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[PWGLF] Use configurables in QA process function #12100

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Merged
abmodak merged 2 commits into from
Jul 17, 2025
Merged

[PWGLF] Use configurables in QA process function #12100

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dcfad57
Adds process function for Poisson bootstrap
omvazque Jul 5, 2025
56e5302
Use configureables in QA process function
omvazque Jul 16, 2025
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303 changes: 283 additions & 20 deletions PWGLF/Tasks/GlobalEventProperties/uccZdc.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@

#include "TPDGCode.h"
#include <TRandom.h>
#include <TRandom3.h>

#include <chrono>
#include <cmath>
Expand All @@ -46,6 +47,7 @@
#include <numeric>
#include <string>
#include <string_view>
#include <typeinfo>
#include <vector>

using namespace std;
Expand All @@ -65,6 +67,16 @@ using SimCollisions = soa::Join<aod::Collisions, aod::EvSels, aod::McCollisionLa
using SimTracks = soa::Join<aod::Tracks, aod::TrackSelection, aod::TracksExtra, aod::TracksDCA, aod::McTrackLabels>;
} // namespace o2::aod

static constexpr int kSizeBootStrapEnsemble{8};

std::array<std::shared_ptr<TH1>, kSizeBootStrapEnsemble> hPoisson{};
std::array<std::shared_ptr<TH1>, kSizeBootStrapEnsemble> hNch{};
std::array<std::shared_ptr<TProfile>, kSizeBootStrapEnsemble> pNchVsOneParCorr{};
std::array<std::shared_ptr<TProfile2D>, kSizeBootStrapEnsemble> pNchVsOneParCorrVsZN{};
std::array<std::shared_ptr<TProfile2D>, kSizeBootStrapEnsemble> pNchVsTwoParCorrVsZN{};
std::array<std::shared_ptr<TProfile2D>, kSizeBootStrapEnsemble> pNchVsThreeParCorrVsZN{};
std::array<std::shared_ptr<TProfile2D>, kSizeBootStrapEnsemble> pNchVsFourParCorrVsZN{};

struct UccZdc {

static constexpr float kCollEnergy{2.68};
Expand Down Expand Up @@ -183,11 +195,11 @@ struct UccZdc {

registry.add("zPos", ";;Entries;", kTH1F, {axisZpos});
registry.add("T0Ccent", ";;Entries", kTH1F, {axisCent});
registry.add("NchUncorrected", ";#it{N}_{ch} (|#eta| < 0.8);Entries;", kTH1F, {{300, 0., 3000.}});
registry.add("NchUncorrected", ";#it{N}_{ch} (|#eta| < 0.8);Entries;", kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("hEventCounter", ";;Events", kTH1F, {axisEvent});
registry.add("ZNamp", ";ZNA+ZNC;Entries;", kTH1F, {{nBinsZN, -0.5, maxZN}});
registry.add("ExcludedEvtVsFT0M", ";T0A+T0C (#times 1/100, -3.3 < #eta < -2.1 and 3.5 < #eta < 4.9);Entries;", kTH1F, {{nBinsAmpFT0, 0., maxAmpFT0}});
registry.add("ExcludedEvtVsNch", ";#it{N}_{ch} (|#eta|<0.8);Entries;", kTH1F, {{300, 0, 3000}});
registry.add("ExcludedEvtVsNch", ";#it{N}_{ch} (|#eta|<0.8);Entries;", kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("Nch", ";#it{N}_{ch} (|#eta| < 0.8, Corrected);", kTH1F, {{nBinsNch, minNch, maxNch}});
registry.add("NchVsOneParCorr", ";#it{N}_{ch} (|#eta| < 0.8, Corrected);#LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile, {{nBinsNch, minNch, maxNch}});
registry.add("EtaVsPhi", ";#eta;#varphi", kTH2F, {{{axisEta}, {100, -0.1 * PI, +2.1 * PI}}});
Expand Down Expand Up @@ -229,6 +241,18 @@ struct UccZdc {
registry.add("NchVsFourParCorrVsZN", ";#it{N}_{ch} (|#eta| < 0.8, Corrected);ZNA+ZNC;#LT[#it{p}_{T}^{(4)}]#GT", kTProfile2D, {{{nBinsNch, minNch, maxNch}, {nBinsZN, -0.5, maxZN}}});
}

if (doprocessEventSampling) {
for (int i = 0; i < kSizeBootStrapEnsemble; i++) {
hNch[i] = registry.add<TH1>(Form("Nch_Replica%d", i), ";#it{N}_{ch} (|#eta| < 0.8);Entries", kTH1F, {{nBinsNch, minNch, maxNch}});
hPoisson[i] = registry.add<TH1>(Form("Poisson_Replica%d", i), ";#it{k};Entries", kTH1F, {{21, -0.5, 20.5}});
pNchVsOneParCorrVsZN[i] = registry.add<TProfile2D>(Form("NchVsOneParCorrVsZN_Replica%d", i), ";#it{N}_{ch}, |#eta| < 0.8; ZNA+ZNC; #LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile2D, {{{nBinsNch, minNch, maxNch}, {nBinsZN, -0.5, maxZN}}});
pNchVsTwoParCorrVsZN[i] = registry.add<TProfile2D>(Form("NchVsTwoParCorrVsZN_Replica%d", i), ";#it{N}_{ch}, |#eta| < 0.8; ZNA+ZNC; #LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile2D, {{{nBinsNch, minNch, maxNch}, {nBinsZN, -0.5, maxZN}}});
pNchVsThreeParCorrVsZN[i] = registry.add<TProfile2D>(Form("NchVsThreeParCorrVsZN_Replica%d", i), ";#it{N}_{ch}, |#eta| < 0.8; ZNA+ZNC; #LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile2D, {{{nBinsNch, minNch, maxNch}, {nBinsZN, -0.5, maxZN}}});
pNchVsFourParCorrVsZN[i] = registry.add<TProfile2D>(Form("NchVsFourParCorrVsZN_Replica%d", i), ";#it{N}_{ch}, |#eta| < 0.8; ZNA+ZNC; #LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile2D, {{{nBinsNch, minNch, maxNch}, {nBinsZN, -0.5, maxZN}}});
pNchVsOneParCorr[i] = registry.add<TProfile>(Form("NchVsOneParCorr_Replica%d", i), ";#it{N}_{ch}, |#eta| < 0.8;#LT[#it{p}_{T}^{(1)}]#GT (GeV/#it{c})", kTProfile, {{nBinsNch, minNch, maxNch}});
}
}

if (doprocessMCclosure) {
registry.add("RandomNumber", "", kTH1F, {{50, 0., 1.}});
registry.add("EvtsDivided", ";Event type;Entries;", kTH1F, {{2, -0.5, 1.5}});
Expand Down Expand Up @@ -275,24 +299,24 @@ struct UccZdc {
if (doprocessQA) {
registry.add("Debunch", ";t_{ZDC}-t_{ZDA};t_{ZDC}+t_{ZDA}", kTH2F, {{{nBinsTDC, minTdc, maxTdc}, {nBinsTDC, minTdc, maxTdc}}});
registry.add("NchVsFT0M", ";T0A+T0C (#times 1/100, -3.3 < #eta < -2.1 and 3.5 < #eta < 4.9);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsFT0A", ";T0A (#times 1/100, 3.5 < #eta < 4.9);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{80, 0., 1800.}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsFT0C", ";T0C (#times 1/100, -3.3 < #eta < -2.1);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{80, 0., 600.}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsFT0A", ";T0A (#times 1/100, 3.5 < #eta < 4.9);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsFT0C", ";T0C (#times 1/100, -3.3 < #eta < -2.1);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsFV0A", ";V0A (#times 1/100, 2.2 < #eta < 5);#it{N}_{ch} (|#eta|<0.8);", kTH2F, {{{80, 0., maxAmpFV0}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsEt", ";#it{E}_{T} (|#eta|<0.8);#LTITS+TPC tracks#GT (|#eta|<0.8);", kTH2F, {{{nBinsNch, minNch, maxNch}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsNPV", ";#it{N}_{PV} (|#eta|<1);ITS+TPC tracks (|#eta|<0.8);", kTH2F, {{{300, -0.5, 5999.5}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsITStracks", ";ITS tracks nCls >= 5;TITS+TPC tracks (|#eta|<0.8);", kTH2F, {{{300, -0.5, 5999.5}, {nBinsNch, minNch, maxNch}}});
registry.add("ZNVsFT0A", ";T0A (#times 1/100);ZNA+ZNC;", kTH2F, {{{80, 0., 1800.}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNVsFT0C", ";T0C (#times 1/100);ZNA+ZNC;", kTH2F, {{{80, 0., 600.}, {nBinsZN, -0.5, maxZN}}});
registry.add("NchVsNPV", ";#it{N}_{PV} (|#eta|<1);ITS+TPC tracks (|#eta|<0.8);", kTH2F, {{{nBinsITSTrack, minITSTrack, maxITSTrack}, {nBinsNch, minNch, maxNch}}});
registry.add("NchVsITStracks", ";ITS tracks nCls >= 5;TITS+TPC tracks (|#eta|<0.8);", kTH2F, {{{nBinsITSTrack, minITSTrack, maxITSTrack}, {nBinsNch, minNch, maxNch}}});
registry.add("ZNVsFT0A", ";T0A (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNVsFT0C", ";T0C (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNVsFT0M", ";T0A+T0C (#times 1/100);ZNA+ZNC;", kTH2F, {{{nBinsAmpFT0, 0., maxAmpFT0}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNAamp", ";ZNA;Entries;", kTH1F, {{nBinsZN, -0.5, maxZN}});
registry.add("ZPAamp", ";ZPA;Entries;", kTH1F, {{nBinsZP, -0.5, maxZP}});
registry.add("ZNCamp", ";ZNC;Entries;", kTH1F, {{nBinsZN, -0.5, maxZN}});
registry.add("ZPCamp", ";ZPC;Entries;", kTH1F, {{nBinsZP, -0.5, maxZP}});
registry.add("ZNAVsZNC", ";ZNC;ZNA", kTH2F, {{{30, -0.5, maxZN}, {30, -0.5, maxZN}}});
registry.add("ZPAVsZPC", ";ZPC;ZPA;", kTH2F, {{{100, -0.5, maxZP}, {100, -0.5, maxZP}}});
registry.add("ZNAVsZPA", ";ZPA;ZNA;", kTH2F, {{{20, -0.5, maxZP}, {30, -0.5, maxZN}}});
registry.add("ZNCVsZPC", ";ZPC;ZNC;", kTH2F, {{{20, -0.5, maxZP}, {30, -0.5, maxZN}}});
registry.add("ZNVsZEM", ";ZEM;ZNA+ZNC;", kTH2F, {{{60, -0.5, maxZEM}, {60, -0.5, maxZN}}});
registry.add("ZNAVsZNC", ";ZNC;ZNA", kTH2F, {{{nBinsZN, -0.5, maxZN}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZPAVsZPC", ";ZPC;ZPA;", kTH2F, {{{nBinsZP, -0.5, maxZP}, {nBinsZP, -0.5, maxZP}}});
registry.add("ZNAVsZPA", ";ZPA;ZNA;", kTH2F, {{{nBinsZP, -0.5, maxZP}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNCVsZPC", ";ZPC;ZNC;", kTH2F, {{{nBinsZP, -0.5, maxZP}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNVsZEM", ";ZEM;ZNA+ZNC;", kTH2F, {{{nBinsZN, -0.5, maxZEM}, {nBinsZN, -0.5, maxZN}}});
registry.add("ZNCVsNch", ";#it{N}_{ch} (|#eta|<0.8);ZNC;", kTH2F, {{{nBinsNch, minNch, maxNch}, {nBinsZN, minZN, maxZN}}});
registry.add("ZNAVsNch", ";#it{N}_{ch} (|#eta|<0.8);ZNA;", kTH2F, {{{nBinsNch, minNch, maxNch}, {nBinsZN, minZN, maxZN}}});
registry.add("ZNVsNch", ";#it{N}_{ch} (|#eta|<0.8);ZNA+ZNC;", kTH2F, {{{nBinsNch, minNch, maxNch}, {nBinsZN, minZN, maxZN}}});
Expand Down Expand Up @@ -440,7 +464,6 @@ struct UccZdc {
return;
}
registry.fill(HIST("hEventCounter"), EvCutLabel::TZero);

if (foundBC.has_fv0a()) {
for (const auto& amplitude : foundBC.fv0a().amplitude()) {
aV0A += amplitude;
Expand Down Expand Up @@ -468,7 +491,6 @@ struct UccZdc {
zpC /= kCollEnergy;
float sumZNs{znA + znC};
float sumZEMs{aZEM1 + aZEM2};

// TDC cut
if (isTDCcut) {
if (std::sqrt(std::pow(tZDCdif, 2.) + std::pow(tZDCsum, 2.)) > tdcCut) {
Expand Down Expand Up @@ -519,15 +541,14 @@ struct UccZdc {
const double nSigmaSelection{nSigmaNchCut * sigmaNch};
const double diffMeanNch{meanNch - glbTracks};

if (!(std::abs(diffMeanNch) < nSigmaSelection)) {
if (std::abs(diffMeanNch) > nSigmaSelection) {
registry.fill(HIST("ExcludedEvtVsFT0M"), normT0M);
registry.fill(HIST("ExcludedEvtVsNch"), glbTracks);
} else {
skipEvent = true;
}
}

if (!skipEvent) {
if (useMidRapNchSel && skipEvent) {
return;
}

Expand Down Expand Up @@ -578,9 +599,8 @@ struct UccZdc {
registry.fill(HIST("ZNCVsNch"), glbTracks, znC);
registry.fill(HIST("ZNVsNch"), glbTracks, sumZNs);
registry.fill(HIST("ZNDifVsNch"), glbTracks, znA - znC);
if (glbTracks >= minNchSel) {
if (glbTracks >= minNchSel)
registry.fill(HIST("NchVsOneParCorr"), glbTracks, meanpt / glbTracks);
}
}
PROCESS_SWITCH(UccZdc, processQA, "Process QA", true);

Expand Down Expand Up @@ -826,6 +846,249 @@ struct UccZdc {
}
PROCESS_SWITCH(UccZdc, processZdcCollAss, "Process ZDC W/Coll Ass.", true);

void processEventSampling(o2::aod::ColEvSels::iterator const& collision, o2::aod::BCsRun3 const& /*bcs*/, aod::Zdcs const& /*zdcs*/, aod::FV0As const& /*fv0as*/, aod::FT0s const& /*ft0s*/, TheFilteredTracks const& tracks)
{
if (!isEventSelected(collision)) {
return;
}

const auto& foundBC = collision.foundBC_as<o2::aod::BCsRun3>();

// has ZDC?
if (!foundBC.has_zdc()) {
return;
}
registry.fill(HIST("hEventCounter"), EvCutLabel::Zdc);

float aT0A = 0., aT0C = 0.;
if (foundBC.has_ft0()) {
for (const auto& amplitude : foundBC.ft0().amplitudeA()) {
aT0A += amplitude;
}
for (const auto& amplitude : foundBC.ft0().amplitudeC()) {
aT0C += amplitude;
}
} else {
return;
}

registry.fill(HIST("hEventCounter"), EvCutLabel::TZero);

const double normT0M{(aT0A + aT0C) / 100.};
float znA{foundBC.zdc().amplitudeZNA()};
float znC{foundBC.zdc().amplitudeZNC()};
float aZEM1{foundBC.zdc().amplitudeZEM1()};
float aZEM2{foundBC.zdc().amplitudeZEM2()};
float tZNA{foundBC.zdc().timeZNA()};
float tZNC{foundBC.zdc().timeZNC()};
float tZPA{foundBC.zdc().timeZPA()};
float tZPC{foundBC.zdc().timeZPC()};
float tZDCdif{tZNC + tZPC - tZNA - tZPA};
float tZDCsum{tZNC + tZPC + tZNA + tZPA};
znA /= kCollEnergy;
znC /= kCollEnergy;
float sumZNs{znA + znC};
float sumZEMs{aZEM1 + aZEM2};

// TDC cut
if (isTDCcut) {
if (std::sqrt(std::pow(tZDCdif, 2.) + std::pow(tZDCsum, 2.)) > tdcCut) {
return;
}
registry.fill(HIST("hEventCounter"), EvCutLabel::Tdc);
}

// ZEM cut
if (isZEMcut) {
if (sumZEMs < zemCut) {
return;
}
registry.fill(HIST("hEventCounter"), EvCutLabel::Zem);
}

registry.fill(HIST("zPos"), collision.posZ());
registry.fill(HIST("T0Ccent"), collision.centFT0C());

// Nch-based selection
int glbTracks = 0;
for (const auto& track : tracks) {
// Track Selection
// if (track.hasITS()) { itsTracks++; }
if (!track.isGlobalTrack()) {
continue;
}
if ((track.pt() < minPt) || (track.pt() > maxPt)) {
continue;
}
registry.fill(HIST("ZposVsEta"), collision.posZ(), track.eta());
registry.fill(HIST("EtaVsPhi"), track.eta(), track.phi());
registry.fill(HIST("sigma1Pt"), track.pt(), track.sigma1Pt());
registry.fill(HIST("dcaXYvspT"), track.dcaXY(), track.pt());
glbTracks++;
}

bool skipEvent{false};
if (useMidRapNchSel) {
auto hMeanNch = ccdb->getForTimeStamp<TH1F>(paTHmeanNch.value, foundBC.timestamp());
auto hSigmaNch = ccdb->getForTimeStamp<TH1F>(paTHsigmaNch.value, foundBC.timestamp());
if (!hMeanNch) {
LOGF(info, "hMeanNch NOT LOADED!");
return;
}
if (!hSigmaNch) {
LOGF(info, "hSigmaNch NOT LOADED!");
return;
}

const int binT0M{hMeanNch->FindBin(normT0M)};
const double meanNch{hMeanNch->GetBinContent(binT0M)};
const double sigmaNch{hSigmaNch->GetBinContent(binT0M)};
const double nSigmaSelection{nSigmaNchCut * sigmaNch};
const double diffMeanNch{meanNch - glbTracks};

if (!(std::abs(diffMeanNch) < nSigmaSelection)) {
registry.fill(HIST("ExcludedEvtVsFT0M"), normT0M);
registry.fill(HIST("ExcludedEvtVsNch"), glbTracks);
} else {
skipEvent = true;
}
}

// Skip event based on number of Nch sigmas
if (!skipEvent) {
return;
}

auto efficiency = ccdb->getForTimeStamp<TH2F>(paTHEff.value, foundBC.timestamp());
if (!efficiency) {
return;
}

auto feedDown = ccdb->getForTimeStamp<TH2F>(paTHFD.value, foundBC.timestamp());
if (!feedDown) {
return;
}

//---------------------------------------------------

uint64_t timeStamp{foundBC.timestamp()};

TRandom3 rndGen(timeStamp);
std::vector<uint64_t> vPoisson;
for (int replica = 0; replica < kSizeBootStrapEnsemble; ++replica) {
vPoisson.emplace_back(rndGen.Poisson(1.));
}

for (int replica = 0; replica < kSizeBootStrapEnsemble; ++replica) {

hPoisson[replica]->Fill(vPoisson.at(replica));

for (uint64_t evtRep = 0; evtRep < vPoisson.at(replica); ++evtRep) {

double nchMult{0.};
std::vector<float> pTs;
std::vector<float> vecFD;
std::vector<float> vecEff;

// Calculates the Nch multiplicity
for (const auto& track : tracks) {
// Track Selection
if (!track.isGlobalTrack()) {
continue;
}
if ((track.pt() < minPt) || (track.pt() > maxPt)) {
continue;
}

float pt{track.pt()};
int foundNchBin{efficiency->GetXaxis()->FindBin(glbTracks)};
int foundPtBin{efficiency->GetYaxis()->FindBin(pt)};
float effValue{1.};
float fdValue{1.};
if (applyEff) {
effValue = efficiency->GetBinContent(foundNchBin, foundPtBin);
}
if (applyFD) {
fdValue = feedDown->GetBinContent(foundNchBin, foundPtBin);
}
if ((effValue > 0.) && (fdValue > 0.)) {
nchMult += (std::pow(effValue, -1.) * fdValue);
}
}

if (!applyEff)
nchMult = static_cast<double>(glbTracks);
if (applyEff && !correctNch)
nchMult = static_cast<double>(glbTracks);
if (nchMult < minNchSel) {
return;
}

// Fill vectors for [pT] measurement
pTs.clear();
vecFD.clear();
vecEff.clear();
for (const auto& track : tracks) {
// Track Selection
if (!track.isGlobalTrack()) {
continue;
}
if ((track.pt() < minPt) || (track.pt() > maxPtSpectra)) {
continue;
}

float pt{track.pt()};
int foundNchBin{efficiency->GetXaxis()->FindBin(glbTracks)};
int foundPtBin{efficiency->GetYaxis()->FindBin(pt)};
float effValue{1.};
float fdValue{1.};
if (applyEff) {
effValue = efficiency->GetBinContent(foundNchBin, foundPtBin);
fdValue = feedDown->GetBinContent(foundNchBin, foundPtBin);
}
if (applyEff && !applyFD) {
fdValue = 1.0;
}
if ((effValue > 0.) && (fdValue > 0.)) {
pTs.emplace_back(pt);
vecEff.emplace_back(effValue);
vecFD.emplace_back(fdValue);
}
}

double p1, p2, p3, p4, w1, w2, w3, w4;
p1 = p2 = p3 = p4 = w1 = w2 = w3 = w4 = 0.0;
getPTpowers(pTs, vecEff, vecFD, p1, w1, p2, w2, p3, w3, p4, w4);

// EbE one-particle pT correlation
double oneParCorr{p1 / w1};

// EbE two-particle pT correlation
double denTwoParCorr{std::pow(w1, 2.) - w2};
double numTwoParCorr{std::pow(p1, 2.) - p2};
double twoParCorr{numTwoParCorr / denTwoParCorr};

// EbE three-particle pT correlation
double denThreeParCorr{std::pow(w1, 3.) - 3. * w2 * w1 + 2. * w3};
double numThreeParCorr{std::pow(p1, 3.) - 3. * p2 * p1 + 2. * p3};
double threeParCorr{numThreeParCorr / denThreeParCorr};

// EbE four-particle pT correlation
double denFourParCorr{std::pow(w1, 4.) - 6. * w2 * std::pow(w1, 2.) + 3. * std::pow(w2, 2.) + 8 * w3 * w1 - 6. * w4};
double numFourParCorr{std::pow(p1, 4.) - 6. * p2 * std::pow(p1, 2.) + 3. * std::pow(p2, 2.) + 8 * p3 * p1 - 6. * p4};
double fourParCorr{numFourParCorr / denFourParCorr};

hNch[replica]->Fill(nchMult);
pNchVsOneParCorr[replica]->Fill(nchMult, oneParCorr, w1);
pNchVsOneParCorrVsZN[replica]->Fill(nchMult, sumZNs, oneParCorr, w1);
pNchVsTwoParCorrVsZN[replica]->Fill(nchMult, sumZNs, twoParCorr, denTwoParCorr);
pNchVsThreeParCorrVsZN[replica]->Fill(nchMult, sumZNs, threeParCorr, denThreeParCorr);
pNchVsFourParCorrVsZN[replica]->Fill(nchMult, sumZNs, fourParCorr, denFourParCorr);
}
}
}
PROCESS_SWITCH(UccZdc, processEventSampling, "Process Event Sampling 4 Bootstrap", true);

// Preslice<aod::McParticles> perMCCollision = aod::mcparticle::mcCollisionId;
Preslice<TheFilteredSimTracks> perCollision = aod::track::collisionId;
Service<o2::framework::O2DatabasePDG> pdg;
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