3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
9 // Generator using the TPythia interface (via AliPythia)
10 // to generate pp collisions.
11 // Using SetNuclei() also nuclear modifications to the structure functions
12 // can be taken into account. This makes, of course, only sense for the
13 // generation of the products of hard processes (heavy flavor, jets ...)
15 // andreas.morsch@cern.ch
19 #include "AliPythia.h"
24 class AliGenPythia : public AliGenMC
28 typedef enum {kFlavorSelection, kParentSelection} StackFillOpt_t;
29 typedef enum {kCountAll, kCountParents, kCountTrackables} CountMode_t;
32 AliGenPythia(Int_t npart);
33 AliGenPythia(const AliGenPythia &Pythia);
34 virtual ~AliGenPythia();
35 virtual void Generate();
37 // set a cut on the Z coord. of the primary vertex (cm)
39 virtual void SetEventListRange(Int_t eventFirst=-1, Int_t eventLast=-1);
40 // select process type
41 virtual void SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
42 // select structure function
43 virtual void SetStrucFunc(StrucFunc_t func = kGRVHO) {fStrucFunc = func;}
44 // select pt of hard scattering
45 virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
46 {fPtHardMin = ptmin; fPtHardMax = ptmax; }
47 // set centre of mass energy
48 virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
49 // treat protons as inside nuclei
50 virtual void SetNuclei(Int_t a1, Int_t a2);
51 virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
52 {fEtaMinJet = etamin; fEtaMaxJet = etamax;}
53 virtual void SetJetPhiRange(Float_t phimin = -180., Float_t phimax = 180.)
54 {fPhiMinJet = TMath::Pi()*phimin/180.; fPhiMaxJet = TMath::Pi()*phimax/180.;}
55 virtual void SetGammaEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
56 {fEtaMinGamma = etamin; fEtaMaxGamma = etamax;}
57 virtual void SetGammaPhiRange(Float_t phimin = -180., Float_t phimax = 180.)
58 {fPhiMinGamma = TMath::Pi()*phimin/180.; fPhiMaxGamma = TMath::Pi()*phimax/180.;}
59 // Set option for feed down from higher family
60 virtual void SetFeedDownHigherFamily(Bool_t opt) {
63 // Set option for selecting particles kept in stack according to flavor
64 // or to parent selection
65 virtual void SetStackFillOpt(StackFillOpt_t opt) {
68 // Set fragmentation option
69 virtual void SetFragmentation(const Bool_t opt) {
73 virtual void SetCountMode(const CountMode_t mode) {
77 // get cross section of process
78 virtual Float_t GetXsection() const {return fXsection;}
79 virtual void FinishRun();
80 Bool_t CheckTrigger(TParticle* jet1, TParticle* jet2) const;
82 // Assignment Operator
83 AliGenPythia & operator=(const AliGenPythia & rhs);
85 // adjust the weight from kinematic cuts
88 void MakeHeader() const;
90 TClonesArray* fParticles; //Particle List
92 Process_t fProcess; //Process type
93 StrucFunc_t fStrucFunc; //Structure Function
94 Float_t fEnergyCMS; //Centre of mass energy
95 Float_t fKineBias; //!Bias from kinematic selection
96 Int_t fTrials; //!Number of trials
97 Int_t fFlavorSelect; //Heavy Flavor Selection
98 Float_t fXsection; //Cross-section
99 AliPythia *fPythia; //!Pythia
100 Float_t fPtHardMin; //lower pT-hard cut
101 Float_t fPtHardMax; //higher pT-hard cut
102 Int_t fNucA1; //mass number nucleus side 1
103 Int_t fNucA2; //mass number nucleus side 2
104 Bool_t fFullEvent; //!Write Full event if true
105 AliDecayer *fDecayer; //!Pointer to the decayer instance
106 Int_t fDebugEventFirst; //!First event to debug
107 Int_t fDebugEventLast; //!Last event to debug
108 Float_t fEtaMinJet; //Minimum eta of triggered Jet
109 Float_t fEtaMaxJet; //Maximum eta of triggered Jet
110 Float_t fPhiMinJet; //Minimum phi of triggered Jet
111 Float_t fPhiMaxJet; //Maximum phi of triggered Jet
113 Float_t fEtaMinGamma; // Minimum eta of triggered gamma
114 Float_t fEtaMaxGamma; // Maximum eta of triggered gamma
115 Float_t fPhiMinGamma; // Minimum phi of triggered gamma
116 Float_t fPhiMaxGamma; // Maximum phi of triggered gamma
118 StackFillOpt_t fStackFillOpt; // Stack filling with all particles with
119 // that flavour or only with selected
120 // parents and their decays
121 Bool_t fFeedDownOpt; // Option to set feed down from higher
122 // quark families (e.g. b->c)
123 Bool_t fFragmentation; // Option to activate fragmentation by Pythia
126 CountMode_t fCountMode; // Options for counting when the event will be finished.
127 // fCountMode = kCountAll --> All particles that end up in the
129 // fCountMode = kCountParents --> Only selected parents are counted
130 // fCountMode = kCountTrackabless --> Only particles flagged for tracking
134 ClassDef(AliGenPythia,2) // AliGenerator interface to Pythia