[PWGHF] Updated to Z->ee trig. study

PWGHF/HFL/Tasks/taskElectronWeakBoson.cxx

@@ -104,6 +104,7 @@ struct HfTaskElectronWeakBoson {
 
   Configurable<float> rIsolation{"rIsolation", 0.3, "cone radius for isolation cut"};
   Configurable<float> energyIsolationMax{"energyIsolationMax", 0.1, "isolation cut on energy"};
+  Configurable<float> momentumIsolationMax{"momentumIsolationMax", 0.1, "isolation cut on momentum"};
   Configurable<int> trackIsolationMax{"trackIsolationMax", 3, "Maximum number of tracks in isolation cone"};
 
   Configurable<float> massZMin{"massZMin", 60.0, "Minimum Z mass (GeV/c^2)"};
@@ -236,18 +237,18 @@ struct HfTaskElectronWeakBoson {
     const AxisSpec axisNcell{50, 0.0, 50.0, "Ncell"};
     const AxisSpec axisPhi{350, 0, 7, "Phi"};
     const AxisSpec axisEop{200, 0, 2, "E/p"};
-    const AxisSpec axisEopZneg{200, 0, 2, "E/p neg"};
-    const AxisSpec axisEopZpos{200, 0, 2, "E/p pos"};
+    const AxisSpec axisEopZneg{300, -0.01, 1.49, "E/p neg"};
+    const AxisSpec axisEopZpos{300, -0.01, 1.49, "E/p pos"};
     const AxisSpec axisChi2{250, 0.0, 25.0, "#chi^{2}"};
     const AxisSpec axisCluster{100, 0.0, 200.0, "counts"};
     const AxisSpec axisITSNCls{10, 0.0, 10, "counts"};
     const AxisSpec axisEMCtime{100, -50.0, 50, "EMC time"};
     const AxisSpec axisIsoEnergy{100, 0, 1.0, "E_{iso}"};
-    const AxisSpec axisIsoEnergyZneg{100, 0, 1.0, "E_{iso,neg}"};
-    const AxisSpec axisIsoEnergyZpos{100, 0, 1.0, "E_{iso,pos}"};
+    const AxisSpec axisIsoEnergyZneg{255, 0, 1.5, "E_{iso,neg}"};
+    const AxisSpec axisIsoEnergyZpos{255, 0, 1.5, "E_{iso,pos}"};
     const AxisSpec axisIsoMomentum{100, 0, 10.0, "Isolation momentum(GeV/C)"};
-    const AxisSpec axisIsoMomentumZneg{100, 0, 10.0, "p_{iso,neg}"};
-    const AxisSpec axisIsoMomentumZpos{100, 0, 10.0, "p_{iso,pos}"};
+    const AxisSpec axisIsoMomentumZneg{255, 0, 2.0, "p_{iso,neg}"};
+    const AxisSpec axisIsoMomentumZpos{255, 0, 2.0, "p_{iso,pos}"};
     const AxisSpec axisIsoTrack{25, -0.5, 24.5, "Isolation Track"};
     const AxisSpec axisIsoTrackZneg{25, -0.5, 24.5, "N_{isotrk,neg}"};
     const AxisSpec axisIsoTrackZpos{25, -0.5, 24.5, "N_{isotrk,pos}"};
@@ -289,7 +290,8 @@ struct HfTaskElectronWeakBoson {
     registry.add("hInvMassZee", "invariant mass for Z ULS pair", HistType::kTHnSparseF, {axisCentrality, axisSign, axisPt, axisInvMassZgamma});
     registry.add("hKfInvMassZee", "invariant mass for Z ULS pair KFp", HistType::kTHnSparseF, {axisCentrality, axisSign, axisPt, axisInvMassZgamma});
     registry.add("hInvMassZeeQA", "QA for invariant mass for Z", HistType::kTHnSparseF, {axisInvMassZ, axisPtZneg, axisPtZpos, axisDCAxyneg, axisDCAxypos, axisDCAzpos, axisNclsTPCneg, axisNclsTPCpos, axisNclsITSneg, axisNclsITSpos, axisSectorTPCneg, axisSectorTPCneg, axisEopZneg, axisEopZpos, axisIsoEnergyZneg, axisIsoEnergyZpos, axisIsoMomentumZneg, axisIsoMomentumZpos, axisIsoTrackZneg, axisIsoTrackZpos});
-    registry.add("hTHnElectrons", "electron info", HistType::kTHnSparseF, {axisPt, axisNsigma, axisM02, axisEop, axisIsoEnergy, axisIsoTrack, axisEta, axisDedx});
+    registry.add("hInvMassZeeQAbg", "QA for invariant mass for Z", HistType::kTHnSparseF, {axisInvMassZ, axisPtZneg, axisPtZpos, axisDCAxyneg, axisDCAxypos, axisDCAzpos, axisNclsTPCneg, axisNclsTPCpos, axisNclsITSneg, axisNclsITSpos, axisSectorTPCneg, axisSectorTPCneg, axisEopZneg, axisEopZpos, axisIsoEnergyZneg, axisIsoEnergyZpos, axisIsoMomentumZneg, axisIsoMomentumZpos, axisIsoTrackZneg, axisIsoTrackZpos});
+    registry.add("hTHnElectrons", "electron info", HistType::kTHnSparseF, {axisPt, axisNsigma, axisM02, axisEop, axisIsoEnergy, axisIsoMomentum, axisIsoTrack, axisEta, axisDedx});
     registry.add("hTHnTrMatch", "Track EMC Match", HistType::kTHnSparseF, {axisPt, axisdPhi, axisdEta});
 
     // Z-hadron correlation histograms
@@ -390,6 +392,10 @@ struct HfTaskElectronWeakBoson {
       if (track.sign() > 0) {
         pdgAss = kPositron;
       }
+      auto [trackCount, isoMomentum] = getIsolatedTrack(track.eta(), track.phi(), track.p(), tracks);
+      if (isoMomentum > momentumIsolationMax) {
+        continue;
+      }
 
       KFPTrack kfpTrackAssEle = createKFPTrackFromTrack(track);
       KFParticle kfpAssEle(kfpTrackAssEle, pdgAss);
@@ -540,7 +546,7 @@ struct HfTaskElectronWeakBoson {
       registry.fill(HIST("hPt"), track.pt());
       registry.fill(HIST("hTPCNsigma"), track.p(), track.tpcNSigmaEl());
 
-      float eop = 0.0;
+      float eop = -0.01;
       float isoEnergy = 1.0;
       // track isolation
       auto [trackCount, isoMomentum] = getIsolatedTrack(track.eta(), track.phi(), track.p(), tracks);
@@ -631,7 +637,7 @@ struct HfTaskElectronWeakBoson {
             isoEnergy = getIsolatedCluster(cluster, emcClusters);
 
             if (match.track_as<TrackEle>().pt() > ptTHnThresh && isTHnElectron) {
-              registry.fill(HIST("hTHnElectrons"), match.track_as<TrackEle>().pt(), match.track_as<TrackEle>().tpcNSigmaEl(), m02Emc, eop, isoEnergy, trackCount, track.eta(), track.tpcSignal());
+              registry.fill(HIST("hTHnElectrons"), match.track_as<TrackEle>().pt(), match.track_as<TrackEle>().tpcNSigmaEl(), m02Emc, eop, isoEnergy, isoMomentum, trackCount, track.eta(), track.tpcSignal());
             }
             // LOG(info) << "E/p" << eop;
             registry.fill(HIST("hEopNsigTPC"), match.track_as<TrackEle>().tpcNSigmaEl(), eop);
@@ -643,7 +649,7 @@ struct HfTaskElectronWeakBoson {
               registry.fill(HIST("hEop"), match.track_as<TrackEle>().pt(), eop);
               if (eop > eopMin && eop < eopMax && isoEnergy < energyIsolationMax)
                 isIsolated = true;
-              if (eop > eopMin && eop < eopMax && trackCount < trackIsolationMax)
+              if (eop > eopMin && eop < eopMax && trackCount < trackIsolationMax && isoMomentum < momentumIsolationMax)
                 isIsolatedTr = true;
 
               if (isIsolated && isIsolatedTr) {
@@ -729,6 +735,7 @@ struct HfTaskElectronWeakBoson {
     // Z->ee QA
     if (enableZeeRecoQA) {
       if (selectedElectronsIso.size() > 0 && selectedPositronsIso.size() > 0) {
+        // signal
         for (const auto& trackEle : selectedElectronsIso) {
           for (const auto& trackPos : selectedPositronsIso) {
             auto child1 = RecoDecayPtEtaPhi::pVector(trackEle.pt, trackEle.eta, trackEle.phi);
@@ -737,12 +744,43 @@ struct HfTaskElectronWeakBoson {
             if (invMass > massZMinQA) {
               float sectorneg = trackEle.phi / o2::constants::math::SectorSpanRad;
               float sectorpos = trackPos.phi / o2::constants::math::SectorSpanRad;
-              // LOG(info) << "TPC sector= " << sectorneg << " ; " << sectorpos;
               registry.fill(HIST("hInvMassZeeQA"), invMass, trackEle.pt, trackPos.pt, trackEle.dcaxyTrk, trackPos.dcaxyTrk, trackPos.dcazTrk, trackEle.nclusterTPC, trackPos.nclusterTPC, trackEle.nclusterITS, trackPos.nclusterITS, sectorneg, sectorpos, trackEle.eop, trackPos.eop, trackEle.energyIso, trackPos.energyIso, trackEle.momIso, trackPos.momIso, trackEle.ntrackIso, trackPos.ntrackIso);
             }
           }
         }
-      }
+        // bg e-e-
+        for (const auto& trackEle : selectedElectronsIso) {
+          for (const auto& trackEle2 : selectedElectronsIso) {
+            if (trackEle.pt == trackEle2.pt) {
+              continue;
+            }
+            auto child1 = RecoDecayPtEtaPhi::pVector(trackEle.pt, trackEle.eta, trackEle.phi);
+            auto child2 = RecoDecayPtEtaPhi::pVector(trackEle2.pt, trackEle2.eta, trackEle2.phi);
+            double invMass = RecoDecay::m(std::array{child1, child2}, std::array{o2::constants::physics::MassElectron, o2::constants::physics::MassElectron});
+            if (invMass > massZMinQA) {
+              float sectorneg = trackEle.phi / o2::constants::math::SectorSpanRad;
+              float sectorpos = trackEle2.phi / o2::constants::math::SectorSpanRad;
+              registry.fill(HIST("hInvMassZeeQAbg"), invMass, trackEle.pt, trackEle2.pt, trackEle.dcaxyTrk, trackEle2.dcaxyTrk, trackEle2.dcazTrk, trackEle.nclusterTPC, trackEle2.nclusterTPC, trackEle.nclusterITS, trackEle2.nclusterITS, sectorneg, sectorpos, trackEle.eop, trackEle2.eop, trackEle.energyIso, trackEle2.energyIso, trackEle.momIso, trackEle2.momIso, trackEle.ntrackIso, trackEle2.ntrackIso);
+            }
+          }
+        }
+        // bg e+e+
+        for (const auto& trackPos : selectedPositronsIso) {
+          for (const auto& trackPos2 : selectedPositronsIso) {
+            if (trackPos.pt == trackPos2.pt) {
+              continue;
+            }
+            auto child1 = RecoDecayPtEtaPhi::pVector(trackPos.pt, trackPos.eta, trackPos.phi);
+            auto child2 = RecoDecayPtEtaPhi::pVector(trackPos2.pt, trackPos2.eta, trackPos2.phi);
+            double invMass = RecoDecay::m(std::array{child1, child2}, std::array{o2::constants::physics::MassElectron, o2::constants::physics::MassElectron});
+            if (invMass > massZMinQA) {
+              float sectorneg = trackPos.phi / o2::constants::math::SectorSpanRad;
+              float sectorpos = trackPos2.phi / o2::constants::math::SectorSpanRad;
+              registry.fill(HIST("hInvMassZeeQAbg"), invMass, trackPos.pt, trackPos2.pt, trackPos.dcaxyTrk, trackPos2.dcaxyTrk, trackPos2.dcazTrk, trackPos.nclusterTPC, trackPos2.nclusterTPC, trackPos.nclusterITS, trackPos2.nclusterITS, sectorneg, sectorpos, trackPos.eop, trackPos2.eop, trackPos.energyIso, trackPos2.energyIso, trackPos.momIso, trackPos2.momIso, trackPos.ntrackIso, trackPos2.ntrackIso);
+            }
+          }
+        }
+      } // check arrays aren't empty
     } // end of Z->ee QA
   } // process
 }; // struct HfTaskElectronWeakBoson