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[PWGCF] Apply FT0 amplitude cut for QA #14348

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[PWGCF] Apply FT0 amplitude cut for QA #14348

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42eef56
Refine efficiency correction
abmodak Dec 19, 2025
60944b8
Merge branch 'AliceO2Group:master' into master
abmodak Dec 25, 2025
974f86b
Apply FT0 amplitude cut for QA
abmodak Dec 25, 2025
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21 changes: 21 additions & 0 deletions PWGCF/TwoParticleCorrelations/Tasks/longrangecorrDerived.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -91,6 +91,9 @@ struct LongrangecorrDerived {
Configurable<float> cfgZdcCut{"cfgZdcCut", 0.1f, "ZDC threshold"};
Configurable<int> cfgGapSideCut{"cfgGapSideCut", 0, "Gap-side A=0, C=1, AC = 2, No Gap = -1, All events = 3"};

Configurable<bool> isApplyAmpCut{"isApplyAmpCut", false, "Enable FT0 amplitude cut"};
Configurable<float> cfgLowAmpCut{"cfgLowAmpCut", 2.0f, "Low FT0 amplitude cut"};

ConfigurableAxis axisMultiplicity{"axisMultiplicity", {VARIABLE_WIDTH, 0, 10, 15, 25, 50, 60, 1000}, "multiplicity axis"};
ConfigurableAxis axisPhi{"axisPhi", {96, 0, TwoPI}, "#phi axis"};
ConfigurableAxis axisEtaTrig{"axisEtaTrig", {40, -1., 1.}, "#eta trig axis"};
Expand All @@ -101,6 +104,8 @@ struct LongrangecorrDerived {
ConfigurableAxis axisDeltaPhi{"axisDeltaPhi", {72, -PIHalf, PIHalf * 3}, "delta phi axis for histograms"};
ConfigurableAxis axisDeltaEta{"axisDeltaEta", {40, -6, -2}, "delta eta axis for histograms"};
ConfigurableAxis axisInvMass{"axisInvMass", {VARIABLE_WIDTH, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95, 2.0}, "invariant mass axis"};
ConfigurableAxis axisInvMassQA{"axisInvMassQA", {20, 0.45, 0.55}, "invariant mass axis for QA"};
ConfigurableAxis axisAmplitude{"axisAmplitude", {5000, 0, 10000}, "FT0 amplitude"};
ConfigurableAxis axisMultME{"axisMultME", {VARIABLE_WIDTH, 0, 5, 10, 20, 30, 40, 50, 1000}, "Mixing bins - multiplicity"};
ConfigurableAxis axisVtxZME{"axisVtxZME", {VARIABLE_WIDTH, -10, -8, -6, -4, -2, 0, 2, 4, 6, 8, 10}, "Mixing bins - z-vertex"};

Expand Down Expand Up @@ -168,12 +173,14 @@ struct LongrangecorrDerived {
histos.add("Trig_phi", "Trig_phi", kTH1D, {axisPhi});
histos.add("Trig_etavsphi", "Trig_etavsphi", kTH2D, {axisPhi, axisEtaTrig});
histos.add("Trig_pt", "Trig_pt", kTH1D, {axisPtTrigger});
histos.add("Trig_invMass", "Trig_invMass", kTH1D, {axisInvMassQA});
histos.add("Trig_hist", "Trig_hist", kTHnSparseF, {axisVtxZ, axisMultiplicity, axisPtTrigger, axisInvMass});

histos.add("Assoc_eta", "Assoc_eta", kTH1D, {axisEtaAssoc});
histos.add("Assoc_phi", "Assoc_phi", kTH1D, {axisPhi});
histos.add("Assoc_etavsphi", "Assoc_etavsphi", kTH2D, {axisPhi, axisEtaAssoc});
histos.add("Assoc_pt", "Assoc_pt", kTH1D, {axisPtAssoc});
histos.add("Assoc_amp", "Assoc_amp", kTH1D, {axisAmplitude});

histos.add("deltaEta_deltaPhi_same", "", kTH2D, {axisDeltaPhi, axisDeltaEta});
histos.add("deltaEta_deltaPhi_mixed", "", kTH2D, {axisDeltaPhi, axisDeltaEta});
Expand All @@ -193,6 +200,9 @@ struct LongrangecorrDerived {
histos.fill(HIST("Trig_eta"), track.eta());
histos.fill(HIST("Trig_phi"), track.phi());
histos.fill(HIST("Trig_pt"), track.pt());
if constexpr (std::experimental::is_detected<HasInvMass, TTrack>::value) {
histos.fill(HIST("Trig_invMass"), track.invMass());
}
}

template <typename TTrack>
Expand All @@ -201,6 +211,11 @@ struct LongrangecorrDerived {
histos.fill(HIST("Assoc_etavsphi"), track.phi(), track.eta());
histos.fill(HIST("Assoc_eta"), track.eta());
histos.fill(HIST("Assoc_phi"), track.phi());
if constexpr (std::experimental::is_detected<HasFt0, TTrack>::value) {
histos.fill(HIST("Assoc_amp"), track.amplitude());
} else {
histos.fill(HIST("Assoc_pt"), track.pt());
}
}

template <bool fillHist = true, typename CheckCol>
Expand Down Expand Up @@ -229,6 +244,8 @@ struct LongrangecorrDerived {
using HasInvMass = decltype(std::declval<T&>().invMass());
template <class T>
using HasUpc = decltype(std::declval<T&>().gapSide());
template <class T>
using HasFt0 = decltype(std::declval<T&>().channelID());

template <CorrelationContainer::CFStep step, typename TTarget, typename TTriggers, typename TAssocs>
void fillCorrHist(TTarget target, TTriggers const& triggers, TAssocs const& assocs, bool mixing, float vz, float multiplicity, float eventWeight)
Expand All @@ -250,6 +267,10 @@ struct LongrangecorrDerived {
}
}
for (auto const& assoTrack : assocs) {
if constexpr (std::experimental::is_detected<HasFt0, typename TAssocs::iterator>::value) {
if (isApplyAmpCut && (assoTrack.amplitude() < cfgLowAmpCut))
continue;
}
float deltaPhi = RecoDecay::constrainAngle(triggerTrack.phi() - assoTrack.phi(), -PIHalf);
float deltaEta = triggerTrack.eta() - assoTrack.eta();
if (!mixing) {
Expand Down
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