Making AliDCSValue sortable (Vladimir)

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

diff --git a/PYTHIA6/AliPythia.cxx b/PYTHIA6/AliPythia.cxx
index ba02c52167e80bf0d483be8f08250bc6451f6df8..9173c056a66f04a4b56d8566ac17ec5194b70794 100644 (file)
--- a/PYTHIA6/AliPythia.cxx
+++ b/PYTHIA6/AliPythia.cxx
@@ -1,3 +1,4 @@
+
 /**************************************************************************
  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
  *                                                                        *
@@ -17,9 +18,10 @@
 
 #include "AliPythia.h"
 #include "AliPythiaRndm.h"
-#include "../FASTSIM/AliFastGlauber.h"
-#include "../FASTSIM/AliQuenchingWeights.h"
+#include "AliFastGlauber.h"
+#include "AliQuenchingWeights.h"
 #include "TVector3.h"
+#include "PyquenCommon.h"
 
 ClassImp(AliPythia)
 
@@ -57,6 +59,8 @@ AliPythia::AliPythia():
     fStrucFunc(kCTEQ5L),
     fXJet(0.),
     fYJet(0.),
+    fNGmax(30),
+    fZmax(0.97),
     fGlauber(0),
     fQuenchingWeights(0)
 {
@@ -70,11 +74,15 @@ AliPythia::AliPythia():
 }
 
 AliPythia::AliPythia(const AliPythia& pythia):
+    TPythia6(pythia), 
+    AliRndm(pythia),
     fProcess(kPyMb),
     fEcms(0.),
     fStrucFunc(kCTEQ5L),
     fXJet(0.),
     fYJet(0.),
+    fNGmax(30),
+    fZmax(0.97),
     fGlauber(0),
     fQuenchingWeights(0)
 {
@@ -234,6 +242,43 @@ void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfun
        SetMSUB(95,1);             // low pt production
 
        AtlasTuning();
+       break;
+    case kPyMbDefault:
+// Minimum Bias pp-Collisions
+//
+//   
+//      select Pythia min. bias model
+       SetMSEL(0);
+       SetMSUB(92,1);             // single diffraction AB-->XB
+       SetMSUB(93,1);             // single diffraction AB-->AX
+       SetMSUB(94,1);             // double diffraction
+       SetMSUB(95,1);             // low pt production
+
+       break;
+    case kPyLhwgMb:
+// Les Houches Working Group 05 Minimum Bias pp-Collisions: hep-ph/0604120
+//  -> Pythia 6.3 or above is needed
+//   
+       SetMSEL(0);
+       SetMSUB(92,1);             // single diffraction AB-->XB
+       SetMSUB(93,1);             // single diffraction AB-->AX
+       SetMSUB(94,1);             // double diffraction
+       SetMSUB(95,1);             // low pt production
+
+        SetMSTP(51,kCTEQ6ll);      // CTEQ6ll pdf
+       SetMSTP(52,2);
+       SetMSTP(68,1);
+       SetMSTP(70,2);
+       SetMSTP(81,1);             // Multiple Interactions ON
+       SetMSTP(82,4);             // Double Gaussian Model
+       SetMSTP(88,1);
+
+       SetPARP(82,2.3);           // [GeV]    PT_min at Ref. energy
+       SetPARP(83,0.5);           // Core density in proton matter distribution (def.value)
+       SetPARP(84,0.5);           // Core radius
+       SetPARP(85,0.9);           // Regulates gluon prod. mechanism
+       SetPARP(90,0.2);           // 2*epsilon (exponent in power law)
+
        break;
     case kPyMbNonDiffr:
 // Minimum Bias pp-Collisions
@@ -265,7 +310,7 @@ void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfun
        SetMSEL(1);
  // Pythia Tune A (CDF)
  //
-       SetPARP(67,4.);            // Regulates Initial State Radiation
+       SetPARP(67,2.5);           // Regulates Initial State Radiation (value from best fit to D0 dijet analysis)
        SetMSTP(82,4);             // Double Gaussian Model
        SetPARP(82,2.0);           // [GeV]    PT_min at Ref. energy
        SetPARP(84,0.4);           // Core radius
@@ -506,9 +551,8 @@ void AliPythia::ProcInit(Process_t process, Float_t energy, StrucFunc_t strucfun
 //
 //  Initialize PYTHIA
     SetMSTP(41,1);   // all resonance decays switched on
-
     Initialize("CMS","p","p",fEcms);
-
+    
 }
 
 Int_t AliPythia::CheckedLuComp(Int_t kf)
@@ -617,14 +661,13 @@ void AliPythia::Pyrobo(Int_t imi, Int_t ima, Double_t the, Double_t phi, Double_
 
 
 
-void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod)
+void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMethod, Float_t zmax, Int_t ngmax)
 {
 // Initializes 
 // (1) The quenching model using quenching weights according to C. Salgado and U. Wiedemann
 // (2) The nuclear geometry using the Glauber Model
 //     
-
-
+    
     fGlauber = new AliFastGlauber();
     fGlauber->Init(2);
     fGlauber->SetCentralityClass(cMin, cMax); 
@@ -633,6 +676,9 @@ void AliPythia::InitQuenching(Float_t cMin, Float_t cMax, Float_t k, Int_t iECMe
     fQuenchingWeights->InitMult();
     fQuenchingWeights->SetK(k);
     fQuenchingWeights->SetECMethod(AliQuenchingWeights::kECMethod(iECMethod));
+    fNGmax = ngmax;
+    fZmax  = zmax;
+    
 }
 
 
@@ -750,7 +796,7 @@ void  AliPythia::Quench()
            //
            // Avoid complete loss
            //
-           if (fZQuench[j] == 1.) fZQuench[j] = 0.95;
+           if (fZQuench[j] == 1.) fZQuench[j] = fZmax;
            //
            // Some debug printing
 
@@ -779,7 +825,7 @@ void  AliPythia::Quench()
        if (!quenched[isys]) continue;
        
        nGluon[isys]   = 1 + Int_t(fZQuench[isys] / (1. - fZQuench[isys]));
-       if (nGluon[isys] > 6) nGluon[isys] = 6;
+       if (nGluon[isys] > fNGmax) nGluon[isys] = fNGmax;
        zquench[isys] = 1. - TMath::Power(1. - fZQuench[isys], 1./Double_t(nGluon[isys]));
        wjtKick[isys]  = wjtKick[isys] / TMath::Sqrt(Double_t(nGluon[isys]));
 
@@ -1164,9 +1210,25 @@ void  AliPythia::Quench()
 void AliPythia::Pyquen(Double_t a, Int_t ibf, Double_t b)
 {
     // Igor Lokthine's quenching routine
+    // http://lokhtin.web.cern.ch/lokhtin/pyquen/pyquen.txt
+
     pyquen(a, ibf, b);
 }
 
+void AliPythia::SetPyquenParameters(Double_t t0, Double_t tau0, Int_t nf, Int_t iengl, Int_t iangl)
+{
+    // Set the parameters for the PYQUEN package.
+    // See comments in PyquenCommon.h
+    
+    
+    PYQPAR.t0    = t0;
+    PYQPAR.tau0  = tau0;
+    PYQPAR.nf    = nf;
+    PYQPAR.iengl = iengl;
+    PYQPAR.iangl = iangl;
+}
+
+
 void AliPythia::Pyevnw()
 {
     // New multiple interaction scenario
@@ -1193,6 +1255,8 @@ void AliPythia::ConfigHeavyFlavor()
     
     // No multiple interactions
     SetMSTP(81,0);
+    SetPARP(81, 0.);
+    SetPARP(82, 0.);    
     // Initial/final parton shower on (Pythia default)
     SetMSTP(61,1);
     SetMSTP(71,1);
@@ -1212,6 +1276,7 @@ void AliPythia::AtlasTuning()
         SetMSTP(51, kCTEQ5L);      // CTEQ5L pdf
        SetMSTP(81,1);             // Multiple Interactions ON
        SetMSTP(82,4);             // Double Gaussian Model
+       SetPARP(81,1.9);           // Min. pt for multiple interactions (default in 6.2-14) 
        SetPARP(82,1.8);           // [GeV]    PT_min at Ref. energy
        SetPARP(89,1000.);         // [GeV]   Ref. energy
        SetPARP(90,0.16);          // 2*epsilon (exponent in power law)