[PWGLF] Add QC histo for event selection (#8592)

Co-authored-by: ALICE Action Bot <alibuild@cern.ch>

Author: chiarapinto

PWGLF/Tasks/Nuspex/nuclei_in_jets.cxx

@@ -154,6 +154,7 @@ struct nuclei_in_jets {
     registryQC.add("sumPtUE", "sumPtUE", HistType::kTH1F, {{500, 0, 50, "#it{p}_{T} (GeV/#it{c})"}});
     registryQC.add("nJets_found", "nJets_found", HistType::kTH1F, {{10, 0, 10, "#it{n}_{Jet}"}});
     registryQC.add("nJets_selected", "nJets_selected", HistType::kTH1F, {{10, 0, 10, "#it{n}_{Jet}"}});
+    registryQC.add("event_selection_jets", "event_selection_jets", HistType::kTH1F, {{10, 0, 10, "counter"}});
     registryQC.add("dcaxy_vs_pt", "dcaxy_vs_pt", HistType::kTH2F, {{100, 0.0, 5.0, "#it{p}_{T} (GeV/#it{c})"}, {2000, -0.05, 0.05, "DCA_{xy} (cm)"}});
     registryQC.add("dcaz_vs_pt", "dcaz_vs_pt", HistType::kTH2F, {{100, 0.0, 5.0, "#it{p}_{T} (GeV/#it{c})"}, {2000, -0.05, 0.05, "DCA_{z} (cm)"}});
     registryQC.add("jet_ue_overlaps", "jet_ue_overlaps", HistType::kTH2F, {{20, 0.0, 20.0, "#it{n}_{jet}"}, {200, 0.0, 200.0, "#it{n}_{overlaps}"}});
@@ -440,6 +441,7 @@ struct nuclei_in_jets {
   {
     // Event Counter: before event selection
     registryData.fill(HIST("number_of_events_data"), 0.5);
+    registryQC.fill(HIST("event_selection_jets"), 0.5); // all events before jet selection
 
     // Event Selection
     if (!collision.sel8())
@@ -591,8 +593,27 @@ struct nuclei_in_jets {
     if (n_jets_selected == 0)
       return;
     registryData.fill(HIST("number_of_events_data"), 3.5);
+    registryQC.fill(HIST("event_selection_jets"), 1.5); // events with pTjet>10 GeV/c selected
     //************************************************************************************************************************************
 
+    // Leading Track
+    double pt_max(0);
+
+    // Loop over Reconstructed Tracks
+    for (auto const& track : tracks) {
+
+      if (!passedTrackSelectionForJetReconstruction(track))
+        continue;
+
+      if (track.pt() > pt_max) {
+        pt_max = track.pt();
+      }
+    }
+    // Event Counter: Skip Events with pt<pt_leading_min
+    if (pt_max < 5.0)
+      return;
+    registryQC.fill(HIST("event_selection_jets"), 2.5); // events with pTleading > 5 GeV/c selected
+
     // Overlaps
     int nOverlaps(0);
     for (int i = 0; i < static_cast<int>(jet.size()); i++) {