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[PWGLF] Added additional MC information in k892hadronphoton to study decay chains #16904

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Merged
romainschotter merged 3 commits into from
Jul 2, 2026
+113 −44
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[PWGLF] Added additional MC information in k892hadronphoton to study decay chains #16904

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059f628
Added additional MC information to study decay chains
Oussama3030 Jul 2, 2026
c052a7e
fixed MegaLinter
Oussama3030 Jul 2, 2026
d5329c2
formatting changes
Oussama3030 Jul 2, 2026
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8 changes: 6 additions & 2 deletions PWGLF/DataModel/LFSigmaTables.h
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,7 @@
DECLARE_SOA_COLUMN(X, x, float);
DECLARE_SOA_COLUMN(Y, y, float);
DECLARE_SOA_COLUMN(Z, z, float);
DECLARE_SOA_COLUMN(DCADaughters, dcadaughters, float);

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[name/o2-column] 

Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.

DECLARE_SOA_COLUMN(PhotonPx, photonPx, float);
DECLARE_SOA_COLUMN(PhotonPy, photonPy, float);
Expand All @@ -49,7 +49,7 @@
DECLARE_SOA_COLUMN(LambdaPy, lambdaPy, float);
DECLARE_SOA_COLUMN(LambdaPz, lambdaPz, float);
DECLARE_SOA_COLUMN(LambdaMass, lambdaMass, float);
DECLARE_SOA_COLUMN(AntiLambdaMass, antilambdaMass, float);

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[name/o2-column] 

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//______________________________________________________
// DYNAMIC COLUMNS
Expand Down Expand Up @@ -100,7 +100,7 @@
DECLARE_SOA_DYNAMIC_COLUMN(Radius, radius, //! Sigma0 decay radius (2D, centered at zero)
[](float x, float y) -> float { return RecoDecay::sqrtSumOfSquares(x, y); });

DECLARE_SOA_DYNAMIC_COLUMN(OPAngle, opAngle,

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[](float photonPx, float photonPy, float photonPz, float lambdaPx, float lambdaPy, float lambdaPz) {
TVector3 v1(photonPx, photonPy, photonPz);
TVector3 v2(lambdaPx, lambdaPy, lambdaPz);
Expand All @@ -113,7 +113,7 @@
return RecoDecay::sqrtSumOfSquares(photonPx, photonPy);
});

DECLARE_SOA_DYNAMIC_COLUMN(PhotonP, photonp, //! Total momentum in GeV/c

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[](float photonPx, float photonPy, float photonPz) -> float {
return RecoDecay::sqrtSumOfSquares(photonPx, photonPy, photonPz);
});
Expand All @@ -137,7 +137,7 @@
return RecoDecay::sqrtSumOfSquares(lambdaPx, lambdaPy);
});

DECLARE_SOA_DYNAMIC_COLUMN(LambdaP, lambdap, //! Total momentum in GeV/c

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Use UpperCamelCase for names of O2 columns and matching lowerCamelCase names for their getters.
[](float lambdaPx, float lambdaPy, float lambdaPz) -> float {
return RecoDecay::sqrtSumOfSquares(lambdaPx, lambdaPy, lambdaPz);
});
Expand Down Expand Up @@ -196,21 +196,21 @@
namespace kstarCore
{
DECLARE_SOA_COLUMN(PhotonV0ID, photonV0ID, int);
DECLARE_SOA_COLUMN(KShortV0ID, kshortV0ID, int);

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DECLARE_SOA_COLUMN(X, x, float);
DECLARE_SOA_COLUMN(Y, y, float);
DECLARE_SOA_COLUMN(Z, z, float);
DECLARE_SOA_COLUMN(DCADaughters, dcadaughters, float);

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DECLARE_SOA_COLUMN(PhotonPx, photonPx, float);
DECLARE_SOA_COLUMN(PhotonPy, photonPy, float);
DECLARE_SOA_COLUMN(PhotonPz, photonPz, float);
DECLARE_SOA_COLUMN(PhotonMass, photonMass, float);

DECLARE_SOA_COLUMN(KShortPx, kshortPx, float);

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DECLARE_SOA_COLUMN(KShortPy, kshortPy, float);

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DECLARE_SOA_COLUMN(KShortPz, kshortPz, float);

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DECLARE_SOA_COLUMN(KShortMass, kshortMass, float);

// Dynamic Columns
Expand Down Expand Up @@ -790,6 +790,8 @@
DECLARE_SOA_COLUMN(IsPhotonPrimary, isPhotonPrimary, bool);
DECLARE_SOA_COLUMN(PhotonPDGCode, photonPDGCode, int);
DECLARE_SOA_COLUMN(PhotonPDGCodeMother, photonPDGCodeMother, int);
DECLARE_SOA_COLUMN(PhotonPDGCodeGrandMother, photonPDGCodeGrandMother, int);
DECLARE_SOA_COLUMN(PhotonGlobalIndexGrandMother, photonGlobalIndexGrandMother, int);
DECLARE_SOA_COLUMN(PhotonIsCorrectlyAssoc, photonIsCorrectlyAssoc, bool);

DECLARE_SOA_COLUMN(KShortMCPx, kshortmcpx, float);
Expand All @@ -798,6 +800,8 @@
DECLARE_SOA_COLUMN(IsKShortPrimary, isKShortPrimary, bool);
DECLARE_SOA_COLUMN(KShortPDGCode, kshortPDGCode, int);
DECLARE_SOA_COLUMN(KShortPDGCodeMother, kshortPDGCodeMother, int);
DECLARE_SOA_COLUMN(KShortPDGCodeGrandMother, kshortPDGCodeGrandMother, int);
DECLARE_SOA_COLUMN(KShortGlobalIndexGrandMother, kshortGlobalIndexGrandMother, int);
DECLARE_SOA_COLUMN(KShortIsCorrectlyAssoc, kshortIsCorrectlyAssoc, bool);

DECLARE_SOA_DYNAMIC_COLUMN(IsKStar, isKStar, //! IsSigma0
Expand Down Expand Up @@ -903,10 +907,10 @@
kstarMCCore::MCradius, kstarMCCore::PDGCode, kstarMCCore::PDGCodeMother, kstarMCCore::MCprocess, kstarMCCore::IsProducedByGenerator,

kstarMCCore::PhotonMCPx, kstarMCCore::PhotonMCPy, kstarMCCore::PhotonMCPz,
kstarMCCore::IsPhotonPrimary, kstarMCCore::PhotonPDGCode, kstarMCCore::PhotonPDGCodeMother, kstarMCCore::PhotonIsCorrectlyAssoc,
kstarMCCore::IsPhotonPrimary, kstarMCCore::PhotonPDGCode, kstarMCCore::PhotonPDGCodeMother, kstarMCCore::PhotonPDGCodeGrandMother, kstarMCCore::PhotonGlobalIndexGrandMother, kstarMCCore::PhotonIsCorrectlyAssoc,

kstarMCCore::KShortMCPx, kstarMCCore::KShortMCPy, kstarMCCore::KShortMCPz,
kstarMCCore::IsKShortPrimary, kstarMCCore::KShortPDGCode, kstarMCCore::KShortPDGCodeMother, kstarMCCore::KShortIsCorrectlyAssoc,
kstarMCCore::IsKShortPrimary, kstarMCCore::KShortPDGCode, kstarMCCore::KShortPDGCodeMother, kstarMCCore::KShortPDGCodeGrandMother, kstarMCCore::KShortGlobalIndexGrandMother, kstarMCCore::KShortIsCorrectlyAssoc,

// Dynamic columns
kstarMCCore::IsKStar<kstarMCCore::PDGCode>,
Expand Down
66 changes: 53 additions & 13 deletions PWGLF/TableProducer/Strangeness/sigma0builder.cxx
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Expand Up @@ -811,6 +811,10 @@ struct sigma0builder {
int V02PDGCode = 0;
int V01PDGCodeMother = 0;
int V02PDGCodeMother = 0;
int V01PDGCodeGrandMother = 0;
int V02PDGCodeGrandMother = 0;
int V01GlobalIndexGrandMother = 0;
int V02GlobalIndexGrandMother = 0;
int V0PairPDGCode = 0;
int V0PairPDGCodeMother = 0;
int V0PairMCProcess = -1;
Expand Down Expand Up @@ -956,6 +960,46 @@ struct sigma0builder {
auto const& MCMother_v01 = MCMothersList_v01.front(); // First mother
auto const& MCMother_v02 = MCMothersList_v02.front(); // First mother

// Add the grandmothers
auto const& GrandMothersList_v01 = MCMother_v01.template mothers_as<aod::McParticles>();
if (!GrandMothersList_v01.empty()) {
MCinfo.V01PDGCodeGrandMother = GrandMothersList_v01.front().pdgCode();
MCinfo.V01GlobalIndexGrandMother = GrandMothersList_v01.front().globalIndex();
}

auto const& GrandMothersList_v02 = MCMother_v02.template mothers_as<aod::McParticles>();
if (!GrandMothersList_v02.empty()) {
MCinfo.V02PDGCodeGrandMother = GrandMothersList_v02.front().pdgCode();
MCinfo.V02GlobalIndexGrandMother = GrandMothersList_v02.front().globalIndex();
}

// check grandmothers and fill histograms
int kShortMotherCode = 0;
int photonMotherCode = 0;
if ((std::abs(MCParticle_v01.pdgCode()) == PDG_t::kGamma) && (std::abs(MCParticle_v02.pdgCode()) == PDG_t::kK0Short) && (!fIsKStar)) {

kShortMotherCode = MCMother_v02.pdgCode();

// If the KShort mother is a (anti)Kaon, use the grandmother instead
if (std::abs(kShortMotherCode) == PDG_t::kK0) {
auto const& kShortGrandMothers = MCMother_v02.template mothers_as<aod::McParticles>();
if (!kShortGrandMothers.empty()) {
kShortMotherCode = kShortGrandMothers.front().pdgCode();
}
}

photonMotherCode = MCMother_v01.pdgCode();
// If the photon mother is a pi0, climb to grandmother
if (std::abs(photonMotherCode) == PDG_t::kPi0) {
auto const& photonGrandMothers = MCMother_v01.template mothers_as<aod::McParticles>();
if (!photonGrandMothers.empty()) {
photonMotherCode = photonGrandMothers.front().pdgCode();
}
}

histos.fill(HIST("MCQA/h2dTrueDaughtersMatrix"), kShortMotherCode, photonMotherCode);
}

if (MCMother_v01.globalIndex() == MCMother_v02.globalIndex()) { // Is it the same mother?

MCinfo.fV0PairProducedByGenerator = MCMother_v01.producedByGenerator();
Expand Down Expand Up @@ -1330,13 +1374,11 @@ struct sigma0builder {
if (eventSelections.maxIR >= 0 && interactionRate > eventSelections.maxIR) {
return false;
}
if (fillHists)
if (fillHists) {
histos.fill(HIST("hEventSelection"), 19 /* Above max IR */);

// Fill centrality histogram after event selection
if (fillHists)
// Fill centrality histogram after event selection
histos.fill(HIST("hEventCentrality"), centrality);

}
return true;
}

Expand Down Expand Up @@ -2561,9 +2603,9 @@ struct sigma0builder {

kstarmccores(kstarMCInfo.V0PairMCRadius, kstarMCInfo.V0PairPDGCode, kstarMCInfo.V0PairPDGCodeMother, kstarMCInfo.V0PairMCProcess, kstarMCInfo.fV0PairProducedByGenerator,
kstarMCInfo.V01MCpx, kstarMCInfo.V01MCpy, kstarMCInfo.V01MCpz,
kstarMCInfo.fIsV01Primary, kstarMCInfo.V01PDGCode, kstarMCInfo.V01PDGCodeMother, kstarMCInfo.fIsV01CorrectlyAssign,
kstarMCInfo.fIsV01Primary, kstarMCInfo.V01PDGCode, kstarMCInfo.V01PDGCodeMother, kstarMCInfo.V01PDGCodeGrandMother, kstarMCInfo.V01GlobalIndexGrandMother, kstarMCInfo.fIsV01CorrectlyAssign,
kstarMCInfo.V02MCpx, kstarMCInfo.V02MCpy, kstarMCInfo.V02MCpz,
kstarMCInfo.fIsV02Primary, kstarMCInfo.V02PDGCode, kstarMCInfo.V02PDGCodeMother, kstarMCInfo.fIsV02CorrectlyAssign);
kstarMCInfo.fIsV02Primary, kstarMCInfo.V02PDGCode, kstarMCInfo.V02PDGCodeMother, kstarMCInfo.V02PDGCodeGrandMother, kstarMCInfo.V02GlobalIndexGrandMother, kstarMCInfo.fIsV02CorrectlyAssign);
}

// KStar -> stracollisions link
Expand Down Expand Up @@ -2765,9 +2807,9 @@ struct sigma0builder {
}
}

//_______________________________________________
// KStar loop
if constexpr (!soa::is_table<TEMCal>) { // Don't use EMCal clusters here
//_______________________________________________
// KStar loop
if (fillKStarTables) {
auto gamma1 = fullV0s.rawIteratorAt(bestGammasArray[i]);
for (size_t j = 0; j < bestKShortsArray.size(); ++j) {
Expand All @@ -2778,11 +2820,9 @@ struct sigma0builder {
continue;
}
}
}

//_______________________________________________
// pi0 loop
if constexpr (!soa::is_table<TEMCal>) { // Don't use EMCal clusters here
//_______________________________________________
// pi0 loop
if (fillPi0Tables) {
auto gamma1 = fullV0s.rawIteratorAt(bestGammasArray[i]);
for (size_t j = i + 1; j < bestGammasArray.size(); ++j) {
Expand Down
70 changes: 48 additions & 22 deletions PWGLF/Tasks/Resonances/k892hadronphoton.cxx
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Expand Up @@ -383,11 +383,9 @@ struct k892hadronphoton {
histos.add(histodir + "/MC/KStar/hDCAPairDauVsPt", "hDCAPairDauVsPt", kTH2D, {axisDCAdau, axisPt});

// 1/pT Resolution:
if (fillResoQAhistos && histodir == "BeforeSel") {

if (fillResoQAhistos) {
histos.add(histodir + "/MC/Reso/h2dKShortPtResolution", "h2dKShortPtResolution", kTH2D, {axisInvPt, axisDeltaPt});
histos.add(histodir + "/MC/Reso/h3dKShortPtResoVsTPCCR", "h3dKShortPtResoVsTPCCR", kTH3D, {axisInvPt, axisDeltaPt, axisTPCrows});
histos.add(histodir + "/MC/Reso/h3dKShortPtResoVsTPCCR", "h3dKShortPtResoVsTPCCR", kTH3D, {axisInvPt, axisDeltaPt, axisTPCrows});
histos.add(histodir + "/MC/Reso/h2dGammaPtResolution", "h2dGammaPtResolution", kTH2D, {axisInvPt, axisDeltaPt});
histos.add(histodir + "/MC/Reso/h2dKStarPtResolution", "h2dKStarPtResolution", kTH2D, {axisInvPt, axisDeltaPt});
histos.add(histodir + "/MC/Reso/h2dKStarRadiusResolution", "h2dKStarRadiusResolution", kTH2D, {axisPt, axisDeltaPt});
}
Expand All @@ -396,10 +394,16 @@ struct k892hadronphoton {
if (fillBkgQAhistos) {
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_All", "h2dPtVsMassKStar_All", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_TrueDaughters", "h2dPtVsMassKStar_TrueDaughters", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dTrueDaughtersMatrix", "h2dTrueDaughtersMatrix", kTHnSparseD, {{10001, -5000.5f, +5000.5f}, {10001, -5000.5f, +5000.5f}});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_PhotonOmega", "h2dPtVsMassKStar_PhotonOmega", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_PhotonRho", "h2dPtVsMassKStar_PhotonRho", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_PhotonEta", "h2dPtVsMassKStar_PhotonEta", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_KShortKCharged", "h2dPtVsMassKStar_KShortKCharged", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_KStarPionKaon", "h2dPtVsMassKStar_KStarPionKaon", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_TrueGammaFakeKShort", "h2dPtVsMassKStar_TrueGammaFakeKShort", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_FakeGammaTrueKShort", "h2dPtVsMassKStar_FakeGammaTrueKShort", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dPtVsMassKStar_FakeDaughters", "h2dPtVsMassKStar_FakeDaughters", kTH2D, {axisPt, axisKStarMass});
histos.add(histodir + "/MC/BkgStudy/h2dTrueDaughtersMatrix", "h2dTrueDaughtersMatrix", kTHnSparseD, {{10001, -5000.5f, +5000.5f}, {10001, -5000.5f, +5000.5f}});
histos.add(histodir + "/MC/BkgStudy/h2dTrueDaughtersMatrixGrandMother", "h2dTrueDaughtersMatrixGrandMother", kTHnSparseD, {{10001, -5000.5f, +5000.5f}, {10001, -5000.5f, +5000.5f}});
}
}
}
Expand Down Expand Up @@ -575,12 +579,12 @@ struct k892hadronphoton {
if (eventSelections.maxIR >= 0 && interactionRate > eventSelections.maxIR) {
return false;
}
if (fillHists)
histos.fill(HIST("hEventSelection"), 19 /* Above max IR */);

// Fill centrality histogram after event selection
if (fillHists)
if (fillHists) {
histos.fill(HIST("hEventSelection"), 19 /* Above max IR */);
// Fill centrality histogram after event selection
histos.fill(HIST("hEventCentrality"), centrality);
}

return true;
}
Expand Down Expand Up @@ -761,36 +765,36 @@ struct k892hadronphoton {
return trkCode;
}

template <typename TKStarObject>
template <int mode, typename TKStarObject>
void getResolution(TKStarObject const& kstar)
{
// Check whether it is before or after selections
static constexpr std::string_view MainDir[] = {"BeforeSel", "AfterSel"};

//_______________________________________
// Gamma MC association
if (std::abs(kstar.photonPDGCode()) == PDG_t::kGamma) {
if (kstar.photonmcpt() > 0) {
histos.fill(HIST("BeforeSel/MC/Reso/h3dGammaPtResoVsTPCCR"), 1.f / kstar.kshortmcpt(), 1.f / kstar.kshortPt() - 1.f / kstar.kshortmcpt(), -1 * kstar.photonNegTPCCrossedRows()); // 1/pT resolution
histos.fill(HIST("BeforeSel/MC/Reso/h3dGammaPtResoVsTPCCR"), 1.f / kstar.kshortmcpt(), 1.f / kstar.kshortPt() - 1.f / kstar.kshortmcpt(), kstar.photonPosTPCCrossedRows()); // 1/pT resolution
histos.fill(HIST("BeforeSel/MC/Reso/h2dGammaPtResolution"), 1.f / kstar.photonmcpt(), 1.f / kstar.photonPt() - 1.f / kstar.photonmcpt()); // pT resolution
// histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dGammaPtResolution"), 1.f / kstar.photonmcpt(), kstar.photonPt() - kstar.photonmcpt());
histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dGammaPtResolution"), 1.f / kstar.photonmcpt(), (kstar.photonPt() - kstar.photonmcpt()) / kstar.photonmcpt());
}
}

//_______________________________________
// KShort MC association
if (std::abs(kstar.kshortPDGCode()) == PDG_t::kK0Short) {
if (kstar.kshortmcpt() > 0) {
histos.fill(HIST("BeforeSel/MC/Reso/h2dKShortPtResolution"), 1.f / kstar.kshortmcpt(), 1.f / kstar.kshortPt() - 1.f / kstar.kshortmcpt()); // 1/pT resolution
histos.fill(HIST("BeforeSel/MC/Reso/h3dKShortPtResoVsTPCCR"), 1.f / kstar.kshortmcpt(), 1.f / kstar.kshortPt() - 1.f / kstar.kshortmcpt(), -1 * kstar.kshortNegTPCCrossedRows()); // 1/pT resolution
histos.fill(HIST("BeforeSel/MC/Reso/h3dKShortPtResoVsTPCCR"), 1.f / kstar.kshortmcpt(), 1.f / kstar.kshortPt() - 1.f / kstar.kshortmcpt(), kstar.kshortPosTPCCrossedRows()); // 1/pT resolution
// histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dKShortPtResolution"), 1.f / kstar.kshortmcpt(), kstar.kshortPt() - kstar.kshortmcpt());
histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dKShortPtResolution"), 1.f / kstar.kshortmcpt(), (kstar.kshortPt() - kstar.kshortmcpt()) / kstar.kshortmcpt());
}
}

//_______________________________________
// KStar MC association
if (kstar.isKStar()) {
histos.fill(HIST("BeforeSel/MC/Reso/h2dKStarRadiusResolution"), kstar.mcpt(), kstar.radius() - kstar.mcradius()); // pT resolution
histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dKStarRadiusResolution"), kstar.mcpt(), kstar.radius() - kstar.mcradius()); // pT resolution
if (kstar.mcpt() > 0)
histos.fill(HIST("BeforeSel/MC/Reso/h2dKStarPtResolution"), 1.f / kstar.mcpt(), 1.f / kstar.pt() - 1.f / kstar.mcpt()); // pT resolution
histos.fill(HIST(MainDir[mode]) + HIST("/MC/Reso/h2dKStarPtResolution"), 1.f / kstar.mcpt(), (1.f / kstar.pt() - 1.f / kstar.mcpt()) / (1.f / kstar.mcpt())); // pT resolution
}
}

Expand All @@ -804,18 +808,40 @@ struct k892hadronphoton {
bool fIsKStar = kstar.isKStar();
int photonPDGCode = kstar.photonPDGCode();
int photonPDGCodeMother = kstar.photonPDGCodeMother();
int photonPDGCodeGrandMother = kstar.photonPDGCodeGrandMother();
int photonGlobalIndexGrandMother = kstar.photonGlobalIndexGrandMother();
int kshortPDGCode = kstar.kshortPDGCode();
int kshortPDGCodeMother = kstar.kshortPDGCodeMother();
int kshortPDGCodeGrandMother = kstar.kshortPDGCodeGrandMother();
int kshortGlobalIndexGrandMother = kstar.kshortGlobalIndexGrandMother();
float kstarpT = kstar.pt();
float kstarMass = kstar.kstarMass();

histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_All"), kstarpT, kstarMass);

//_______________________________________
// Real Gamma x Real KShort - but not from the same kstar!
if ((!fIsKStar)) { //(std::abs(photonPDGCode) == PDG_t::kGamma) && (std::abs(KShortPDGCode) == PDG_t::kK0Short) &&
// Real Gamma x Real KShort - but not direct decays from the same kstar!
if ((!fIsKStar) && (std::abs(photonPDGCode) == PDG_t::kGamma) && (std::abs(kshortPDGCode) == PDG_t::kK0Short)) {
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_TrueDaughters"), kstarpT, kstarMass);
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dTrueDaughtersMatrix"), kshortPDGCodeMother, photonPDGCodeMother);
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dTrueDaughtersMatrixGrandMother"), kshortPDGCodeGrandMother, photonPDGCodeGrandMother);

// coming from the same kstar (coupled), but via a different decay channel (K* -> K0 pi0 -> K0s gamma)
if (std::abs(kshortPDGCodeGrandMother) == o2::constants::physics::Pdg::kK0Star892 && std::abs(photonPDGCodeGrandMother) == o2::constants::physics::Pdg::kK0Star892 && (photonGlobalIndexGrandMother == kshortGlobalIndexGrandMother)) // K*(892)0
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_KStarPionKaon"), kstarpT, kstarMass);

// Break down of different photon / kshort sources
if (std::abs(photonPDGCodeGrandMother) == o2::constants::physics::Pdg::kOmega) // omega(782)
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_PhotonOmega"), kstarpT, kstarMass);

if (std::abs(photonPDGCodeGrandMother) == PDG_t::kRho770Plus) // rho+-(770)
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_PhotonRho"), kstarpT, kstarMass);

if (std::abs(photonPDGCodeMother) == o2::constants::physics::Pdg::kEta) // eta
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_PhotonEta"), kstarpT, kstarMass);

if (std::abs(kshortPDGCodeGrandMother) == o2::constants::physics::Pdg::kKPlusStar892) // K*(892)+-
histos.fill(HIST(MainDir[mode]) + HIST("/MC/BkgStudy/h2dPtVsMassKStar_KShortKCharged"), kstarpT, kstarMass);
}

//_______________________________________
Expand Down Expand Up @@ -978,8 +1004,8 @@ struct k892hadronphoton {

//_______________________________________
// pT resolution histos
if ((mode == 0) && fillResoQAhistos)
getResolution(kstar);
if (fillResoQAhistos)
getResolution<mode>(kstar);
}
}
}
Expand Down
13 changes: 6 additions & 7 deletions PWGLF/Tasks/Resonances/k892hadronphotonBkg.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@ struct k892hadronphotonBkg {
Configurable<float> kstarMaxRap{"kstarMaxRap", 0.5f, "Max |y(K*)|"};
Configurable<int> nBkgRot{"nBkgRot", 3, "Rotations per pair (rotational bkg)"};
Configurable<int> rotationalCut{"rotationalCut", 10, "theta band: [pi - pi/cut, pi + pi/cut]"};
Configurable<float> rotationalFactor{"rotationalFactor", 1.f, "Factor to scale the angle of rotation (rotationalFactor * PI)"};
} kstarBkgConfig;

ConfigurableAxis axisVertexMixBkg{"axisVertexMixBkg", {VARIABLE_WIDTH, -10.f, -8.f, -6.f, -4.f, -2.f, 0.f, 2.f, 4.f, 6.f, 8.f, 10.f}, "z-vertex bins for mixing"};
Expand Down Expand Up @@ -385,13 +386,11 @@ struct k892hadronphotonBkg {
if (eventSelections.maxIR >= 0 && interactionRate > eventSelections.maxIR) {
return false;
}
if (fillHists)
if (fillHists) {
histos.fill(HIST("hEventSelection"), 19 /* Above max IR */);

// Fill centrality histogram after event selection
if (fillHists)
// Fill centrality histogram after event selection
histos.fill(HIST("hEventCentrality"), centrality);

}
return true;
}

Expand Down Expand Up @@ -595,8 +594,8 @@ struct k892hadronphotonBkg {
0.0);

for (int irot = 0; irot < kstarBkgConfig.nBkgRot; ++irot) {
float theta = rotRng.Uniform(o2::constants::math::PI - o2::constants::math::PI / kstarBkgConfig.rotationalCut,
o2::constants::math::PI + o2::constants::math::PI / kstarBkgConfig.rotationalCut);
float theta = rotRng.Uniform(kstarBkgConfig.rotationalFactor * o2::constants::math::PI - o2::constants::math::PI / kstarBkgConfig.rotationalCut,
kstarBkgConfig.rotationalFactor * o2::constants::math::PI + o2::constants::math::PI / kstarBkgConfig.rotationalCut);

ROOT::Math::PtEtaPhiMVector kRot(kshort.pt(), kshort.eta(), kshort.phi() + theta, o2::constants::physics::MassK0Short);

Expand Down
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