[PWGLF] Added centrality dependence of DCAxy cut and tighten DCAz cut (#15907)

Author: BanajitBarman

PWGLF/Tasks/Nuspex/spectraTOF.cxx

@@ -127,8 +127,10 @@ struct tofSpectra {
 
   struct : ConfigurableGroup {
     Configurable<float> cfgCutEtaMax{"cfgCutEtaMax", 0.8f, "Max eta range for tracks"};
+    Configurable<float> cfgCutdcaZMax{"cfgCutdcaZMax", 0.02f, "Max dcaZ range for tracks"};
     Configurable<float> cfgCutNsigma{"cfgCutNsigma", 100.0f, "nsigma cut range for tracks"};
     Configurable<float> cfgCutEtaMin{"cfgCutEtaMin", -0.8f, "Min eta range for tracks"};
+    Configurable<float> cfgCutdcaZMin{"cfgCutdcaZMin", -0.02f, "Min dcaZ range for tracks"};
     Configurable<float> cfgCutY{"cfgCutY", 0.5f, "Y range for tracks"};
     Configurable<int> lastRequiredTrdCluster{"lastRequiredTrdCluster", 5, "Last cluster to require in TRD for track selection. -1 does not require any TRD cluster"};
     Configurable<bool> requireTrdOnly{"requireTrdOnly", false, "Require only tracks from TRD"};
@@ -175,7 +177,7 @@ struct tofSpectra {
   Configurable<float> minChi2PerClusterTPC{"minChi2PerClusterTPC", 0.5f, "Additional cut on the minimum value of the chi2 per cluster in the TPC"};
   Configurable<float> maxChi2PerClusterITS{"maxChi2PerClusterITS", 36.f, "Additional cut on the maximum value of the chi2 per cluster in the ITS"};
   Configurable<float> maxDcaXYFactor{"maxDcaXYFactor", 1.f, "Additional cut on the maximum value of the DCA xy (multiplicative factor)"};
-  Configurable<float> maxDcaZ{"maxDcaZ", 2.f, "Additional cut on the maximum value of the DCA z"};
+  Configurable<float> maxDcaZ{"maxDcaZ", 0.02f, "Additional cut on the maximum value of the DCA z"};
   Configurable<float> minTPCNClsFound{"minTPCNClsFound", 100.f, "Additional cut on the minimum value of the number of found clusters in the TPC"};
   Configurable<bool> makeTHnSparseChoice{"makeTHnSparseChoice", false, "choose if produce thnsparse"}; // RD
   Configurable<bool> enableTPCTOFvsEtaHistograms{"enableTPCTOFvsEtaHistograms", false, "choose if produce TPC tof vs Eta"};
@@ -263,7 +265,7 @@ struct tofSpectra {
       LOG(info) << "\tminITSnClusters=" << minITSnClusters.value;
       LOG(info) << "\tminTPCNClsFound=" << minTPCNClsFound.value;
       LOG(info) << "\tmaxChi2PerClusterITS=" << maxChi2PerClusterITS.value;
-      LOG(info) << "\tmaxDcaZ=" << maxDcaZ.value;
+      LOG(info) << "\tmaxDcaZ=" << maxDcaZ;
       LOG(info) << "\tmakeTHnSparseChoice=" << makeTHnSparseChoice.value;
 
       customTrackCuts = getGlobalTrackSelectionRun3ITSMatch(itsPattern.value);
@@ -278,7 +280,7 @@ struct tofSpectra {
       customTrackCuts.SetMinNClustersTPC(minTPCNClsFound.value);
       customTrackCuts.SetMinNCrossedRowsOverFindableClustersTPC(minNCrossedRowsOverFindableClustersTPC.value);
       customTrackCuts.SetMaxDcaXYPtDep([](float /*pt*/) { return 10000.f; }); // No DCAxy cut will be used, this is done via the member function of the task
-      customTrackCuts.SetMaxDcaZ(maxDcaZ.value);
+      customTrackCuts.SetMaxDcaZ(maxDcaZ);
       customTrackCuts.print();
     }
     // Histograms
@@ -757,7 +759,7 @@ struct tofSpectra {
       if (enableDCAxyzHistograms) {
         hDcaXYZ[i] = histos.add<TH3>(Form("dca/%s/%s", (i < Np) ? "pos" : "neg", pN[i % Np]), pTCharge[i], kTH3D, {ptAxis, dcaXyAxis, dcaZAxis});
       } else {
-        histos.add(hdcaxy[i].data(), pTCharge[i], kTH2D, {ptAxis, dcaXyAxis});
+        histos.add(hdcaxy[i].data(), pTCharge[i], kTH3D, {ptAxis, dcaXyAxis, multAxis});
         histos.add(hdcaz[i].data(), pTCharge[i], kTH2D, {ptAxis, dcaZAxis});
       }
 
@@ -1127,15 +1129,15 @@ struct tofSpectra {
         }
       } else {
         if (track.sign() > 0) {
-          histos.fill(HIST(hdcaxy[id]), track.pt(), track.dcaXY());
+          histos.fill(HIST(hdcaxy[id]), track.pt(), track.dcaXY(), multiplicity);
           histos.fill(HIST(hdcaz[id]), track.pt(), track.dcaZ());
           if (isInPtRangeForPhi) {
             if (enableDCAxyphiHistograms) {
               histos.fill(HIST(hdcaxyphi[id]), track.phi(), track.dcaXY());
             }
           }
         } else {
-          histos.fill(HIST(hdcaxy[id + Np]), track.pt(), track.dcaXY());
+          histos.fill(HIST(hdcaxy[id + Np]), track.pt(), track.dcaXY(), multiplicity);
           histos.fill(HIST(hdcaz[id + Np]), track.pt(), track.dcaZ());
           if (isInPtRangeForPhi) {
             if (enableDCAxyphiHistograms) {
@@ -1305,6 +1307,9 @@ struct tofSpectra {
     if (track.eta() < trkselOptions.cfgCutEtaMin || track.eta() > trkselOptions.cfgCutEtaMax) {
       return false;
     }
+    if (track.dcaZ() < trkselOptions.cfgCutdcaZMin || track.dcaZ() > trkselOptions.cfgCutdcaZMax) {
+      return false;
+    }
     if constexpr (fillHistograms) {
       histos.fill(HIST("tracksel"), 2);
       if (enableTrackCutHistograms) {