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[PWGCF] jEPFlowAnalysis.cxx: add angular selection for two leading tracks #17291

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Merged
wenyaCern merged 3 commits into from
Aug 3, 2026
+45 −13
Merged

[PWGCF] jEPFlowAnalysis.cxx: add angular selection for two leading tracks #17291

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98f380a
add angular selection for two leading tracks
jikim1290 Aug 3, 2026
ca1d708
Please consider the following formatting changes
alibuild Aug 3, 2026
015a390
Merge pull request #206 from alibuild/alibot-cleanup-17291
jikim1290 Aug 3, 2026
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58 changes: 45 additions & 13 deletions PWGCF/JCorran/Tasks/jEPFlowAnalysis.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -154,6 +154,8 @@ struct JEPFlowAnalysis {

Configurable<bool> cfgSelEvtTwoHP{"cfgSelEvtTwoHP", false, "event selection with two high pT"};
Configurable<float> cfgHighPtSel{"cfgHighPtSel", 5.0, "pT threshold with cfgSelEvtTwoHP"};
Configurable<float> cfgTwoLPAngle{"cfgTwoLPAngle", 0.5, "azimuthal difference between two LP"};
Configurable<float> cfgEtaBalancing{"cfgEtaBalancing", 0.5, "pseudorapidity difference between two LP"};

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 @@ -193,8 +195,14 @@ struct JEPFlowAnalysis {

float activity = -1.;
float qOvecM = -1.;
float highestPt = -1.;
float hPtPhi = -999.;

float leadingPt = -1.;
float leadingPhi = -999.;
float leadingEta = -999.;

float subleadingPt = -1.;
float subleadingPhi = -999.;
float subleadingEta = -999.;

std::vector<TProfile3D*> shiftprofile{};
std::string fullCCDBShiftCorrPath;
Expand Down Expand Up @@ -424,11 +432,33 @@ struct JEPFlowAnalysis {
}

if (cfgSelEvtTwoHP && i == 0) {
leadingPt = 0.0;
leadingPhi = 0.0;
leadingEta = 0.0;

subleadingPt = 0.0;
subleadingPhi = 0.0;
subleadingEta = 0.0;

nHighPt = 0;
for (const auto& track : tracks) {
if (cfgTrkSelFlag && trackSel(track))
continue;

if (leadingPt < track.pt()) {
subleadingPt = leadingPt;
subleadingPhi = leadingPhi;
subleadingEta = leadingEta;

leadingPt = track.pt();
leadingPhi = track.phi();
leadingEta = track.eta();
} else if (track.pt() > subleadingPt) {
subleadingPt = track.pt();
subleadingPhi = track.phi();
subleadingEta = track.eta();
}

if (track.pt() > cfgHighPtSel)
nHighPt++;
}
Expand All @@ -437,6 +467,12 @@ struct JEPFlowAnalysis {
if (cfgSelEvtTwoHP && nHighPt < minnHighPt)
continue;

if (std::abs(RecoDecay::constrainAngle(leadingPhi - subleadingPhi, 0) - constants::math::PI) > cfgTwoLPAngle)
continue;

if (std::abs(leadingEta + subleadingEta) > cfgEtaBalancing)
continue;

epFlowHistograms.fill(HIST("EpDet"), i + 2, cent, eps[0]);
epFlowHistograms.fill(HIST("EpRefA"), i + 2, cent, eps[1]);
epFlowHistograms.fill(HIST("EpRefB"), i + 2, cent, eps[2]);
Expand Down Expand Up @@ -486,17 +522,13 @@ struct JEPFlowAnalysis {
continue;
}

highestPt = 0.0;
hPtPhi = 0.0;
leadingPt = 0.0;
leadingPhi = 0.0;
leadingEta = 0.0;
for (const auto& track : tracks) {
if (cfgTrkSelFlag && trackSel(track))
continue;

if (highestPt < track.pt()) {
highestPt = track.pt();
hPtPhi = track.phi();
}

if (cfgEffCor) {
weight = getEfficiencyCorrection(effMap, track.eta(), track.pt(), cent, coll.posZ());
}
Expand Down Expand Up @@ -525,14 +557,14 @@ struct JEPFlowAnalysis {
}
}
if (i == 0) { // second harmonic only
epFlowHistograms.fill(HIST("hQoverM"), cent, highestPt, qOvecM);
epFlowHistograms.fill(HIST("hActivity"), cent, highestPt, activity);
epFlowHistograms.fill(HIST("hQoverM"), cent, leadingPt, qOvecM);
epFlowHistograms.fill(HIST("hActivity"), cent, leadingPt, activity);

epFlowHistograms.fill(HIST("hQoverM2M"), cent, coll.qvecAmp()[detId], qOvecM);
epFlowHistograms.fill(HIST("hQoverM2Q2"), cent, q2Mag, qOvecM);

epFlowHistograms.fill(HIST("hQoverMdphi"), cent, RecoDecay::constrainAngle(hPtPhi - eps[0], -constants::math::PI), qOvecM);
epFlowHistograms.fill(HIST("hActivitydphi"), cent, RecoDecay::constrainAngle(hPtPhi - eps[0], -constants::math::PI), highestPt, activity);
epFlowHistograms.fill(HIST("hQoverMdphi"), cent, RecoDecay::constrainAngle(leadingPhi - eps[0], -constants::math::PI), qOvecM);
epFlowHistograms.fill(HIST("hActivitydphi"), cent, RecoDecay::constrainAngle(leadingPhi - eps[0], -constants::math::PI), leadingPt, activity);
}
}
}
Expand Down
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