.lambdaPhi(), 0.0F)));
histos.fill(HIST("deltaPhiMix"), std::abs(RecoDecay::constrainAngle(t3.lambdaPhi(), 0.0F, harmonic) - RecoDecay::constrainAngle(t2.lambdaPhi(), 0.0F, harmonic)));
if (std::abs(lambda.Rapidity()) > rapidity) {
continue;
}
Expand All @@ -402,22 +411,109 @@
continue;
}
if (t3.v0Status() == 0 && t2.v0Status() == 0) {
fillHistograms(0, 0, lambda, lambda2, proton, proton2, centrality, 1);
fillHistograms(0, 0, lambda, lambda2, proton, proton2, centrality, 1, 1.0);
}
if (t3.v0Status() == 0 && t2.v0Status() == 1) {
fillHistograms(0, 1, lambda, lambda2, proton, proton2, centrality, 1);
fillHistograms(0, 1, lambda, lambda2, proton, proton2, centrality, 1, 1.0);
}
if (t3.v0Status() == 1 && t2.v0Status() == 0) {
fillHistograms(1, 0, lambda2, lambda, proton2, proton, centrality, 1);
fillHistograms(1, 0, lambda2, lambda, proton2, proton, centrality, 1, 1.0);
}
if (t3.v0Status() == 1 && t2.v0Status() == 1) {
fillHistograms(1, 1, lambda, lambda2, proton, proton2, centrality, 1);
fillHistograms(1, 1, lambda, lambda2, proton, proton2, centrality, 1, 1.0);
}
}
} // replacement track pair
} // collision pair
}
PROCESS_SWITCH(lambdaspincorrderived, processME, "Process data ME", false);

void processMEV2(EventCandidates const& collisions, AllTrackCandidates const& V0s)
{
auto nBins = colBinning.getAllBinsCount();
std::vector<std::deque<std::pair<int, AllTrackCandidates>>> eventPools(nBins);

for (auto& collision1 : collisions) {
int bin = colBinning.getBin(std::make_tuple(collision1.posz(), collision1.cent()));
auto poolA = V0s.sliceBy(tracksPerCollisionV0, collision1.index());
float centrality = collision1.cent();

// <<< CHANGED: map old collision index → set of (t2.idx, t3.idx) we've already filled
std::unordered_map<int, std::set<std::pair<int, int>>> seenMap;

for (auto& [t1, t2] : soa::combinations(o2::soa::CombinationsFullIndexPolicy(poolA, poolA))) {
if (!selectionV0(t1) || !selectionV0(t2))
continue;
if (t2.index() <= t1.index())
continue;
if (t1.protonIndex() == t2.protonIndex())
continue;
if (t1.pionIndex() == t2.pionIndex())
continue;

int mixes = 0;
for (auto it = eventPools[bin].rbegin(); it != eventPools[bin].rend() && mixes < nEvtMixing; ++it, ++mixes) {
int collision2idx = it->first;
AllTrackCandidates& poolB = it->second;

int nRepl = 0;
for (auto& t3 : poolB) {
if (selectionV0(t3) && checkKinematics(t1, t3)) {
++nRepl;
}
}
if (nRepl == 0)
continue;
float invN = 1.0f / static_cast<float>(nRepl);

for (auto& t3 : poolB) {
if (!(selectionV0(t3) && checkKinematics(t1, t3))) {
continue;
}
if (collision1.index() == collision2idx) {
continue;
}

// <<< CHANGED: dedupe (t2, t3) pairs per prior collision
auto key = std::make_pair(t2.index(), t3.index());
auto& seen = seenMap[collision2idx];
if (!seen.insert(key).second) {
continue;
}

// reconstruct 4-vectors
auto proton = ROOT::Math::PtEtaPhiMVector(t3.protonPt(), t3.protonEta(), t3.protonPhi(), o2::constants::physics::MassProton);
auto lambda = ROOT::Math::PtEtaPhiMVector(t3.lambdaPt(), t3.lambdaEta(), t3.lambdaPhi(), t3.lambdaMass());
auto proton2 = ROOT::Math::PtEtaPhiMVector(t2.protonPt(), t2.protonEta(), t2.protonPhi(), o2::constants::physics::MassProton);
auto lambda2 = ROOT::Math::PtEtaPhiMVector(t2.lambdaPt(), t2.lambdaEta(), t2.lambdaPhi(), t2.lambdaMass());

float dPhi = std::fabs(RecoDecay::constrainAngle(lambda.Phi(), 0.0F, harmonic) - RecoDecay::constrainAngle(lambda2.Phi(), 0.0F, harmonic));
histos.fill(HIST("deltaPhiMix"), dPhi, invN);

if (t3.v0Status() == 0 && t2.v0Status() == 0) {
fillHistograms(0, 0, lambda, lambda2, proton, proton2, centrality, 1, invN);
}
if (t3.v0Status() == 0 && t2.v0Status() == 1) {
fillHistograms(0, 1, lambda, lambda2, proton, proton2, centrality, 1, invN);
}
if (t3.v0Status() == 1 && t2.v0Status() == 0) {
fillHistograms(1, 0, lambda2, lambda, proton2, proton, centrality, 1, invN);
}
if (t3.v0Status() == 1 && t2.v0Status() == 1) {
fillHistograms(1, 1, lambda, lambda2, proton, proton2, centrality, 1, invN);
}
}
} // end mixing-event loop
} // end same-event pair loop

auto sliced = V0s.sliceBy(tracksPerCollisionV0, collision1.index());
eventPools[bin].emplace_back(collision1.index(), std::move(sliced));
if (static_cast<int>(eventPools[bin].size()) > nEvtMixing) {
eventPools[bin].pop_front();
}
} // end primary-event loop
}
PROCESS_SWITCH(lambdaspincorrderived, processMEV2, "Process data ME", false);
};
WorkflowSpec defineDataProcessing(ConfigContext const& cfgc)
{
Expand Down
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