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[PWGLF] Fixed reconstruction part of KstarInOO.cxx #13283

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Merged
dmallick2 merged 1 commit into from
Oct 10, 2025
Merged

[PWGLF] Fixed reconstruction part of KstarInOO.cxx #13283

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186 changes: 141 additions & 45 deletions PWGLF/Tasks/Resonances/kstarInOO.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@
#include <Framework/OutputObjHeader.h>
#include <Framework/runDataProcessing.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 <TMathBase.h>
#include <TVector2.h>
Expand All @@ -44,7 +44,7 @@
#include <cmath>
#include <cstddef>
#include <cstdlib>
#include <iostream>

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[include-iostream] 

Do not include iostream. Use O2 logging instead.
#include <string>
#include <utility>
#include <vector>
Expand Down Expand Up @@ -179,21 +179,25 @@
}

if (cfgMcHistos) {
histos.add("hPion_PID_Purity", "hPion_PID_Purity", kTH1F, {{3, -1.5, 1.5}});
histos.add("hKaon_PID_Purity", "hKaon_PID_Purity", kTH1F, {{3, -1.5, 1.5}});
histos.add("hSimplePion_PID_Purity", "hSimplePion_PID_Purity", kTH1F, {{3, -1.5, 1.5}});
histos.add("hSimpleKaon_PID_Purity", "hSimpleKaon_PID_Purity", kTH1F, {{3, -1.5, 1.5}});

histos.add("nEvents_MC", "nEvents_MC", kTH1F, {{4, 0.0, 4.0}});
histos.add("nEvents_MC_True", "nEvents_MC_True", kTH1F, {{4, 0.0, 4.0}});

histos.add("hMC_USS", "hMC_USS", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS", "hMC_LSS", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_Mix", "hMC_USS_Mix", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS_Mix", "hMC_LSS_Mix", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_True", "hMC_USS_True", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_kstar_True", "hMC_kstar_True", kTHnSparseF, {cfgCentAxis, ptAxis});

histos.add("hMC_USS_pion", "hMC_USS_pion", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS_pion", "hMC_LSS_pion", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_Mix_pion", "hMC_USS_Mix_pion", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS_Mix_pion", "hMC_LSS_Mix_pion", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_pion_True", "hMC_USS_pion_True", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_True", "hMC_USS_True", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_KPi", "hMC_USS_KPi", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_PiK", "hMC_USS_PiK", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS_KPi", "hMC_LSS_KPi", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_LSS_PiK", "hMC_LSS_PiK", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_KPi_Mix", "hMC_USS_KPi_Mix", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_PiK_Mix", "hMC_USS_PiK_Mix", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_KPi_True", "hMC_USS_KPi_True", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
histos.add("hMC_USS_PiK_True", "hMC_USS_PiK_True", kTHnSparseF, {cfgCentAxis, ptAxis, minvAxis});
}
} // end of init

Expand Down Expand Up @@ -226,7 +230,6 @@
histos.fill(HIST("hPosZ_BC"), event.posZ());
histos.fill(HIST("hcentFT0C_BC"), event.centFT0C());
}

if (!event.sel8())
return false;
if (std::abs(event.posZ()) > cfgEventVtxCut)
Expand Down Expand Up @@ -264,6 +267,7 @@
histos.fill(HIST("hTPCChi2_BC"), track.tpcChi2NCl());
histos.fill(HIST("QA_track_pT_BC"), track.pt());
}

if (cfgTrackGlobalSel && !track.isGlobalTrack())
return false;
if (track.pt() < cfgTrackMinPt)
Expand All @@ -278,11 +282,11 @@
return false;
if (cfgTrackGlobalWoDCATrack && !track.isGlobalTrackWoDCA())
return false;
if (track.tpcNClsFindable() < cfgTracknFindableTPCClusters)
if (cfgTracknFindableTPCClusters > 0 && track.tpcNClsFindable() < cfgTracknFindableTPCClusters)
return false;
if (track.tpcNClsCrossedRows() < cfgTracknTPCCrossedRows)
return false;
if (track.tpcCrossedRowsOverFindableCls() > cfgTracknRowsOverFindable)
if (cfgTracknRowsOverFindable > 0 && track.tpcCrossedRowsOverFindableCls() > cfgTracknRowsOverFindable)
return false;
if (track.tpcChi2NCl() > cfgTracknTPCChi2)
return false;
Expand Down Expand Up @@ -358,7 +362,7 @@
} else {
tofPIDPassed = true;
}
// TPC & TOF
// TPC & TOF
if (tpcPIDPassed && tofPIDPassed) {
if (cfgTrackCutQA && QA) {
histos.fill(HIST("QA_nSigma_pion_TPC_AC"), candidate.pt(), candidate.tpcNSigmaPi());
Expand All @@ -378,10 +382,8 @@
auto centrality = collision1.centFT0C();

for (const auto& [trk1, trk2] : combinations(o2::soa::CombinationsFullIndexPolicy(tracks1, tracks2))) {
if (std::fabs(trk1.signed1Pt()) <= 0.f || std::fabs(trk2.signed1Pt()) <= 0.f)
continue;

auto [KstarPt, Minv] = minvReconstruction(trk1, trk2, QA);
auto [KstarPt, Minv] = minvReconstruction(trk1, trk2, QA, false);

double conjugate = trk1.sign() * trk2.sign();
if (cfgDataHistos) {
Expand Down Expand Up @@ -411,43 +413,49 @@
auto tracks2 = pionMC->sliceByCached(aod::track::collisionId, collision2.globalIndex(), cache);
auto centrality = collision1.centFT0C();

std::vector<int> mcMemory;
std::vector<int> PIDPurityKey_Kaon;
std::vector<int> PIDPurityKey_Pion;

double KstarPt_Kpi, Minv_Kpi;

for (const auto& [trk1, trk2] : combinations(o2::soa::CombinationsFullIndexPolicy(tracks1, tracks2))) {
if (!trk1.has_mcParticle() || !trk2.has_mcParticle())
continue;
if (std::fabs(trk1.signed1Pt()) <= 0.f || std::fabs(trk2.signed1Pt()) <= 0.f)

// auto [KstarPt_Kpi, Minv_Kpi] = minvReconstruction(trk1, trk2, QA, false);
// auto [KstarPt_piK, Minv_piK] = minvReconstruction(trk1, trk2, QA, true);

std::tie(KstarPt_Kpi, Minv_Kpi) = minvReconstruction(trk1, trk2, QA, false);
std::tie(KstarPt_Kpi, Minv_Kpi) = minvReconstruction(trk1, trk2, QA, true);

if (Minv_Kpi < 0)
continue;
auto [KstarPt_Kpi, Minv_Kpi] = minvReconstruction(trk1, trk2, QA);

double conjugate = trk1.sign() * trk2.sign();
if (cfgMcHistos) {
if (Minv_Kpi > 0) {
if (!IsMix) {
if (conjugate < 0) {
histos.fill(HIST("hMC_USS"), centrality, KstarPt_Kpi, Minv_Kpi);
} else if (conjugate > 0) {
histos.fill(HIST("hMC_LSS"), centrality, KstarPt_Kpi, Minv_Kpi);
}
} else {
if (conjugate < 0) {
histos.fill(HIST("hMC_USS_Mix"), centrality, KstarPt_Kpi, Minv_Kpi);
} else if (conjugate > 0) {
histos.fill(HIST("hMC_LSS_Mix"), centrality, KstarPt_Kpi, Minv_Kpi);
}
if (!IsMix) {
if (conjugate < 0) {
histos.fill(HIST("hMC_USS_KPi"), centrality, KstarPt_Kpi, Minv_Kpi);
} else if (conjugate > 0) {
histos.fill(HIST("hMC_LSS_KPi"), centrality, KstarPt_Kpi, Minv_Kpi);
}
} else {
if (conjugate < 0) {
histos.fill(HIST("hMC_USS_KPi_Mix"), centrality, KstarPt_Kpi, Minv_Kpi);
}
}
}
//======================
// Gen MC
auto particle1 = trk1.mcParticle();
auto particle2 = trk2.mcParticle();
if (std::fabs(particle1.pdgCode()) != 321)
continue; // Not Kaon
if (std::fabs(particle2.pdgCode()) != 211)
continue; // Not Pion

if (!particle1.has_mothers() || !particle2.has_mothers()) {
continue;
}
int mcindex1 = trk1.globalIndex();
int mcindex2 = trk2.globalIndex();

std::vector<int> mothers1{};
std::vector<int> mothers1PDG{};
Expand All @@ -463,35 +471,93 @@
mothers2PDG.push_back(particle2_mom.pdgCode());
}

if (mothers1PDG[0] != 313)

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
continue; // mother not K*0
if (mothers2PDG[0] != 313)

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
continue; // mothers not K*0

if (mothers1[0] != mothers2[0])
continue; // Kaon and pion not from the same K*0

if (std::fabs(particle1.pdgCode()) != 211 && std::fabs(particle1.pdgCode()) != 321)

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
continue;
if (std::fabs(particle2.pdgCode()) != 211 && std::fabs(particle2.pdgCode()) != 321)

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
continue;

double track1_mass, track2_mass;
bool track1f{false}; // true means pion

if (std::fabs(particle1.pdgCode()) == 211) {

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[pdg/explicit-code] 

Avoid hard-coded PDG codes. Use named values from PDG_t or o2::constants::physics::Pdg instead.
track1f = true;
track1_mass = massPi;
} else {
track1_mass = massKa;
}

if (std::fabs(particle2.pdgCode()) == 211) {
track2_mass = massPi;
} else {
track2_mass = massKa;
}

if (track1_mass == track2_mass) {
return;
}

bool exists1 = std::find(mcMemory.begin(), mcMemory.end(), mcindex1) != mcMemory.end();
bool exists2 = std::find(mcMemory.begin(), mcMemory.end(), mcindex2) != mcMemory.end();
if (exists1 || exists2) {
continue;
} else {
mcMemory.push_back(trk1.globalIndex());
mcMemory.push_back(trk2.globalIndex());
}

TLorentzVector lDecayDaughter1, lDecayDaughter2, lResonance;

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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.
lDecayDaughter1.SetXYZM(trk1.px(), trk1.py(), trk1.pz(), track1_mass);
lDecayDaughter2.SetXYZM(trk2.px(), trk2.py(), trk2.pz(), track2_mass);
lResonance = lDecayDaughter1 + lDecayDaughter2;

if (cfgMcHistos) {
histos.fill(HIST("hMC_USS_True"), centrality, KstarPt_Kpi, Minv_Kpi);
histos.fill(HIST("hMC_USS_True"), centrality, lResonance.Pt(), lResonance.M());
if (track1f) {
histos.fill(HIST("hMC_USS_PiK_True"), centrality, lResonance.Pt(), lResonance.M());
} else {
histos.fill(HIST("hMC_USS_KPi_True"), centrality, lResonance.Pt(), lResonance.M());
}
}
//======================
} // for
} // TrackSlicingMC

template <typename TracksType>
std::pair<double, double> minvReconstruction(const TracksType& trk1, const TracksType& trk2, const bool QA)
std::pair<double, double> minvReconstruction(const TracksType& trk1, const TracksType& trk2, const bool QA, const bool flip)
{
if (!trackSelection(trk1, false) || !trackSelection(trk2, false))
return {-1.0, -1.0};
if (!trackPIDKaon(trk1, QA) || !trackPIDPion(trk2, QA))
return {-1.0, -1.0};
if (trk1.globalIndex() == trk2.globalIndex())

if (!flip) {
if (!trackPIDKaon(trk1, QA) || !trackPIDPion(trk2, QA)) {
return {-1.0, -1.0};
}
} else {
if (!trackPIDPion(trk1, false) || !trackPIDKaon(trk2, false))
return {-1.0, -1.0};
}

// if (trk1.globalIndex() == trk2.globalIndex())
// return {-1.0, -1.0};
if (trk1.index() >= trk2.index())
return {-1.0, -1.0};

TLorentzVector lDecayDaughter1, lDecayDaughter2, lResonance;

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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.

lDecayDaughter1.SetXYZM(trk1.px(), trk1.py(), trk1.pz(), massKa);
lDecayDaughter2.SetXYZM(trk2.px(), trk2.py(), trk2.pz(), massPi);
if (!flip) {
lDecayDaughter1.SetXYZM(trk1.px(), trk1.py(), trk1.pz(), massKa);
lDecayDaughter2.SetXYZM(trk2.px(), trk2.py(), trk2.pz(), massPi);
} else {
lDecayDaughter1.SetXYZM(trk1.px(), trk1.py(), trk1.pz(), massPi);
lDecayDaughter2.SetXYZM(trk2.px(), trk2.py(), trk2.pz(), massKa);
}
lResonance = lDecayDaughter1 + lDecayDaughter2;

if (std::abs(lResonance.Eta()) > cfgTrackMaxEta)
Expand Down Expand Up @@ -573,7 +639,7 @@
//|
//| MC STUFF (SE)
//|
//=======================================================
//=========================================================
int nEventsMC = 0;
void processSameEventMC(EventCandidates::iterator const& collision, TrackCandidatesMC const& tracks, aod::McParticles const&)
{
Expand Down Expand Up @@ -603,6 +669,36 @@
if (!INELgt0)
return;

auto tracks1 = kaonMC->sliceByCached(aod::track::collisionId, collision.globalIndex(), cache);
for (const auto& kaon : tracks1) {
if (!trackSelection(kaon, false))
continue;
if (!trackPIDKaon(kaon, false))
continue;
auto particle1 = kaon.mcParticle();
if (std::fabs(particle1.pdgCode()) == 321)
histos.fill(HIST("hSimpleKaon_PID_Purity"), 1); // histogram with two bins, -1.5, 1.5 fill 1 or -1
else if (std::fabs(particle1.pdgCode()) == 211)
histos.fill(HIST("hSimpleKaon_PID_Purity"), -1); // histogram with two bins, -1.5, 1.5 fill 1 or -1
else
histos.fill(HIST("hSimpleKaon_PID_Purity"), 0); // histogram with two bins, -1.5, 1.5 fill 1 or -1
}

auto tracks2 = pionMC->sliceByCached(aod::track::collisionId, collision.globalIndex(), cache);
for (const auto& pion : tracks2) {
if (!trackSelection(pion, false))
continue;
if (!trackPIDPion(pion, false))
continue;
auto particle2 = pion.mcParticle();
if (std::fabs(particle2.pdgCode()) == 211)
histos.fill(HIST("hSimplePion_PID_Purity"), 1); // histogram with two bins, -1.5, 1.5 fill 1 or -1
else if (std::fabs(particle2.pdgCode()) == 321)
histos.fill(HIST("hSimplePion_PID_Purity"), -1); // histogram with two bins, -1.5, 1.5 fill 1 or -1
else
histos.fill(HIST("hSimplePion_PID_Purity"), 0); // histogram with two bins, -1.5, 1.5 fill 1 or -1
}

if (cfgMcHistos) {
histos.fill(HIST("nEvents_MC"), 1.5);
}
Expand Down Expand Up @@ -651,7 +747,7 @@
++nEventsTrue;
}

if (fabs(collision.posZ()) > cfgEventVtxCut)

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[std-prefix] 

Use std:: prefix for names from the std namespace.
return;
if (recocolls.size() <= 0) { // not reconstructed
if (cfgForceGenReco) {
Expand Down
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