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[PWGJE] change logic for estimation of bkgd fluctuation in events with TTsig #16851

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Merged
nzardosh merged 1 commit into from
Jun 29, 2026
+36 −23
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[PWGJE] change logic for estimation of bkgd fluctuation in events with TTsig #16851

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59 changes: 36 additions & 23 deletions PWGJE/Tasks/recoilJets.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -1128,8 +1128,8 @@ struct RecoilJets {
Form("Bkgd fluctuations RC with #it{R} = %.1f avoid lead, sublead jet in vic. %.1f vs. EA", bkgd.randomConeR.value, bkgd.minDeltaRToJet.value),
kTH2F, {{eaAxis.axis}, {400, -40., 60., "#delta#it{p}_{T} (GeV/#it{c})"}}, hist.sumw2);

spectra.add(Form("hScaled%s_deltaPtRandomConeInEventTTSig", eaAxis.label),
Form("Bkgd fluctuations RC with #it{R} = %.1f in events with TT{%.0f, %.0f} in vic. %.1f vs. EA", bkgd.randomConeR.value, ptTTsigMin, ptTTsigMax, bkgd.minDeltaRToJet.value),
spectra.add(Form("hScaled%s_deltaPtPerpConeTTSig", eaAxis.label),
Form("Bkgd fluctuations PC with #it{R} = %.1f in events with TT{%.0f, %.0f} vs. EA", bkgd.randomConeR.value, ptTTsigMin, ptTTsigMax),
kTH2F, {{eaAxis.axis}, {400, -40., 60., "#delta#it{p}_{T} (GeV/#it{c})"}}, hist.sumw2);
}
}
Expand All @@ -1153,7 +1153,7 @@ struct RecoilJets {
Form("Bkgd fluctuations RC with #it{R} = %.1f avoid lead, sublead jet in vic. %.1f vs. EA", bkgd.randomConeR.value, bkgd.minDeltaRToJet.value),
kTH2F, {{eaAxis.axis}, {400, -40., 60., "#delta#it{p}_{T} (GeV/#it{c})"}}, hist.sumw2);

spectra.add(Form("hScaled%s_deltaPtRandomConeInEventTTSig_PartLevel", eaAxis.label),
spectra.add(Form("hScaled%s_deltaPtPerpConeTTSig_PartLevel", eaAxis.label),
Form("Bkgd fluctuations RC with #it{R} = %.1f in events with TT{%.0f, %.0f} in vic. %.1f vs. EA", bkgd.randomConeR.value, ptTTsigMin, ptTTsigMax, bkgd.minDeltaRToJet.value),
kTH2F, {{eaAxis.axis}, {400, -40., 60., "#delta#it{p}_{T} (GeV/#it{c})"}}, hist.sumw2);
}
Expand Down Expand Up @@ -2480,6 +2480,7 @@ struct RecoilJets {

uint64_t index = 0;
for (const auto& track : tracks) {
++index;
if (skipTrack(track))
continue;

Expand All @@ -2495,9 +2496,8 @@ struct RecoilJets {
const auto ptTTsigMin = tt.sigPtRange->at(0);
const auto ptTTsigMax = tt.sigPtRange->at(1);
if (track.pt() > ptTTsigMin && track.pt() < ptTTsigMax) {
vCandForTT.emplace_back(index);
vCandForTT.emplace_back(index - 1);
}
++index;
}
spectra.fill(HIST("hScaledFT0C_deltaPtRandomCone"), scaledFT0C, randomConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0M_deltaPtRandomCone"), scaledFT0M, randomConePt - areaRC * rho, weight);
Expand Down Expand Up @@ -2590,19 +2590,6 @@ struct RecoilJets {
float dEtaSubleadJet = std::pow(subleadJetEta - randomConeEta, 2);
float dPhiSubleadJet = std::pow(RecoDecay::constrainAngle(subleadJetPhi - randomConePhi, -constants::math::PI), 2);

// Try to add events with TTsig
bool keepEventWithTT = false;
if (vCandForTT.size() > 0) // at least 1 TT
{
auto randIndexTrack = randGen->Integer(vCandForTT.size());
auto objTT = tracks.iteratorAt(vCandForTT[randIndexTrack]);

// Skip events where TT is not a part of leading or subleading jets (mutlijet event, difficult to place RC and avoid hard jets)
if (isTrackInJet(jets.iteratorAt(0), objTT) || isTrackInJet(jets.iteratorAt(1), objTT)) {
keepEventWithTT = true;
}
}

//----------------------------------------------------------
bool isTherePlaceForRC = false;
for (int attempt = 0; attempt < maxAttempts; ++attempt) {
Expand Down Expand Up @@ -2637,11 +2624,37 @@ struct RecoilJets {
}
spectra.fill(HIST("hScaledFT0C_deltaPtRandomConeAvoidLeadAndSubleadJet"), scaledFT0C, randomConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0M_deltaPtRandomConeAvoidLeadAndSubleadJet"), scaledFT0M, randomConePt - areaRC * rho, weight);
}
}

if (keepEventWithTT) {
spectra.fill(HIST("hScaledFT0C_deltaPtRandomConeInEventTTSig"), scaledFT0C, randomConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0M_deltaPtRandomConeInEventTTSig"), scaledFT0M, randomConePt - areaRC * rho, weight);
//----------------------------------------------------------
// Place cone perpendicular to TTSig candidate
if (vCandForTT.size() > 0) // at least 1 TT
{
auto randIndexTrack = randGen->Integer(vCandForTT.size());
auto objTT = tracks.iteratorAt(vCandForTT[randIndexTrack]);

float perpTTConeEta = objTT.eta();
float perpTTConePhi = RecoDecay::constrainAngle(objTT.phi() + constants::math::PIHalf, 0.0f);

// Keep the full cone inside the track acceptance
if (std::abs(perpTTConeEta) < (trk.etaCut - bkgd.randomConeR)) {
float perpTTConePt = 0.0;
for (const auto& track : tracks) {
if (skipTrack(track))
continue;

float dEta = std::pow(perpTTConeEta - track.eta(), 2);
float dPhi = std::pow(RecoDecay::constrainAngle(perpTTConePhi - track.phi(), -constants::math::PI), 2);

if ((dEta + dPhi) < radiusRC2) // inside TT perpendicular cone
{
perpTTConePt += track.pt();
}
}

spectra.fill(HIST("hScaledFT0C_deltaPtPerpConeTTSig"), scaledFT0C, perpTTConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0M_deltaPtPerpConeTTSig"), scaledFT0M, perpTTConePt - areaRC * rho, weight);
}
}
}
Expand Down Expand Up @@ -2831,8 +2844,8 @@ struct RecoilJets {
spectra.fill(HIST("hScaledFT0M_deltaPtRandomConeAvoidLeadAndSubleadJet_PartLevel"), scaledFT0M, randomConePt - areaRC * rho, weight);

if (keepEventWithTT) {
spectra.fill(HIST("hScaledFT0C_deltaPtRandomConeInEventTTSig_PartLevel"), scaledFT0C, randomConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0M_deltaPtRandomConeInEventTTSig_PartLevel"), scaledFT0M, randomConePt - areaRC * rho, weight);
spectra.fill(HIST("hScaledFT0C_deltaPtPerpConeTTSig_PartLevel"), scaledFT0C, randomConePt - areaRC * rho, weight);

@nzardosh nzardosh Jun 29, 2026

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this is intended to be a random cone and not a perpendicular cone?

spectra.fill(HIST("hScaledFT0M_deltaPtPerpConeTTSig_PartLevel"), scaledFT0M, randomConePt - areaRC * rho, weight);
}
}
}
Expand Down
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