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[PWGCF] jEPFlowAnalysis.cxx: defining q2 selection function, adding multiplicity dependent selection, adding q2 dependent denominator histograms #16300

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[PWGCF] jEPFlowAnalysis.cxx: defining q2 selection function, adding multiplicity dependent selection, adding q2 dependent denominator histograms #16300

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82d9759
adding multiplicity dependent selection
jikim1290 May 19, 2026
d723496
Please consider the following formatting changes
alibuild May 19, 2026
1642989
Merge pull request #188 from alibuild/alibot-cleanup-16300
jikim1290 May 19, 2026
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52 changes: 48 additions & 4 deletions PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -112,8 +112,9 @@ struct JEPFlowAnalysis {
Configurable<float> cfgVertexZ{"cfgVertexZ", 10.0, "Maximum vertex Z selection"};

Configurable<bool> cfgq2analysis{"cfgq2analysis", false, "ese analysis flag"};
Configurable<float> cfgq2high{"cfgq2high", 10.0, "high q2 selection"};
Configurable<float> cfgq2low{"cfgq2low", 0.0, "low q2 selection"};
Configurable<std::vector<float>> cfgMultq2SelBin{"cfgMultq2SelBin", {0, 5, 10, 20, 30, 40, 50, 60, 70, 80, 100}, ""};
Configurable<std::vector<float>> cfgMultq2high{"cfgMultq2high", {}, ""};
Configurable<std::vector<float>> cfgMultq2low{"cfgMultq2low", {}, ""};

Configurable<std::string> cfgDetName{"cfgDetName", "FT0C", "The name of detector to be analyzed"};
Configurable<std::string> cfgRefAName{"cfgRefAName", "TPCPos", "The name of detector for reference A"};
Expand Down Expand Up @@ -153,6 +154,29 @@ struct JEPFlowAnalysis {

THn* effMap = nullptr;

bool q2sel(float q2, bool isHigh)
{
auto it = std::upper_bound(cfgMultq2SelBin->begin(), cfgMultq2SelBin->end(), cent);
int idx = std::distance(cfgMultq2SelBin->begin(), it) - 1;

if (idx < 0) {
idx = 0;
}
if (isHigh) {
if (idx >= static_cast<int>(cfgMultq2high->size())) {
idx = cfgMultq2high->size() - 1;
}
float sel = cfgMultq2high->at(idx);
return q2 > sel;
} else {
if (idx >= static_cast<int>(cfgMultq2low->size())) {
idx = cfgMultq2low->size() - 1;
}
float sel = cfgMultq2low->at(idx);
return q2 < sel;
}
}

template <typename T>
int getdetId(const T& name)
{
Expand Down Expand Up @@ -310,6 +334,18 @@ struct JEPFlowAnalysis {
epFlowHistograms.fill(HIST("EpResQvecRefARefBxx"), i + 2, cent, qx_shifted[1] * qx_shifted[2] + qy_shifted[1] * qy_shifted[2]);
epFlowHistograms.fill(HIST("EpResQvecRefARefBxy"), i + 2, cent, qx_shifted[2] * qy_shifted[1] - qx_shifted[1] * qy_shifted[2]);

if (cfgq2analysis) {
if (q2sel(q2Mag, true)) {
epFlowHistograms.fill(HIST("EpResQvecDetRefAxx_q2high"), i + 2, cent, qx_shifted[0] * qx_shifted[1] + qy_shifted[0] * qy_shifted[1]);
epFlowHistograms.fill(HIST("EpResQvecDetRefBxx_q2high"), i + 2, cent, qx_shifted[0] * qx_shifted[2] + qy_shifted[0] * qy_shifted[2]);
epFlowHistograms.fill(HIST("EpResQvecRefARefBxx_q2high"), i + 2, cent, qx_shifted[1] * qx_shifted[2] + qy_shifted[1] * qy_shifted[2]);
} else if (q2sel(q2Mag, false)) {
epFlowHistograms.fill(HIST("EpResQvecDetRefAxx_q2low"), i + 2, cent, qx_shifted[0] * qx_shifted[1] + qy_shifted[0] * qy_shifted[1]);
epFlowHistograms.fill(HIST("EpResQvecDetRefBxx_q2low"), i + 2, cent, qx_shifted[0] * qx_shifted[2] + qy_shifted[0] * qy_shifted[2]);
epFlowHistograms.fill(HIST("EpResQvecRefARefBxx_q2low"), i + 2, cent, qx_shifted[1] * qx_shifted[2] + qy_shifted[1] * qy_shifted[2]);
}
}

for (const auto& track : tracks) {
if (cfgTrkSelFlag && trackSel(track))
continue;
Expand All @@ -328,9 +364,9 @@ struct JEPFlowAnalysis {
epFlowHistograms.fill(HIST("SPvnxy"), i + 2, cent, track.pt(), track.eta(), (std::sin(track.phi() * static_cast<float>(i + 2)) * qx_shifted[0] - std::cos(track.phi() * static_cast<float>(i + 2)) * qy_shifted[0]), weight);

if (cfgq2analysis) {
if (q2Mag > cfgq2high) {
if (q2sel(q2Mag, true)) {
epFlowHistograms.fill(HIST("SPvnxx_q2high"), i + 2, cent, track.pt(), track.eta(), (std::cos(track.phi() * static_cast<float>(i + 2)) * qx_shifted[0] + std::sin(track.phi() * static_cast<float>(i + 2)) * qy_shifted[0]), weight);
} else if (q2Mag < cfgq2low) {
} else if (q2sel(q2Mag, false)) {
epFlowHistograms.fill(HIST("SPvnxx_q2low"), i + 2, cent, track.pt(), track.eta(), (std::cos(track.phi() * static_cast<float>(i + 2)) * qx_shifted[0] + std::sin(track.phi() * static_cast<float>(i + 2)) * qy_shifted[0]), weight);
}
}
Expand Down Expand Up @@ -397,6 +433,14 @@ struct JEPFlowAnalysis {
epFlowHistograms.add("EpResQvecDetRefBxy", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecRefARefBxx", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecRefARefBxy", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
if (cfgq2analysis) {
epFlowHistograms.add("EpResQvecDetRefAxx_q2high", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecDetRefBxx_q2high", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecRefARefBxx_q2high", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecDetRefAxx_q2low", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecDetRefBxx_q2low", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
epFlowHistograms.add("EpResQvecRefARefBxx_q2low", "", {HistType::kTH3F, {axisMod, axisCent, axisQvec}});
}

epFlowHistograms.add("SPvnxx", "", {HistType::kTHnSparseF, {axisMod, axisCent, axisPt, axisEta, axisQvec}});
epFlowHistograms.add("SPvnxy", "", {HistType::kTHnSparseF, {axisMod, axisCent, axisPt, axisEta, axisQvec}});
Expand Down
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