PWGHF: add config for Pb-Pb MCs without pt hard bins for signal

MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C

@@ -45,12 +45,13 @@ public:
 
     /// @brief setup the event generator for HF signals
     /// \param gentype generator type (only ccbar, only bbbar, both)
+    /// \param usePtHardBins flag to enable/disable pt-hard bins
     /// \param yQuarkMin minimum quark rapidity
     /// \param yQuarkMax maximum quark rapidity
     /// \param yHadronMin minimum hadron rapidity
     /// \param yHadronMax maximum hadron rapidity
     /// \param hadronPdgList list of PDG codes for hadrons to be used in trigger
-    void setupGeneratorEvHF(int genType, float yQuarkMin, float yQuarkMax, float yHadronMin, float yHadronMax, std::vector<int> hadronPdgList = {}) {
+    void setupGeneratorEvHF(int genType, bool usePtHardBins, float yQuarkMin, float yQuarkMax, float yHadronMin, float yHadronMax, std::vector<int> hadronPdgList = {}) {
         mGeneratorEvHF = nullptr;
         switch (genType)
         {
@@ -80,18 +81,20 @@ public:
         }
 
         // we set pT hard bins
-        auto seed = dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->getUsedSeed();
-        float ptHardBins[4] = {2.76, 20., 50., 1000.};
-        int iPt{0};
-        if (seed % 10 < 7) {
-            iPt = 0;
-        } else if (seed % 10 < 9) {
-            iPt = 1;
-        } else {
-            iPt = 2;
+        if (usePtHardBins) {
+            auto seed = dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->getUsedSeed();
+            float ptHardBins[4] = {2.76, 20., 50., 1000.};
+            int iPt{0};
+            if (seed % 10 < 7) {
+                iPt = 0;
+            } else if (seed % 10 < 9) {
+                iPt = 1;
+            } else {
+                iPt = 2;
+            }
+            dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->readString(Form("PhaseSpace:pTHatMin = %f", ptHardBins[iPt]));
+            dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->readString(Form("PhaseSpace:pTHatMax = %f", ptHardBins[iPt+1]));
         }
-        dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->readString(Form("PhaseSpace:pTHatMin = %f", ptHardBins[iPt]));
-        dynamic_cast<GeneratorPythia8GapTriggeredHF*>(mGeneratorEvHF)->readString(Form("PhaseSpace:pTHatMax = %f", ptHardBins[iPt+1]));
         mGeneratorEvHF->Init();
     }
 
@@ -377,34 +380,34 @@ private:
 };
 
 // Charm enriched
-FairGenerator * GeneratorPythia8EmbedHFCharm(float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
+FairGenerator * GeneratorPythia8EmbedHFCharm(bool usePtHardBins = false, float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
 {
     auto myGen = new GeneratorPythia8EmbedHF();
 
     /// setup the internal generator for HF events
-    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredCharm, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
+    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredCharm, usePtHardBins, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
 
     return myGen;
 }
 
 // Beauty enriched
-FairGenerator * GeneratorPythia8EmbedHFBeauty(float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
+FairGenerator * GeneratorPythia8EmbedHFBeauty(bool usePtHardBins = false, float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
 {
     auto myGen = new GeneratorPythia8EmbedHF();
 
     /// setup the internal generator for HF events
-    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredBeauty, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
+    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredBeauty, usePtHardBins, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
 
     return myGen;
 }
 
 // Charm and beauty enriched (with same ratio)
-FairGenerator * GeneratorPythia8EmbedHFCharmAndBeauty(float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
+FairGenerator * GeneratorPythia8EmbedHFCharmAndBeauty(bool usePtHardBins = false, float yQuarkMin = -1.5, float yQuarkMax = 1.5, float yHadronMin = -1.5, float yHadronMax = 1.5, std::vector<int> hadronPdgList = {})
 {
     auto myGen = new GeneratorPythia8EmbedHF();
 
     /// setup the internal generator for HF events
-    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredCharmAndBeauty, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
+    myGen->setupGeneratorEvHF(hf_generators::GapTriggeredCharmAndBeauty, usePtHardBins, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
 
     return myGen;
 }

MC/config/PWGHF/ini/GeneratorHF_D2H_ccbar_and_bbbar_PbPb_ptHardBins.ini

@@ -0,0 +1,8 @@
+### The external generator derives from GeneratorPythia8.
+[GeneratorExternal]
+fileName=${O2DPG_ROOT}/MC/config/PWGHF/external/generator/generator_pythia8_embed_hf.C
+funcName=GeneratorPythia8EmbedHFCharmAndBeauty(true)
+
+[GeneratorPythia8]
+config=${O2DPG_ROOT}/MC/config/PWGHF/pythia8/generator/pythia8_charmhadronic_with_decays_Mode2_hardQCD_5TeV.cfg
+includePartonEvent=true

MC/config/PWGHF/ini/tests/GeneratorHF_D2H_ccbar_and_bbbar_PbPb_ptHardBins.C

@@ -0,0 +1,134 @@
+int External() {
+    std::string path{"o2sim_Kine.root"};
+    //std::string path{"tf1/sgn_1_Kine.root"};
+
+    int checkPdgQuarkOne{4};
+    int checkPdgQuarkTwo{5};
+    float ratioTrigger = 1.; // one event triggered out of 1
+    float averagePt = 0.;
+
+    std::vector<int> checkPdgHadron{411, 421, 431, 4122, 4132, 4232, 4332};
+    std::map<int, std::vector<std::vector<int>>> checkHadronDecays{ // sorted pdg of daughters
+        {411, {{-321, 211, 211}, {-313, 211}, {211, 311}, {211, 333}}}, // D+
+        {421, {{-321, 211}, {-321, 111, 211}}}, // D0
+        {431, {{211, 333}, {-313, 321}}}, // Ds+
+        {4122, {{-313, 2212}, {-321, 2224}, {211, 102134}, {-321, 211, 2212}, {311, 2212}}}, // Lc+
+        {4132, {{211, 3312}}}, // Xic0
+        {4232, {{-313, 2212}, {-321, 3324}, {211, 211, 3312}, {-321, 211, 2212}}}, // Xic+
+        {4332, {{211, 3334}}} // Omegac+
+    };
+
+    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");
+    std::vector<o2::MCTrack> *tracks{};
+    tree->SetBranchAddress("MCTrack", &tracks);
+    o2::dataformats::MCEventHeader *eventHeader = nullptr;
+    tree->SetBranchAddress("MCEventHeader.", &eventHeader);
+
+    int nEventsMB{}, nEventsInjOne{}, nEventsInjTwo{};
+    int nQuarksOne{}, nQuarksTwo{}, nSignals{}, nSignalGoodDecay{};
+    auto nEvents = tree->GetEntries();
+
+    for (int i = 0; i < nEvents; i++) {
+        tree->GetEntry(i);
+
+        // check subgenerator information
+        //if (eventHeader->hasInfo(o2::mcgenid::GeneratorProperty::SUBGENERATORID)) {
+        //    bool isValid = false;
+        //    int subGeneratorId = eventHeader->getInfo<int>(o2::mcgenid::GeneratorProperty::SUBGENERATORID, isValid);
+        //    if (subGeneratorId == 0) {
+        //        nEventsMB++;
+        //    } else if (subGeneratorId == checkPdgQuarkOne) {
+        //        nEventsInjOne++;
+        //    } else if (subGeneratorId == checkPdgQuarkTwo) {
+        //        nEventsInjTwo++;
+        //    }
+        //}
+
+        for (auto &track : *tracks) {
+            auto pdg = track.GetPdgCode();
+            if (std::abs(pdg) == checkPdgQuarkOne) {
+                nQuarksOne++;
+                continue;
+            }
+            if (std::abs(pdg) == checkPdgQuarkTwo) {
+                nQuarksTwo++;
+                continue;
+            }
+            if (std::find(checkPdgHadron.begin(), checkPdgHadron.end(), std::abs(pdg)) != checkPdgHadron.end()) { // found signal
+                nSignals++; // count signal PDG
+                averagePt += track.GetPt();
+
+                std::vector<int> pdgsDecay{};
+                std::vector<int> pdgsDecayAntiPart{};
+                for (int j{track.getFirstDaughterTrackId()}; j <= track.getLastDaughterTrackId(); ++j) {
+                    auto pdgDau = tracks->at(j).GetPdgCode();
+                    pdgsDecay.push_back(pdgDau);
+                    if (pdgDau != 333) { // phi is antiparticle of itself
+                        pdgsDecayAntiPart.push_back(-pdgDau);
+                    } else {
+                        pdgsDecayAntiPart.push_back(pdgDau);
+                    }
+                }
+
+                std::sort(pdgsDecay.begin(), pdgsDecay.end());
+                std::sort(pdgsDecayAntiPart.begin(), pdgsDecayAntiPart.end());
+
+                for (auto &decay : checkHadronDecays[std::abs(pdg)]) {
+                    if (pdgsDecay == decay || pdgsDecayAntiPart == decay) {
+                        nSignalGoodDecay++;
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    averagePt /= nSignals; 
+
+    std::cout << "--------------------------------\n";
+    std::cout << "# Events: " << nEvents << "\n";
+    //std::cout << "# MB events: " << nEventsMB << "\n";
+    //std::cout << Form("# events injected with %d quark pair: ", checkPdgQuarkOne) << nEventsInjOne << "\n";
+    //std::cout << Form("# events injected with %d quark pair: ", checkPdgQuarkTwo) << nEventsInjTwo << "\n";
+    std::cout << Form("# %d (anti)quarks: ", checkPdgQuarkOne) << nQuarksOne << "\n";
+    std::cout << Form("# %d (anti)quarks: ", checkPdgQuarkTwo) << nQuarksTwo << "\n";
+    std::cout <<"# signal hadrons: " << nSignals << "\n";
+    std::cout <<"# signal hadrons decaying in the correct channel: " << nSignalGoodDecay << "\n";
+    std::cout <<"average pT of signal hadrons: " << averagePt << "\n";
+
+    //if (nEventsMB < nEvents * (1 - ratioTrigger) * 0.95 || nEventsMB > nEvents * (1 - ratioTrigger) * 1.05) { // we put some tolerance since the number of generated events is small
+    //    std::cerr << "Number of generated MB events different than expected\n";
+    //    return 1;
+    //}
+    //if (nEventsInjOne < nEvents * ratioTrigger * 0.5 * 0.95 || nEventsInjOne > nEvents * ratioTrigger * 0.5 * 1.05) {
+    //    std::cerr << "Number of generated events injected with " << checkPdgQuarkOne << " different than expected\n";
+    //    return 1;
+    //}
+    //if (nEventsInjTwo < nEvents * ratioTrigger * 0.5 * 0.95 || nEventsInjTwo > nEvents * ratioTrigger * 0.5 * 1.05) {
+    //    std::cerr << "Number of generated events injected with " << checkPdgQuarkTwo << " different than expected\n";
+    //    return 1;
+    //}
+
+    if (nQuarksOne < nEvents * ratioTrigger) { // we expect anyway more because the same quark is repeated several time, after each gluon radiation
+        std::cerr << "Number of generated (anti)quarks " << checkPdgQuarkOne << " lower than expected\n";
+        return 1;
+    }
+    if (nQuarksTwo < nEvents * ratioTrigger) { // we expect anyway more because the same quark is repeated several time, after each gluon radiation
+        std::cerr << "Number of generated (anti)quarks " << checkPdgQuarkTwo << " lower than expected\n";
+        return 1;
+    }
+
+    float fracForcedDecays = float(nSignalGoodDecay) / nSignals;
+    if (fracForcedDecays < 0.9) { // we put some tolerance (e.g. due to oscillations which might change the final state)
+        std::cerr << "Fraction of signals decaying into the correct channel " << fracForcedDecays << " lower than expected\n";
+        return 1;
+    }
+
+    return 0;
+}