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1 | #ifndef ALIGENHIJING_H | |
2 | #define ALIGENHIJING_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
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 | |
11 | ||
12 | #include "AliGenMC.h" | |
13 | #include <TString.h> | |
14 | ||
15 | class THijing; | |
16 | class TParticle; | |
17 | class TClonesArray; | |
18 | class TGraph; | |
19 | ||
20 | class AliGenHijing : public AliGenMC | |
21 | { | |
22 | enum {kNoTrigger, kHardProcesses, kDirectPhotons}; | |
23 | ||
24 | public: | |
25 | AliGenHijing(); | |
26 | AliGenHijing(Int_t npart); | |
27 | AliGenHijing(const AliGenHijing &Hijing); | |
28 | virtual ~AliGenHijing(); | |
29 | virtual void Generate(); | |
30 | virtual void Init(); | |
31 | // set centre of mass energy | |
32 | virtual void SetEnergyCMS(Float_t energy=5500) {fEnergyCMS=energy;} | |
33 | virtual void SetReferenceFrame(TString frame="CMS") | |
34 | {fFrame=frame;} | |
35 | ||
36 | virtual void SetImpactParameterRange(Float_t bmin = 0, Float_t bmax = 15.) | |
37 | {fMinImpactParam=bmin; fMaxImpactParam=bmax;} | |
38 | virtual void KeepFullEvent(); | |
39 | virtual void SetJetQuenching(Int_t flag=1) {fQuench = flag;} | |
40 | virtual void SetShadowing(Int_t flag=1) {fShadowing = flag;} | |
41 | virtual void SetDecaysOff(Int_t flag=1) {fDecaysOff = flag;} | |
42 | virtual void SetTrigger(Int_t flag=kNoTrigger) {fTrigger = flag;} | |
43 | virtual void SetFlavor(Int_t flag=0) {fFlavor = flag;} | |
44 | virtual void SetEvaluate(Int_t flag=0) {fEvaluate = flag;} | |
45 | virtual void SetSelectAll(Int_t flag=0) {fSelectAll = flag;} | |
46 | virtual void SetRadiation(Int_t flag=3) {fRadiation = flag;} | |
47 | virtual void SetSpectators(Int_t spects=1) {fSpectators = spects;} | |
48 | virtual void SetPtJet(Float_t ptmin) {fPtMinJet = ptmin;} | |
49 | virtual void SetSimpleJets(Int_t flag=0) {fSimpleJet = flag;} | |
50 | virtual void SetNoGammas(Int_t flag=0) {fNoGammas = flag;} | |
51 | ||
52 | virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.) | |
53 | {fEtaMinJet = etamin; fEtaMaxJet = etamax;} | |
54 | virtual void SetJetPhiRange(Float_t phimin = -180., Float_t phimax = 180.) | |
55 | {fPhiMinJet = TMath::Pi()*phimin/180.; fPhiMaxJet = TMath::Pi()*phimax/180.;} | |
56 | virtual void SetBoostLHC(Int_t flag = 0) {fLHC = flag;} | |
57 | // Getters | |
58 | virtual Float_t GetEnergyCMS() const {return fEnergyCMS;} | |
59 | virtual TString GetReferenceFrame() const {return fFrame;} | |
60 | virtual void GetProjectile(TString& tar, Int_t& a, Int_t& z) const | |
61 | {tar = fProjectile; a = fAProjectile; z = fZProjectile;} | |
62 | virtual void GetTarget(TString& tar, Int_t& a, Int_t& z) const | |
63 | {tar = fTarget; a = fATarget; z = fZTarget;} | |
64 | virtual void GetImpactParameterRange(Float_t& bmin, Float_t& bmax) const | |
65 | {bmin = fMinImpactParam; bmax = fMaxImpactParam;} | |
66 | virtual Int_t GetJetQuenching() const {return fQuench;} | |
67 | virtual Int_t GetShadowing() const {return fShadowing;} | |
68 | virtual Int_t GetTrigger() const {return fTrigger;} | |
69 | virtual Int_t GetFlavor() const {return fFlavor;} | |
70 | virtual Int_t GetRadiation() const {return fRadiation;} | |
71 | virtual Int_t GetSpectators() const {return fSpectators;} | |
72 | virtual Float_t GetPtJet() const {return fPtMinJet;} | |
73 | virtual void GetJetEtaRange(Float_t& etamin, Float_t& etamax) const | |
74 | {etamin = fEtaMinJet; etamax = fEtaMaxJet;} | |
75 | virtual void GetJetPhiRange(Float_t& phimin, Float_t& phimax) const | |
76 | {phimin = fPhiMinJet*180./TMath::Pi(); phimax = fPhiMaxJet*180./TMath::Pi();} | |
77 | ||
78 | ||
79 | // Physics Routines | |
80 | virtual Bool_t ProvidesCollisionGeometry() const {return kTRUE;} | |
81 | virtual void EvaluateCrossSections(); | |
82 | virtual TGraph* CrossSection() {return fDsigmaDb;} | |
83 | virtual TGraph* BinaryCollisions() {return fDnDb;} | |
84 | virtual Bool_t CheckTrigger(); | |
85 | // | |
86 | AliGenHijing & operator=(const AliGenHijing & rhs); | |
87 | protected: | |
88 | Bool_t SelectFlavor(Int_t pid); | |
89 | void MakeHeader(); | |
90 | protected: | |
91 | TString fFrame; // Reference frame | |
92 | Float_t fMinImpactParam; // minimum impact parameter | |
93 | Float_t fMaxImpactParam; // maximum impact parameter | |
94 | Int_t fKeep; // Flag to keep full event information | |
95 | Int_t fQuench; // Flag to switch on jet quenching | |
96 | Int_t fShadowing; // Flag to switch on nuclear effects on parton distribution function | |
97 | Int_t fDecaysOff; // Flag to turn off decays of pi0, K_s, D, Lambda, sigma | |
98 | Int_t fTrigger; // Trigger type | |
99 | Int_t fEvaluate; // Evaluate total and partial cross-sections | |
100 | Int_t fSelectAll; // Flag to write the full event | |
101 | Int_t fFlavor; // Selected particle flavor 4: charm+beauty 5: beauty | |
102 | Float_t fEnergyCMS; // Centre of mass energy | |
103 | Float_t fKineBias; // Bias from kinematic selection | |
104 | Int_t fTrials; // Number of trials | |
105 | Float_t fXsection; // Cross-section | |
106 | THijing *fHijing; //!Hijing | |
107 | Float_t fPtHardMin; // lower pT-hard cut | |
108 | Float_t fPtHardMax; // higher pT-hard cut | |
109 | Int_t fSpectators; // put spectators on stack | |
110 | TGraph* fDsigmaDb; // dSigma/db for the system | |
111 | TGraph* fDnDb; // dNBinaryCollisions/db | |
112 | Float_t fPtMinJet; // Minimum Pt of triggered Jet | |
113 | Float_t fEtaMinJet; // Minimum eta of triggered Jet | |
114 | Float_t fEtaMaxJet; // Maximum eta of triggered Jet | |
115 | Float_t fPhiMinJet; // At least one of triggered Jets must be in this | |
116 | Float_t fPhiMaxJet; // phi range | |
117 | Int_t fRadiation; // Flag to switch on/off initial and final state radiation | |
118 | Int_t fSimpleJet; // Flag to produce simple tiggered jet topology | |
119 | Int_t fNoGammas; // Don't write gammas if flag "on" | |
120 | ||
121 | // ZDC proposal (by Chiara) to store num. of SPECTATORS protons and neutrons | |
122 | Int_t fSpecn; // Num. of spectator neutrons | |
123 | Int_t fSpecp; // Num. of spectator protons | |
124 | Int_t fLHC; // Assume LHC as lab frame | |
125 | private: | |
126 | void Copy(TObject &rhs) const; | |
127 | // adjust the weight from kinematic cuts | |
128 | void AdjustWeights(); | |
129 | // check seleted daughters | |
130 | Bool_t DaughtersSelection(TParticle* iparticle); | |
131 | // check if stable | |
132 | Bool_t Stable(TParticle* particle) const; | |
133 | ||
134 | ClassDef(AliGenHijing, 5) // AliGenerator interface to Hijing | |
135 | }; | |
136 | #endif | |
137 | ||
138 | ||
139 | ||
140 | ||
141 |