[PWGLF] Add generator for antideuterons in jets

Author: alcaliva

MC/config/PWGLF/ini/GeneratorLFAntideuteronInJets.ini

@@ -0,0 +1,7 @@
+[GeneratorExternal]
+fileName=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator_pythia8_longlived_gaptriggered.C
+funcName=generateLongLivedGapTriggered("${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGLF/pythia8/generator/antideuteron.gun", 2, false)
+
+[GeneratorPythia8]
+config=${O2DPG_MC_CONFIG_ROOT}/MC/config/PWGGAJE/pythia8/generator/pythia8_jet.cfg
+includePartonEvent=false

MC/config/PWGLF/ini/tests/GeneratorLFAntideuteronInJets.C

@@ -0,0 +1,61 @@
+int External()
+{
+  std::string path{"o2sim_Kine.root"};
+  int numberOfInjectedSignalsPerEvent{1};
+
+  std::vector<int> injectedPDGs = {
+    -1000010020 // anti-deuteron
+  };
+
+  auto nInjection = injectedPDGs.size();
+
+  TFile file(path.c_str(), "READ");
+  if (file.IsZombie()) {
+    std::cerr << "Cannot open ROOT file " << path << "\n";
+    return 1;
+  }
+
+  auto tree = (TTree*)file.Get("o2sim");
+  if (!tree) {
+    std::cerr << "Cannot find tree o2sim in file " << path << "\n";
+    return 1;
+  }
+
+  std::vector<o2::MCTrack>* tracks{};
+  tree->SetBranchAddress("MCTrack", &tracks);
+
+  std::vector<int> nSignal(nInjection, 0);
+
+  auto nEvents = tree->GetEntries();
+
+  for (int i = 0; i < nEvents; i++) {
+    tree->GetEntry(i);
+
+    for (int idxMCTrack = 0; idxMCTrack < tracks->size(); ++idxMCTrack) {
+      auto track = tracks->at(idxMCTrack);
+      auto pdg = track.GetPdgCode();
+
+      auto it = std::find(injectedPDGs.begin(), injectedPDGs.end(), pdg);
+
+      if (it != injectedPDGs.end()) {
+        int index = std::distance(injectedPDGs.begin(), it);
+        nSignal[index]++;
+      }
+    }
+  }
+
+  std::cout << "--------------------------------\n";
+  std::cout << "# Events: " << nEvents << "\n";
+
+  for (int i = 0; i < nInjection; i++) {
+    std::cout << "# Injected particles\n";
+    std::cout << injectedPDGs[i] << ": " << nSignal[i] << "\n";
+
+    if (nSignal[i] == 0) {
+      std::cerr << "No generated: " << injectedPDGs[i] << "\n";
+      return 1;
+    }
+  }
+
+  return 0;
+}

MC/config/PWGLF/pythia8/generator/antideuteron.gun

@@ -0,0 +1,2 @@
+# PDG           N      ptMin   ptMax   yMin   yMax
+-1000010020     1      0.5     10      -1     1