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[PWGCF] Apply charged-track corrections to EP flow and add correction QA #18679

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[PWGCF] Apply charged-track corrections to EP flow and add correction QA #18679

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72 changes: 62 additions & 10 deletions PWGCF/Flow/Tasks/flowEseTask.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -50,6 +50,7 @@
#include <TF1.h>
#include <TH1.h>
#include <TH2.h>
#include <TH3.h>
#include <THnSparse.h>
#include <TObject.h>
#include <TProfile2D.h>
Expand Down Expand Up @@ -150,10 +151,10 @@ struct FlowEseTask {
Configurable<std::string> cfgAccCorPath{"cfgAccCorPath", "", "path for pseudo acceptance correction"};

struct : ConfigurableGroup {
Configurable<bool> cfgGfwEffCor{"cfgGfwEffCor", false, "flag to apply charged-track efficiency correction for GFW"};
Configurable<std::string> cfgGfwEffCorPath{"cfgGfwEffCorPath", "", "CCDB path to charged-track efficiency correction for GFW"};
Configurable<bool> cfgGfwAccCor{"cfgGfwAccCor", false, "flag to apply charged-track acceptance correction for GFW"};
Configurable<std::string> cfgGfwAccCorPath{"cfgGfwAccCorPath", "", "CCDB path to charged-track acceptance correction for GFW"};
Configurable<bool> cfgGfwEffCor{"cfgGfwEffCor", false, "flag to apply charged-track efficiency correction for EP and GFW"};
Configurable<std::string> cfgGfwEffCorPath{"cfgGfwEffCorPath", "", "CCDB path to charged-track efficiency correction for EP and GFW"};
Configurable<bool> cfgGfwAccCor{"cfgGfwAccCor", false, "flag to apply charged-track acceptance correction for EP and GFW"};
Configurable<std::string> cfgGfwAccCorPath{"cfgGfwAccCorPath", "", "CCDB path to charged-track acceptance correction for EP and GFW"};
} cfgGfwParam;

Configurable<bool> cfgCalcCum{"cfgCalcCum", false, "flag to calculate cumulants of cossin"};
Expand Down Expand Up @@ -187,6 +188,9 @@ struct FlowEseTask {

static constexpr float MinAmplitudeThreshold = 1e-5f;
static constexpr int ShiftLevel = 10;
static constexpr int CorrectionWeightBins = 100;
static constexpr int CorrectionSummaryBins = 8;
static constexpr double LargeNUAWeightThreshold = 10.0;
static constexpr int LambdaId = 3122;
static constexpr int SecondHarmonic = 2;
static constexpr int ThirdHarmonic = 3;
Expand Down Expand Up @@ -380,6 +384,7 @@ struct FlowEseTask {
for (int iGroup = 0; iGroup < NEseGroups; ++iGroup) {
const auto suffix = eseGroupSuffix(iGroup);
addEseHistogram<THnSparse>(Form("histV%d_%s", cfgEseHarmonic.value, suffix.c_str()), HistType::kTHnSparseF, {centAxis, ptAxis, cosAxis});
getEseHistogram<THnSparse>(Form("histV%d_%s", cfgEseHarmonic.value, suffix.c_str()))->Sumw2();
addEseHistogram<THnSparse>(Form("psi%d/h_lambda_cos_%s", cfgEseHarmonic.value, suffix.c_str()), HistType::kTHnSparseF, {massAxis, ptAxis, cosAxis, centAxis});
addEseHistogram<THnSparse>(Form("psi%d/h_alambda_cos_%s", cfgEseHarmonic.value, suffix.c_str()), HistType::kTHnSparseF, {massAxis, ptAxis, cosAxis, centAxis});
addEseHistogram<THnSparse>(Form("psi%d/h_lambda_cos2_%s", cfgEseHarmonic.value, suffix.c_str()), HistType::kTHnSparseF, {massAxis, ptAxis, cosAxis, centAxis});
Expand All @@ -389,6 +394,26 @@ struct FlowEseTask {
}
histos.add("QA/CentDist", "", {HistType::kTH1F, {centQaAxis}});
histos.add("QA/PVzDist", "", {HistType::kTH1F, {pVzQaAxis}});
AxisSpec phiQaAxis = {72, 0.0, o2::constants::math::TwoPI};
AxisSpec correctionStageAxis = {3, -0.5, 2.5, "0: raw, 1: NUE, 2: NUE*NUA"};
AxisSpec weightTypeAxis = {3, -0.5, 2.5, "0: NUE, 1: NUA, 2: total"};
std::vector<double> weightBins;
for (int i = 0; i <= CorrectionWeightBins; ++i) {
weightBins.push_back(std::pow(10.0, -2.0 + 0.06 * i));
}
AxisSpec weightAxis = {weightBins, "Correction weight"};
histos.add("QA/hPhiRaw", ";#varphi;Counts", {HistType::kTH1D, {phiQaAxis}});
histos.add("QA/hPhiNUA", ";#varphi;Weighted counts", {HistType::kTH1D, {phiQaAxis}});
histos.add("QA/hPtCentStage", "", {HistType::kTH3D, {ptAxis, centAxis, correctionStageAxis}});
histos.add("QA/hWeightPtType", "", {HistType::kTH3D, {ptAxis, weightAxis, weightTypeAxis}});
histos.add("QA/hCorrectionSummary", "", {HistType::kTH1D, {{8, 0.5, 8.5}}});
const char* correctionLabels[] = {"selected", "ptOutsideEffAxis", "invalidEfficiency", "accepted", "sumW", "sumW2", "NUAWeightAbove10", "invalidWeight"};
for (int i = 0; i < CorrectionSummaryBins; ++i) {
histos.get<TH1>(HIST("QA/hCorrectionSummary"))->GetXaxis()->SetBinLabel(i + 1, correctionLabels[i]);
}
histos.get<TH1>(HIST("QA/hPhiNUA"))->Sumw2();
histos.get<TH3>(HIST("QA/hPtCentStage"))->Sumw2();
histos.get<TH1>(HIST("QA/hCorrectionSummary"))->Sumw2();
histos.add("psi2/h_Ref03Gap22", "", {HistType::kTProfile, {centAxis}});
histos.add("psi2/h_PoiN03Gap22", "", {HistType::kTProfile2D, {ptAxis, centAxis}});
histos.add("psi2/h_PoiP03Gap22", "", {HistType::kTProfile2D, {ptAxis, centAxis}});
Expand Down Expand Up @@ -955,18 +980,20 @@ struct FlowEseTask {
if (!selectionTrack(trk)) {
continue;
}
if (fillEse) {
const std::array<double, 3> values = {centrality, trk.pt(), std::cos(static_cast<float>(nmode) * (trk.phi() - esePlane))};
histEseVn->Fill(values.data());
}
if (!fillGfw) {
continue;
if (fillGfw) {
histos.fill(HIST("QA/hCorrectionSummary"), 1.0);
}
double weff = 1.0;
double wacc = 1.0;
if (cfgGfwParam.cfgGfwEffCor && gfwState.gfwEffMap != nullptr) {
if (fillGfw && (trk.pt() < gfwState.gfwEffMap->GetXaxis()->GetXmin() || trk.pt() >= gfwState.gfwEffMap->GetXaxis()->GetXmax())) {
histos.fill(HIST("QA/hCorrectionSummary"), 2.0);
}
const double efficiency = gfwState.gfwEffMap->GetBinContent(gfwState.gfwEffMap->FindBin(trk.pt()));
if (efficiency <= 0.0) {
if (fillGfw) {
histos.fill(HIST("QA/hCorrectionSummary"), 3.0);
}
continue;
}
weff = 1.0 / efficiency;
Expand All @@ -975,6 +1002,31 @@ struct FlowEseTask {
wacc = gfwState.gfwAccWeights->getNUA(trk.phi(), trk.eta(), collision.posZ());
}
const double trackWeight = weff * wacc;
if (fillEse) {
const std::array<double, 3> values = {centrality, trk.pt(), std::cos(static_cast<float>(nmode) * (trk.phi() - esePlane))};
histEseVn->Fill(values.data(), trackWeight);
}
if (!fillGfw) {
continue;
}
if (std::isfinite(trackWeight) && trackWeight > 0.0) {
histos.fill(HIST("QA/hPhiRaw"), trk.phi());
histos.fill(HIST("QA/hPhiNUA"), trk.phi(), wacc);
histos.fill(HIST("QA/hPtCentStage"), trk.pt(), centrality, 0.0);
histos.fill(HIST("QA/hPtCentStage"), trk.pt(), centrality, 1.0, weff);
histos.fill(HIST("QA/hPtCentStage"), trk.pt(), centrality, 2.0, trackWeight);
histos.fill(HIST("QA/hWeightPtType"), trk.pt(), weff, 0.0);
histos.fill(HIST("QA/hWeightPtType"), trk.pt(), wacc, 1.0);
histos.fill(HIST("QA/hWeightPtType"), trk.pt(), trackWeight, 2.0);
histos.fill(HIST("QA/hCorrectionSummary"), 4.0);
histos.fill(HIST("QA/hCorrectionSummary"), 5.0, trackWeight);
histos.fill(HIST("QA/hCorrectionSummary"), 6.0, trackWeight * trackWeight);
if (wacc > LargeNUAWeightThreshold) {
histos.fill(HIST("QA/hCorrectionSummary"), 7.0);
}
} else {
histos.fill(HIST("QA/hCorrectionSummary"), 8.0);
}
const int ptBin = histPoiN22->GetXaxis()->FindBin(trk.pt()) - 1;
gfwState.fGFW->Fill(trk.eta(), ptBin, trk.phi(), trackWeight, GFWRefMask);
gfwState.fGFW->Fill(trk.eta(), ptBin, trk.phi(), trackWeight, GFWPoiMask);
Expand Down
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