PWGHF: Add possibility to pass pT-hard bins from script (#1674)

* PWGHF: Add possibility to pass pT-hard bins from script

* Add missing cast

* Add missing cast

* Fix typo

(cherry picked from commit 96c75a6)

Author: fgrosa

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

@@ -78,6 +78,20 @@ public:
             LOG(fatal) << "********** [GeneratorPythia8EmbedHF] bad configuration, fix it! **********";
             break;
         }
+
+        // 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;
+        }
+        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();
     }
 
@@ -393,4 +407,5 @@ FairGenerator * GeneratorPythia8EmbedHFCharmAndBeauty(float yQuarkMin = -1.5, fl
     myGen->setupGeneratorEvHF(hf_generators::GapTriggeredCharmAndBeauty, yQuarkMin, yQuarkMax, yHadronMin, yHadronMax, hadronPdgList);
 
     return myGen;
-}
+}
+

MC/config/PWGHF/external/generator/generator_pythia8_gaptriggered_hf.C

@@ -75,6 +75,14 @@ public:
     mHadRapidityMin = yMin;
     mHadRapidityMax = yMax;
   };
+  void setUsedSeed(unsigned int seed)
+  {
+    mUsedSeed = seed;
+  };
+  unsigned int getUsedSeed() const
+  {
+    return mUsedSeed;
+  };
 
 protected:
   //__________________________________________________________________
@@ -200,6 +208,7 @@ private:
   int mHadronPdg;
   float mHadRapidityMin;
   float mHadRapidityMax;
+  unsigned int mUsedSeed;
 
   // Control gap-triggering
   unsigned long long mGeneratedEvents;
@@ -218,6 +227,7 @@ FairGenerator *GeneratorPythia8GapTriggeredCharm(int inputTriggerRatio, float yQ
 {
   auto myGen = new GeneratorPythia8GapTriggeredHF(inputTriggerRatio, std::vector<int>{4}, hadronPdgList);
   auto seed = (gRandom->TRandom::GetSeed() % 900000000);
+  myGen->setUsedSeed(seed);
   myGen->readString("Random:setSeed on");
   myGen->readString("Random:seed " + std::to_string(seed));
   myGen->setQuarkRapidity(yQuarkMin, yQuarkMax);
@@ -233,6 +243,7 @@ FairGenerator *GeneratorPythia8GapTriggeredBeauty(int inputTriggerRatio, float y
 {
   auto myGen = new GeneratorPythia8GapTriggeredHF(inputTriggerRatio, std::vector<int>{5}, hadronPdgList);
   auto seed = (gRandom->TRandom::GetSeed() % 900000000);
+  myGen->setUsedSeed(seed);
   myGen->readString("Random:setSeed on");
   myGen->readString("Random:seed " + std::to_string(seed));
   myGen->setQuarkRapidity(yQuarkMin, yQuarkMax);
@@ -248,6 +259,7 @@ FairGenerator *GeneratorPythia8GapTriggeredCharmAndBeauty(int inputTriggerRatio,
 {
   auto myGen = new GeneratorPythia8GapTriggeredHF(inputTriggerRatio, std::vector<int>{4, 5}, hadronPdgList);
   auto seed = (gRandom->TRandom::GetSeed() % 900000000);
+  myGen->setUsedSeed(seed);
   myGen->readString("Random:setSeed on");
   myGen->readString("Random:seed " + std::to_string(seed));
   myGen->setQuarkRapidity(yQuarkMin, yQuarkMax);
@@ -266,6 +278,7 @@ FairGenerator *GeneratorPythia8GapHF(int inputTriggerRatio, float yQuarkMin = -1
   }
   auto myGen = new GeneratorPythia8GapTriggeredHF(inputTriggerRatio, quarkPdgList, hadronPdgList);
   auto seed = (gRandom->TRandom::GetSeed() % 900000000);
+  myGen->setUsedSeed(seed);
   myGen->readString("Random:setSeed on");
   myGen->readString("Random:seed " + std::to_string(seed));
   myGen->setQuarkRapidity(yQuarkMin, yQuarkMax);