1 // This class provides an interface between the HYDJET++ Monte-Carlo model
2 // and ROOT (by inheriting from the TGenerator class).
3 // Please look into the FASTMC articles for more documentation on the
9 #ifndef ROOT_TGenerator
10 #include "TGenerator.h"
13 #ifndef INITIALSTATEHYDJET_INCLUDED
14 #include "UHKM/InitialStateHydjet.h"
18 #include "UHKM/DatabasePDG.h"
26 class TUHKMgen : public TGenerator {
28 InitialStateHydjet *fInitialState; // HYDJET++ main class which handles the entire Monte-Carlo simulation
29 ParticleAllocator fAllocator; // object which allocates/deallocates memory for the lists of particles
30 List_t fSourceList; // list holding the initial particles generated by both soft and hard model components
31 List_t fSecondariesList; // list holding the initial particles and the final state particles generated in resonance decays
32 Int_t fNPprim; // number of primary particles
33 Int_t fNPsec; // secondary particles
34 InitialParamsHydjet_t fHydjetParams; // struct holding the list of parameters for the initial state
35 // details for the PDG database
36 Char_t fParticleFilename[256]; // particle list filename
37 Char_t fDecayFilename[256]; // decay table filename
38 Int_t fStableFlagPDG[500]; // array of PDG codes flagged to be stable
39 Bool_t fStableFlagStatus[500]; // array of decay flag status
40 Int_t fStableFlagged; // number of toggled decay flags
41 // Bool_t fUseCharmParticles; // flag to turn on/off the use of charm particles
42 // Double_t fMinWidth; // minimum decay width for the particles to be used from the PDG database
43 // Double_t fMaxWidth; // maximum ----
44 // Double_t fMinMass; // minimum mass for the particles to be used from the PDG database
45 // Double_t fMaxMass; // maximum ----
47 void SetAllParameters();
50 TUHKMgen(const TUHKMgen&);
51 TUHKMgen& operator=(const TUHKMgen&);
56 virtual void Initialize();
57 virtual void GenerateEvent();
58 virtual Int_t ImportParticles(TClonesArray *particles, const Option_t* option="prim");
59 virtual TObjArray* ImportParticles(const Option_t* option="prim");
60 // this function makes available the PDG info in our database
61 virtual DatabasePDG* PDGInfo() const {return fInitialState->PDGInfo();}
64 // set reasonable default parameters suited for central Au+Au collisions at RHIC(200GeV)
65 void SetAllParametersRHIC();
66 // set reasonable default parameters suited for central Pb+Pb collisions at LHC(5.5TeV)
67 void SetAllParametersLHC();
69 void SetEcms(Double_t value) {fHydjetParams.fSqrtS = value;} // CMS energy per nucleon [GeV] (<2.24 given temperature and ch pot are used)
70 void SetAw(Double_t value) {fHydjetParams.fAw = value;} // nuclei mass number
71 void SetIfb(Int_t value) {fHydjetParams.fIfb = value;} //b-simulation: 0-fix,1-distributed
72 void SetBfix(Double_t value) {fHydjetParams.fBfix = value;} // fix impact parameter
73 void SetBmin(Double_t value) {fHydjetParams.fBmin = value;} // Minimum impact parameter
74 void SetBmax(Double_t value) {fHydjetParams.fBmax = value;} // Maximum impact parameter
75 void SetChFrzTemperature(Double_t value) {fHydjetParams.fT = value;} // Temperature for the chemical freezeout [GeV]
76 void SetMuB(Double_t value) {fHydjetParams.fMuB = value;} // Baryonic chemical potential [GeV]
77 void SetMuS(Double_t value) {fHydjetParams.fMuS = value;} // Strangeness chemical potential [GeV]
78 void SetMuQ(Double_t value) {fHydjetParams.fMuI3 = value;} // Isospin chemical potential [GeV]
79 void SetThFrzTemperature(Double_t value) {fHydjetParams.fThFO = value;} // Temperature for the thermal freezeout [GeV]
80 void SetMuPionThermal(Double_t value) {fHydjetParams.fMu_th_pip = value;} // Chemical potential for pi+ at thermal freezeout [GeV]
83 void SetSeed(Int_t value) {fHydjetParams.fSeed = value;} //parameter to set the random nuber seed (=0 the current time is used
84 //to set the random generator seed, !=0 the value fSeed is
85 //used to set the random generator seed and then the state of random
86 //number generator in PYTHIA MRPY(1)=fSeed
90 void SetTauB(Double_t value) {fHydjetParams.fTau = value;} // Proper time for the freeze-out hypersurface [fm/c]
91 void SetSigmaTau(Double_t value) {fHydjetParams.fSigmaTau = value;} // Standard deviation for the proper time (emission duration) [fm/c]
92 void SetRmaxB(Double_t value) {fHydjetParams.fR = value;} // Maximal transverse radius [fm]
93 void SetYlMax(Double_t value) {fHydjetParams.fYlmax = value;} // Maximal fireball longitudinal rapidity
94 void SetEtaRMax(Double_t value) {fHydjetParams.fUmax = value;} // Maximal transverse velocity
95 void SetMomAsymmPar(Double_t value) {fHydjetParams.fDelta = value;} // Momentum asymmetry parameter
96 void SetCoordAsymmPar(Double_t value) {fHydjetParams.fEpsilon = value;} // Coordinate asymmetry parameter
99 void SetFlagWeakDecay(Double_t value) {fHydjetParams.fWeakDecay = value;} //flag to switch on/off weak hadron decays <0: decays off, >0: decays on, (default: 0)
102 void SetEtaType(Int_t value) {fHydjetParams.fEtaType = value;} // flag to choose rapidity distribution, if fEtaType<=0,
103 //then uniform rapidity distribution in [-fYlmax,fYlmax] if fEtaType>0,
104 //then Gaussian with dispertion = fYlmax
107 void SetGammaS(Double_t value) {fHydjetParams.fCorrS = value;} // Strangeness suppression parameter (if gamma_s<=0 then it will be calculated)
108 //not needed now void SetHdec(Double_t value) {fHydjetParams.fTime = value;} // Enable/disable hadronic decays (<0 no decays, >=0 decays)
111 void SetPyquenNhsel(Int_t value) {fHydjetParams.fNhsel = value;} // Flag to choose the type of event to be generated
113 void SetPyquenShad(Int_t value) {fHydjetParams.fIshad = value;} //flag to switch on/off impact parameter dependent nuclear
114 // shadowing for gluons and light sea quarks (u,d,s) (0: shadowing off,
115 // 1: shadowing on for fAw=207, 197, 110, 40, default: 1
117 void SetPyquenPtmin(Double_t value) {fHydjetParams.fPtmin = value;} // Pyquen input parameter for minimum Pt of parton-parton scattering (5GeV<pt<500GeV)
118 // fNhsel = 0 --> UHKM fireball, no jets
119 // fNhsel = 1 --> UHKM fireball, jets with no quenching
120 // fNhsel = 2 --> UHKM fireball, jets with quenching
121 // fNhsel = 3 --> no UHKM fireball, jets with no quenching
122 // fNhsel = 4 --> no UHKM fireball, jets with quenching
124 void SetPyquenT0(Double_t value) {fHydjetParams.fT0 = value;} //proper QGP formation tempereture
125 void SetPyquenTau0(Double_t value) {fHydjetParams.fTau0 = value;} //proper QGP formation time in fm/c (0.01<fTau0<10)
126 void SetPyquenNf(Int_t value) {fHydjetParams.fNf = value;} //number of active quark flavours N_f in QGP fNf=0, 1,2 or 3
127 void SetPyquenIenglu(Int_t value) {fHydjetParams.fIenglu = value;} // flag to fix type of in-medium partonic energy loss
128 //(0: radiative and collisional loss, 1: radiative loss only, 2:
129 //collisional loss only) (default: 0);
130 void SetPyquenIanglu(Int_t value) {fHydjetParams.fIanglu = value;} //flag to fix type of angular distribution of in-medium emitted
131 // gluons (0: small-angular, 1: wide-angular, 2:collinear) (default: 0).
134 void SetPDGParticleFile(const Char_t *name) {strcpy(fParticleFilename, name);} // Set the filename containing the particle PDG info
135 void SetPDGDecayFile(const Char_t *name) {strcpy(fDecayFilename, name);} // Set the filename containing the PDG decay channels info
136 void SetPDGParticleStable(Int_t pdg, Bool_t value) { // Turn on/off the decay flag for a PDG particle
137 fStableFlagPDG[fStableFlagged] = pdg;
138 fStableFlagStatus[fStableFlagged++] = value;
140 // void SetUseCharmParticles(Bool_t flag) {fUseCharmParticles = flag;}
141 // void SetMinimumWidth(Double_t value) {fMinWidth = value;}
142 // void SetMaximumWidth(Double_t value) {fMaxWidth = value;}
143 // void SetMinimumMass(Double_t value) {fMinMass = value;}
144 // void SetMaximumMass(Double_t value) {fMaxMass = value;}
148 Double_t GetEcms() const {return fHydjetParams.fSqrtS;}
149 Double_t GetAw() const {return fHydjetParams.fAw;}
150 Double_t GetIfb() const {return fHydjetParams.fIfb;}
151 Double_t GetBfix() const {return fHydjetParams.fBfix;}
152 Double_t GetBmin() const {return fHydjetParams.fBmin;}
153 Double_t GetBmax() const {return fHydjetParams.fBmax;}
154 Double_t GetChFrzTemperature() const {return fHydjetParams.fT;}
155 Double_t GetMuB() const {return fHydjetParams.fMuB;}
156 Double_t GetMuS() const {return fHydjetParams.fMuS;}
157 Double_t GetMuQ() const {return fHydjetParams.fMuI3;}
158 Double_t GetThFrzTemperature() const {return fHydjetParams.fThFO;}
159 Double_t GetMuPionThermal() const {return fHydjetParams.fMu_th_pip;}
160 Int_t GetSeed() const {return fHydjetParams.fSeed;}
161 Double_t GetTauB() const {return fHydjetParams.fTau;}
162 Double_t GetSigmaTau() const {return fHydjetParams.fSigmaTau;}
163 Double_t GetRmaxB() const {return fHydjetParams.fR;}
164 Double_t GetYlMax() const {return fHydjetParams.fYlmax;}
165 Double_t GetEtaRMax() const {return fHydjetParams.fUmax;}
166 Double_t GetMomAsymmPar() const {return fHydjetParams.fDelta;}
167 Double_t GetCoordAsymmPar() const {return fHydjetParams.fEpsilon;}
168 Double_t GetFlagWeakDecay() const {return fHydjetParams.fWeakDecay;}
169 Int_t GetEtaType() const {return fHydjetParams.fEtaType;}
170 Double_t GetGammaS() const {return fHydjetParams.fCorrS;}
171 Int_t GetPyquenNhsel() const {return fHydjetParams.fNhsel;}
172 Int_t GetPyquenShad() const {return fHydjetParams.fIshad;}
173 Double_t GetPyquenPtmin() const {return fHydjetParams.fPtmin;}
174 Double_t GetPyquenT0() const {return fHydjetParams.fT0;}
175 Double_t GetPyquenTau0() const {return fHydjetParams.fTau0;}
176 Double_t GetPyquenNf() const {return fHydjetParams.fNf;}
177 Double_t GetPyquenIenglu() const {return fHydjetParams.fIenglu;}
178 Double_t GetPyquenIanglu() const {return fHydjetParams.fIanglu;}
180 const Char_t* GetPDGParticleFile() const {return fParticleFilename;}
181 const Char_t* GetPDGDecayFile() const {return fDecayFilename;}
182 // Bool_t GetUseCharmParticles(){return fUseCharmParticles;}
183 // Double_t GetMinimumWidth() {return fMinWidth;}
184 // Double_t GetMaximumWidth() {return fMaxWidth;}
185 // Double_t GetMinimumMass() {return fMinMass;}
186 // Double_t GetMaximumMass() {return fMaxMass;}
188 void Print(const Option_t* opt="") const;
190 ClassDef(TUHKMgen, 3) //Interface to FASTMC Event Generator