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[PWGCF] fix mixed event for FT0A-C, add eta-phi for QA #13462

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Merged
victor-gonzalez merged 1 commit into from
Oct 20, 2025
Merged

[PWGCF] fix mixed event for FT0A-C, add eta-phi for QA #13462

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28 changes: 20 additions & 8 deletions PWGCF/TwoParticleCorrelations/Tasks/longRangeDihadronCor.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,7 @@ struct LongRangeDihadronCor {
O2_DEFINE_CONFIGURABLE(cfgCentralityWeight, std::string, "", "CCDB path to centrality weight object")
O2_DEFINE_CONFIGURABLE(cfgLocalEfficiency, bool, false, "Use local efficiency object")
O2_DEFINE_CONFIGURABLE(cfgUseEventWeights, bool, false, "Use event weights for mixed event")
O2_DEFINE_CONFIGURABLE(cfgDrawEtaPhiDis, bool, false, "draw eta-phi distribution for detectors in used")
struct : ConfigurableGroup {
O2_DEFINE_CONFIGURABLE(cfgMultCentHighCutFunction, std::string, "[0] + [1]*x + [2]*x*x + [3]*x*x*x + [4]*x*x*x*x + 10.*([5] + [6]*x + [7]*x*x + [8]*x*x*x + [9]*x*x*x*x)", "Functional for multiplicity correlation cut");
O2_DEFINE_CONFIGURABLE(cfgMultCentLowCutFunction, std::string, "[0] + [1]*x + [2]*x*x + [3]*x*x*x + [4]*x*x*x*x - 3.*([5] + [6]*x + [7]*x*x + [8]*x*x*x + [9]*x*x*x*x)", "Functional for multiplicity correlation cut");
Expand Down Expand Up @@ -208,6 +209,7 @@ struct LongRangeDihadronCor {
}
const AxisSpec axisPhi{72, 0.0, constants::math::TwoPI, "#varphi"};
const AxisSpec axisEta{40, -1., 1., "#eta"};
const AxisSpec axisEtaFull{90, -4., 5., "#eta"};

ccdb->setURL("http://alice-ccdb.cern.ch");
ccdb->setCaching(true);
Expand Down Expand Up @@ -281,6 +283,9 @@ struct LongRangeDihadronCor {
registry.add("zVtx_used", "zVtx_used", {HistType::kTH1D, {axisVertex}});
registry.add("FT0Amp", "", {HistType::kTH2F, {axisChID, axisFit}});
registry.add("FT0AmpCorrect", "", {HistType::kTH2F, {axisChID, axisFit}});
if (cfgDrawEtaPhiDis) {
registry.add("EtaPhi", "", {HistType::kTH2F, {axisEtaFull, axisPhi}});
}
}
if (doprocessSameTpcFt0a) {
registry.add("deltaEta_deltaPhi_same_TPC_FT0A", "", {HistType::kTH2D, {axisDeltaPhi, axisDeltaEtaTpcFt0a}}); // check to see the delta eta and delta phi distribution
Expand Down Expand Up @@ -561,6 +566,9 @@ struct LongRangeDihadronCor {
} else if (corType == kFT0A) {
registry.fill(HIST("Trig_hist_TPC_FT0A"), fSampleIndex, posZ, track1.pt(), eventWeight * triggerWeight);
}
if (cfgDrawEtaPhiDis && corType == kFT0A) {
registry.fill(HIST("EtaPhi"), track1.eta(), track1.phi(), eventWeight * triggerWeight);
}
}

std::size_t channelSize = 0;
Expand All @@ -577,6 +585,9 @@ struct LongRangeDihadronCor {
getChannel(ft0, iCh, chanelid, ampl, corType);
auto phi = getPhiFT0(chanelid, corType);
auto eta = getEtaFT0(chanelid, corType);
if (cfgDrawEtaPhiDis && system == SameEvent) {
registry.fill(HIST("EtaPhi"), eta, phi, ampl * eventWeight);
}
float deltaPhi = RecoDecay::constrainAngle(track1.phi() - phi, -PIHalf);
float deltaEta = track1.eta() - eta;
// fill the right sparse and histograms
Expand Down Expand Up @@ -606,19 +617,19 @@ struct LongRangeDihadronCor {
}

template <CorrelationContainer::CFStep step, typename TFT0s>
void fillCorrelationsFT0AFT0C(TFT0s const& ft0, float posZ, int system, float eventWeight) // function to fill the Output functions (sparse) and the delta eta and delta phi histograms
void fillCorrelationsFT0AFT0C(TFT0s const& ft0Col1, TFT0s const& ft0Col2, float posZ, int system, float eventWeight) // function to fill the Output functions (sparse) and the delta eta and delta phi histograms
{
int fSampleIndex = gRandom->Uniform(0, cfgSampleSize);

float triggerWeight = 1.0f;
std::size_t channelASize = ft0.channelA().size();
std::size_t channelCSize = ft0.channelC().size();
std::size_t channelASize = ft0Col1.channelA().size();
std::size_t channelCSize = ft0Col2.channelC().size();
// loop over all tracks
for (std::size_t iChA = 0; iChA < channelASize; iChA++) {

int chanelAid = 0;
float amplA = 0.;
getChannel(ft0, iChA, chanelAid, amplA, kFT0A);
getChannel(ft0Col1, iChA, chanelAid, amplA, kFT0A);
auto phiA = getPhiFT0(chanelAid, kFT0A);
auto etaA = getEtaFT0(chanelAid, kFT0A);

Expand All @@ -629,7 +640,7 @@ struct LongRangeDihadronCor {
for (std::size_t iChC = 0; iChC < channelCSize; iChC++) {
int chanelCid = 0;
float amplC = 0.;
getChannel(ft0, iChC, chanelCid, amplC, kFT0C);
getChannel(ft0Col2, iChC, chanelCid, amplC, kFT0C);
auto phiC = getPhiFT0(chanelCid, kFT0C);
auto etaC = getEtaFT0(chanelCid, kFT0C);
float deltaPhi = RecoDecay::constrainAngle(phiA - phiC, -PIHalf);
Expand Down Expand Up @@ -983,7 +994,7 @@ struct LongRangeDihadronCor {

sameFt0aFt0c->fillEvent(tracks.size(), CorrelationContainer::kCFStepReconstructed);
const auto& ft0 = collision.foundFT0();
fillCorrelationsFT0AFT0C<CorrelationContainer::kCFStepReconstructed>(ft0, collision.posZ(), SameEvent, weightCent);
fillCorrelationsFT0AFT0C<CorrelationContainer::kCFStepReconstructed>(ft0, ft0, collision.posZ(), SameEvent, weightCent);
}
PROCESS_SWITCH(LongRangeDihadronCor, processSameFt0aFt0c, "Process same event for FT0A-FT0C correlation", false);

Expand Down Expand Up @@ -1041,8 +1052,9 @@ struct LongRangeDihadronCor {
float weightCent = 1.0f;
if (!cfgCentTableUnavailable)
getCentralityWeight(weightCent, cent1);
const auto& ft0 = collision2.foundFT0();
fillCorrelationsFT0AFT0C<CorrelationContainer::kCFStepReconstructed>(ft0, collision1.posZ(), MixedEvent, eventWeight * weightCent);
const auto& ft0Col1 = collision1.foundFT0();
const auto& ft0Col2 = collision2.foundFT0();
fillCorrelationsFT0AFT0C<CorrelationContainer::kCFStepReconstructed>(ft0Col1, ft0Col2, collision1.posZ(), MixedEvent, eventWeight * weightCent);
}
}
PROCESS_SWITCH(LongRangeDihadronCor, processMixedFt0aFt0c, "Process mixed events for FT0A-FT0C correlation", false);
Expand Down
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