1) decouple the rapidity cut used in AliGenPythia to select the events with c or...

[u/mrichter/AliRoot.git] / PYTHIA6 / AliGenPythia.cxx

diff --git a/PYTHIA6/AliGenPythia.cxx b/PYTHIA6/AliGenPythia.cxx
index f50efaaf2d7eb8e5d72edeeecedb3c5e314bc1a6..5ad46d20b2de6d422cfe75427f25e3d0c286d389 100644 (file)
--- a/PYTHIA6/AliGenPythia.cxx
+++ b/PYTHIA6/AliGenPythia.cxx
@@ -70,14 +70,17 @@ AliGenPythia::AliGenPythia():
     fFlavorSelect(0),
     fXsection(0.),
     fPythia(0),
+    fWeightPower(0.),
     fPtHardMin(0.),
     fPtHardMax(1.e4),
     fYHardMin(-1.e10),
     fYHardMax(1.e10),
     fGinit(1),
     fGfinal(1),
+    fCRoff(0),
     fHadronisation(1),
     fPatchOmegaDalitz(0), 
+    fDecayerExodus(0),
     fNpartons(0),
     fReadFromFile(0),
     fReadLHEF(0),
@@ -106,6 +109,9 @@ AliGenPythia::AliGenPythia():
     fEtaMaxGamma(20.),      
     fPhiMinGamma(0.),      
     fPhiMaxGamma(2. * TMath::Pi()),      
+    fUseYCutHQ(kFALSE),
+    fYMinHQ(-20.),
+    fYMaxHQ(20.),
     fPycellEtaMax(2.),     
     fPycellNEta(274),       
     fPycellNPhi(432),       
@@ -124,10 +130,14 @@ AliGenPythia::AliGenPythia():
     fNucPdf(0),
     fTriggerParticle(0),
     fTriggerEta(0.9),     
+    fTriggerY(999.),     
+    fTriggerEtaMin(0.9),     
     fTriggerMinPt(-1),  
     fTriggerMaxPt(1000),  
     fTriggerMultiplicity(0),
     fTriggerMultiplicityEta(0),
+    fTriggerMultiplicityEtaMin(0),
+    fTriggerMultiplicityEtaMax(0),
     fTriggerMultiplicityPtMin(0),
     fCountMode(kCountAll),      
     fHeader(0),  
@@ -186,14 +196,17 @@ AliGenPythia::AliGenPythia(Int_t npart)
      fFlavorSelect(0),
      fXsection(0.),
      fPythia(0),
+     fWeightPower(0.),
      fPtHardMin(0.),
      fPtHardMax(1.e4),
      fYHardMin(-1.e10),
      fYHardMax(1.e10),
      fGinit(kTRUE),
      fGfinal(kTRUE),
+     fCRoff(kFALSE),
      fHadronisation(kTRUE),
-     fPatchOmegaDalitz(0), 
+     fPatchOmegaDalitz(0),
+     fDecayerExodus(0), 
      fNpartons(0),
      fReadFromFile(kFALSE),
      fReadLHEF(0),
@@ -222,6 +235,9 @@ AliGenPythia::AliGenPythia(Int_t npart)
      fEtaMaxGamma(20.),      
      fPhiMinGamma(0.),      
      fPhiMaxGamma(2. * TMath::Pi()),      
+     fUseYCutHQ(kFALSE),
+     fYMinHQ(-20.),
+     fYMaxHQ(20.),
      fPycellEtaMax(2.),     
      fPycellNEta(274),       
      fPycellNPhi(432),       
@@ -240,10 +256,14 @@ AliGenPythia::AliGenPythia(Int_t npart)
      fNucPdf(0),
      fTriggerParticle(0),
      fTriggerEta(0.9), 
+     fTriggerY(999.), 
+     fTriggerEtaMin(0.9),     
      fTriggerMinPt(-1),  
      fTriggerMaxPt(1000),      
      fTriggerMultiplicity(0),
      fTriggerMultiplicityEta(0),
+     fTriggerMultiplicityEtaMin(0),
+     fTriggerMultiplicityEtaMax(0),
      fTriggerMultiplicityPtMin(0),
      fCountMode(kCountAll),      
      fHeader(0),  
@@ -379,8 +399,8 @@ void AliGenPythia::Init()
 //
     fParentWeight=1./Float_t(fNpart);
 //
-
-
+    if (fWeightPower != 0)
+      fPythia->SetWeightPower(fWeightPower);
     fPythia->SetCKIN(3,fPtHardMin);
     fPythia->SetCKIN(4,fPtHardMax);
     fPythia->SetCKIN(7,fYHardMin);
@@ -402,6 +422,8 @@ void AliGenPythia::Init()
     fPythia->SetMSTP(61,fGinit);
 //  final state radiation
     fPythia->SetMSTP(71,fGfinal);
+    //color reconnection strength
+    if(fCRoff==1)fPythia->SetMSTP(95,0);
 //  pt - kick
     if (fPtKick > 0.) {
        fPythia->SetMSTP(91,1);
@@ -700,8 +722,29 @@ void AliGenPythia::Generate()
              fPythia->DalitzDecays();
              fPythia->SetMDCY(fPythia->Pycomp(111) ,1, 1);
            } 
-           fPythia->Pyexec();
-       }
+         
+      else  if (fDecayerExodus) {
+
+        fPythia->SetMDCY(fPythia->Pycomp(22) ,1, 0);
+        fPythia->SetMDCY(fPythia->Pycomp(111) ,1, 0);
+        fPythia->SetMDCY(fPythia->Pycomp(221) ,1, 0);
+        fPythia->Pyexec();
+        fPythia->OmegaDalitz();
+        fPythia->SetMDCY(fPythia->Pycomp(111) ,1, 1);
+        fPythia->PizeroDalitz();
+        fPythia->PhiDalitz();
+        fPythia->SetMDCY(fPythia->Pycomp(221) ,1, 1);
+        fPythia->EtaDalitz();
+        fPythia->EtaprimeDalitz();
+        fPythia->SetMDCY(fPythia->Pycomp(22) ,1, 1);
+        fPythia->RhoDirect();
+        fPythia->OmegaDirect();
+        fPythia->PhiDirect();
+        fPythia->JPsiDirect();
+      }
+    
+      fPythia->Pyexec();
+  }
        fTrials++;
        fPythia->ImportParticles(&fParticles,"All");
        
@@ -742,14 +785,14 @@ void AliGenPythia::Generate()
            fProcess != kPyMbMSEL1     &&
            fProcess != kPyW && 
            fProcess != kPyZ &&
-      fProcess != kPyZgamma &&
+            fProcess != kPyZgamma &&
            fProcess != kPyCharmppMNRwmi && 
            fProcess != kPyBeautyppMNRwmi &&
            fProcess != kPyBeautyJets &&
-     fProcess != kPyWPWHG &&
-     fProcess != kPyJetsPWHG &&
-     fProcess != kPyCharmPWHG &&
-     fProcess != kPyBeautyPWHG) {
+            fProcess != kPyWPWHG &&
+            fProcess != kPyJetsPWHG &&
+            fProcess != kPyCharmPWHG &&
+            fProcess != kPyBeautyPWHG) {
            
            for (i = 0; i < np; i++) {
                TParticle* iparticle = (TParticle *) fParticles.At(i);
@@ -1026,6 +1069,10 @@ Int_t  AliGenPythia::GenerateMB()
        // eta cut
        if (fTriggerMultiplicityEta > 0 && TMath::Abs(iparticle->Eta()) > fTriggerMultiplicityEta)
          continue;
+       //multiplicity check for a given eta range
+       if ((fTriggerMultiplicityEtaMin != fTriggerMultiplicityEtaMax) && 
+           (iparticle->Eta() < fTriggerMultiplicityEtaMin || iparticle->Eta() > fTriggerMultiplicityEtaMax))
+         continue;
        // pt cut
        if (iparticle->Pt() < fTriggerMultiplicityPtMin) 
            continue;
@@ -1052,7 +1099,12 @@ Int_t  AliGenPythia::GenerateMB()
            kf = CheckPDGCode(iparticle->GetPdgCode());
            if (kf != fTriggerParticle) continue;
            if (iparticle->Pt() == 0.) continue;
-           if (TMath::Abs(iparticle->Eta()) > fTriggerEta) continue;
+           if (TMath::Abs(iparticle->Y()) > fTriggerY) continue;
+           if (fTriggerEtaMin == fTriggerEta) {
+             if (TMath::Abs(iparticle->Eta()) > fTriggerEta) continue;
+           } else {
+             if (iparticle->Eta() > fTriggerEta || iparticle->Eta() < fTriggerEtaMin) continue;
+           }
            if ( iparticle->Pt() > fTriggerMaxPt || iparticle->Pt() < fTriggerMinPt ) continue;
            triggered = kTRUE;
            break;
@@ -1074,15 +1126,16 @@ Int_t  AliGenPythia::GenerateMB()
       Bool_t  theChild=kFALSE;
       Bool_t  triggered=kFALSE;
       Float_t y;  
-      Int_t   pdg,mpdg,mpdgUpperFamily;
-      for(i=0; i<np; i++) {
+      Int_t   pdg, mpdg, mpdgUpperFamily;
+      for(i = 0; i < np; i++) {
        partCheck = (TParticle*)fParticles.At(i);
        pdg = partCheck->GetPdgCode();  
        if(TMath::Abs(pdg) == fFlavorSelect) { // quark  
          if(pdg>0) { theQ=kTRUE; } else { theQbar=kTRUE; }
          y = 0.5*TMath::Log((partCheck->Energy()+partCheck->Pz()+1.e-13)/
                             (partCheck->Energy()-partCheck->Pz()+1.e-13));
-         if(y>fYMin && y<fYMax) inYcut=kTRUE;
+         if(fUseYCutHQ && y>fYMinHQ && y<fYMaxHQ) inYcut=kTRUE;
+         if(!fUseYCutHQ && y>fYMin && y<fYMax) inYcut=kTRUE;
        }
        if(fTriggerParticle) {
          if(TMath::Abs(pdg)==fTriggerParticle) triggered=kTRUE;
@@ -1118,10 +1171,10 @@ Int_t  AliGenPythia::GenerateMB()
 
     //Introducing child cuts in case kPyW, kPyZ, kPyMb, and kPyMbNonDiff
     if ( (
-    fProcess == kPyWPWHG ||
-    fProcess == kPyW ||
+         fProcess == kPyWPWHG ||
+         fProcess == kPyW ||
          fProcess == kPyZ ||
-    fProcess == kPyZgamma ||
+         fProcess == kPyZgamma ||
          fProcess == kPyMbDefault ||
          fProcess == kPyMb ||
          fProcess == kPyMbAtlasTuneMC09 ||
@@ -1133,7 +1186,7 @@ Int_t  AliGenPythia::GenerateMB()
        return 0;
       }
     }
-  
+    
 
     for (i = 0; i < np; i++) {
        Int_t trackIt = 0;
@@ -1239,6 +1292,7 @@ void AliGenPythia::MakeHeader()
 // Builds the event header, to be called after each event
     if (fHeader) delete fHeader;
     fHeader = new AliGenPythiaEventHeader("Pythia");
+    fHeader->SetTitle(GetTitle());
 //
 // Event type  
     if(fProcDiff>0){
@@ -1335,8 +1389,9 @@ void AliGenPythia::MakeHeader()
                
 //
 // Store Event Weight
-    ((AliGenPythiaEventHeader*) fHeader)->SetEventWeight(fPythia->GetPARI(7));
-                               
+    ((AliGenPythiaEventHeader*) fHeader)->SetEventWeight(fPythia->GetPARI(7)*fPythia->GetPARI(10));
+    // PARI(7) is 1 or -1, for weighted generation with accept/reject, e.g. POWHEG
+    // PARI(10) is a weight associated with reweighted generation, using Pyevwt
 //
 //  Pass header
 //