3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 // Generator using HIJING as an external generator
9 // The main HIJING options are accessable for the user through this interface.
10 // andreas.morsch@cern.ch
22 class AliGenHijing : public AliGenMC
24 enum {kNoTrigger, kHardProcesses, kDirectPhotons};
28 AliGenHijing(Int_t npart);
29 AliGenHijing(const AliGenHijing &Hijing);
30 virtual ~AliGenHijing();
31 virtual void Generate();
33 // set centre of mass energy
34 virtual void SetEnergyCMS(Float_t energy=5500) {fEnergyCMS=energy;}
35 virtual void SetReferenceFrame(TString frame="CMS")
37 virtual void SetProjectile(TString proj="A",
38 Int_t a=208, Int_t z=82)
42 virtual void SetTarget(TString tar="A",
43 Int_t a=208, Int_t z=82)
47 virtual void SetImpactParameterRange(Float_t bmin = 0, Float_t bmax = 15.)
48 { fMinImpactParam=bmin;
51 virtual void KeepFullEvent();
52 virtual void SetJetQuenching(Int_t flag=1) {fQuench = flag;}
53 virtual void SetShadowing(Int_t flag=1) {fShadowing = flag;}
54 virtual void SetDecaysOff(Int_t flag=1) {fDecaysOff = flag;}
55 virtual void SetTrigger(Int_t flag=kNoTrigger) {fTrigger = flag;}
56 virtual void SetFlavor(Int_t flag=0) {fFlavor = flag;}
57 virtual void SetEvaluate(Int_t flag=0) {fEvaluate = flag;}
58 virtual void SetSelectAll(Int_t flag=0) {fSelectAll = flag;}
59 virtual void SetRadiation(Int_t flag=3) {fRadiation = flag;}
60 virtual void SetSpectators(Int_t spects=1) {fSpectators = spects;}
61 virtual void SetPtMinJet(Float_t ptmin) {fPtMinJet = ptmin;}
62 virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
63 {fEtaMinJet = etamin; fEtaMaxJet = etamax;}
64 virtual void SetJetPhiRange(Float_t phimin = -180., Float_t phimax = 180.)
65 {fPhiMinJet = phimin; fPhiMaxJet = phimax;}
66 virtual void SetBoostLHC(Int_t flag=0) {fLHC = flag;}
69 AliGenHijing & operator=(const AliGenHijing & rhs);
71 virtual void EvaluateCrossSections();
72 virtual void Boost(TClonesArray* particles);
73 virtual TGraph* CrossSection() {return fDsigmaDb;}
74 virtual TGraph* BinaryCollisions() {return fDnDb;}
75 virtual Bool_t CheckTrigger();
78 Bool_t SelectFlavor(Int_t pid);
82 TString fFrame; // Reference frame
83 TString fProjectile; // Projectile
84 TString fTarget; // Target
85 Int_t fAProjectile; // Projectile A
86 Int_t fZProjectile; // Projectile Z
87 Int_t fATarget; // Target A
88 Int_t fZTarget; // Target Z
89 Float_t fMinImpactParam; // minimum impact parameter
90 Float_t fMaxImpactParam; // maximum impact parameter
91 Int_t fKeep; // Flag to keep full event information
92 Int_t fQuench; // Flag to switch on jet quenching
93 Int_t fShadowing; // Flag to switch on voclear effects on parton distribution function
94 Int_t fDecaysOff; // Flag to turn off decays of pi0, K_s, D, Lambda, sigma
95 Int_t fTrigger; // Trigger type
96 Int_t fEvaluate; // Evaluate total and partial cross-sections
97 Int_t fSelectAll; // Flag to write the full event
98 Int_t fFlavor; // Selected particle flavor 4: charm+beauty 5: beauty
99 Float_t fEnergyCMS; // Centre of mass energy
100 Float_t fKineBias; // Bias from kinematic selection
101 Int_t fTrials; // Number of trials
102 TArrayI fParentSelect; // Parent particles to be selected
103 TArrayI fChildSelect; // Decay products to be selected
104 Float_t fXsection; // Cross-section
105 THijing *fHijing; // Hijing
106 Float_t fPtHardMin; // lower pT-hard cut
107 Float_t fPtHardMax; // higher pT-hard cut
108 Int_t fSpectators; // put spectators on stack
109 TGraph* fDsigmaDb; // dSigma/db for the system
110 TGraph* fDnDb; // dNBinaryCollisions/db
111 Float_t fPtMinJet; // Minimum Pt of triggered Jet
112 Float_t fEtaMinJet; // Minimum eta of triggered Jet
113 Float_t fEtaMaxJet; // Maximum eta of triggered Jet
114 Float_t fPhiMinJet; // At least one of triggered Jets must be in this
115 Float_t fPhiMaxJet; // phi range
116 Int_t fRadiation; // Flag to switch on/off initial and final state radiation
118 // ZDC proposal (by Chiara) to store num. of SPECTATORS protons and neutrons
119 Int_t fSpecn; // Num. of spectator neutrons
120 Int_t fSpecp; // Num. of spectator protons
121 Int_t fLHC; // Assume LHC as lab frame
124 // adjust the weight from kinematic cuts
125 void AdjustWeights();
126 // check seleted daughters
127 Bool_t DaughtersSelection(TParticle* iparticle, TClonesArray* particles);
129 Bool_t Stable(TParticle* particle);
131 ClassDef(AliGenHijing,1) // AliGenerator interface to Hijing