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[PWGJE] Di-hadron correlation check #14064

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nzardosh merged 1 commit into from
Dec 3, 2025
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[PWGJE] Di-hadron correlation check #14064

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51 changes: 33 additions & 18 deletions PWGJE/Tasks/recoilJets.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -106,12 +106,12 @@ struct RecoilJets {
Configurable<std::vector<float>> phiRestrTTSelection{"phiRestrTTSelection", {0., 6.3}, "Restriction on phi angle (min, max) to search for TT"};

// Leading track and associated track
Configurable<std::vector<float>> pTLeadTrack{"pTLeadTrack", {1., 3.}, "Transverse momenturm range (min, max) for leading tracks"};
Configurable<std::vector<float>> pTAssociatTrack{"pTAssociatTrack", {1., 3.}, "Transverse momenturm range (min, max) for associated tracks"};
Configurable<std::vector<float>> pTLeadTrack{"pTLeadTrack", {4., 6.}, "Transverse momenturm range (min, max) for leading tracks"};
Configurable<float> pTAssociatTrackMin{"pTAssociatTrackMin", 2., "Min transverse momenturm for associated tracks"};

// List of configurable parameters for histograms
Configurable<uint16_t> histJetPt{"histJetPt", 100, "Maximum value of jet pT stored in histograms"};
Configurable<uint16_t> histMultBins{"histMultBins", 1000, "Number of bins for scaled FT0M multiplicity"};
Configurable<uint16_t> histMultBins{"histMultBins", 600, "Number of bins for scaled FT0M multiplicity"};
Configurable<uint16_t> histZDCTimeBins{"histZDCTimeBins", 240, "Number of bins for ZDC timing histograms"};

// Axes specification
Expand Down Expand Up @@ -502,8 +502,12 @@ struct RecoilJets {
}

if (doprocessLeadingAndAssociatedTracksTask) {
spectra.add("hScaledFT0C_Correlation_LeadTrack_AssociatTracks", Form("Leading track #it{p}_{T} #in (%.2f, %.2f); Associated track #it{p}_{T} #in (%.2f, %.2f)", pTLeadTrack->at(0), pTLeadTrack->at(1), pTAssociatTrack->at(0), pTAssociatTrack->at(1)), kTH2F, {{multFT0CThresh, nameFT0Caxis}, {120, -1.28, 5.0, "#it{#varphi} (rad)"}});
spectra.add("hScaledFT0M_Correlation_LeadTrack_AssociatTracks", Form("Leading track #it{p}_{T} #in (%.2f, %.2f); Associated track #it{p}_{T} #in (%.2f, %.2f)", pTLeadTrack->at(0), pTLeadTrack->at(1), pTAssociatTrack->at(0), pTAssociatTrack->at(1)), kTH2F, {{multFT0MThresh, nameFT0Maxis}, {120, -1.28, 5.0, "#it{#varphi} (rad)"}});

spectra.add("hScaledFT0C_NleadTracks", "Total number of selected leading tracks vs scaled FT0C", kTH2F, {{scaledFT0C}, {1, 0.0, 1.}});
spectra.add("hScaledFT0M_NleadTracks", "Total number of selected leading tracks vs scaled FT0M", kTH2F, {{scaledFT0M}, {1, 0.0, 1.}});

spectra.add("hScaledFT0C_Correlation_LeadTrack_AssociatTracks", Form("Leading track #it{p}_{T} #in (%.2f, %.2f); Associated track #it{p}_{T} #in (%.2f, #it{p}_{T, lead. trk})", pTLeadTrack->at(0), pTLeadTrack->at(1), pTAssociatTrackMin.value), kTH2F, {{scaledFT0C}, {160, -1.28, 5.0, "#it{#varphi} (rad)"}});
spectra.add("hScaledFT0M_Correlation_LeadTrack_AssociatTracks", Form("Leading track #it{p}_{T} #in (%.2f, %.2f); Associated track #it{p}_{T} #in (%.2f, #it{p}_{T, lead. trk})", pTLeadTrack->at(0), pTLeadTrack->at(1), pTAssociatTrackMin.value), kTH2F, {{scaledFT0M}, {160, -1.28, 5.0, "#it{#varphi} (rad)"}});
}
}

Expand Down Expand Up @@ -1001,38 +1005,49 @@ struct RecoilJets {
void fillLeadingAndAssociatedTracksTask(JCollision const& collision, JTracks const& tracks, float weight = 1.)
{
std::vector<double> vPhiOfLeadingTracks;
std::vector<double> vPtOfLeadingTracks;
std::vector<double> vPhiOfAssociatedTracks;

float scaledFT0C = getScaledFT0(collision.multFT0C(), meanFT0C);
float scaledFT0M = getScaledFT0M(getScaledFT0(collision.multFT0A(), meanFT0A), scaledFT0C);

// Search for leading tracks
for (const auto& track : tracks) {
if (skipTrack(track))
continue;

float trackPt = track.pt();
float trackPhi = track.phi();

// Search for leading tracks
if (trackPt > pTLeadTrack->at(0) && trackPt < pTLeadTrack->at(1)) {
vPhiOfLeadingTracks.push_back(trackPhi);
}

// Search for associated tracks
if (trackPt > pTAssociatTrack->at(0) && trackPt < pTAssociatTrack->at(1)) {
vPhiOfAssociatedTracks.push_back(trackPhi);
vPhiOfLeadingTracks.push_back(track.phi());
vPtOfLeadingTracks.push_back(trackPt);
}
}

int nLeadingTracks = vPhiOfLeadingTracks.size();

if (nLeadingTracks > 0) {
double phiLeadingTrack = getPhiTT(vPhiOfLeadingTracks);
auto indexLeadTrack = rand->Integer(nLeadingTracks);

for (const auto& phiAssociatTrack : vPhiOfAssociatedTracks) {
double dphi = RecoDecay::constrainAngle(phiLeadingTrack - phiAssociatTrack, -1.3);
spectra.fill(HIST("hScaledFT0C_Correlation_LeadTrack_AssociatTracks"), scaledFT0C, dphi, weight);
spectra.fill(HIST("hScaledFT0M_Correlation_LeadTrack_AssociatTracks"), scaledFT0M, dphi, weight);
double phiLeadingTrack = vPhiOfLeadingTracks[indexLeadTrack];
double pTLeadingTrack = vPtOfLeadingTracks[indexLeadTrack];

spectra.fill(HIST("hScaledFT0C_NleadTracks"), scaledFT0C, 0.5, weight);
spectra.fill(HIST("hScaledFT0M_NleadTracks"), scaledFT0M, 0.5, weight);

for (const auto& track : tracks) {
if (skipTrack(track))
continue;

float trackPt = track.pt();
float trackPhi = track.phi();

// Search for associated tracks
if (trackPt > pTAssociatTrackMin && trackPt < pTLeadingTrack) {
double dphi = RecoDecay::constrainAngle(phiLeadingTrack - trackPhi, -1.3);
spectra.fill(HIST("hScaledFT0C_Correlation_LeadTrack_AssociatTracks"), scaledFT0C, dphi, weight);
spectra.fill(HIST("hScaledFT0M_Correlation_LeadTrack_AssociatTracks"), scaledFT0M, dphi, weight);
}
}
}
}
Expand Down
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