3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
10 // Generator using the TPythia interface (via AliPythia)
11 // to generate pp collisions.
12 // Using SetNuclei() also nuclear modifications to the structure functions
13 // can be taken into account. This makes, of course, only sense for the
14 // generation of the products of hard processes (heavy flavor, jets ...)
16 // andreas.morsch@cern.ch
20 #include "AliPythia.h"
24 class AliGenPythiaEventHeader;
25 class AliGenEventHeader;
29 class AliGenPythia : public AliGenMC
33 typedef enum {kFlavorSelection, kParentSelection} StackFillOpt_t;
34 typedef enum {kCountAll, kCountParents, kCountTrackables} CountMode_t;
35 typedef enum {kCluster, kCell} JetRecMode_t;
38 AliGenPythia(Int_t npart);
39 virtual ~AliGenPythia();
40 virtual void Generate();
42 // Range of events to be printed
43 virtual void SetEventListRange(Int_t eventFirst=-1, Int_t eventLast=-1);
44 // Select process type
45 virtual void SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
46 // Select structure function
47 virtual void SetStrucFunc(StrucFunc_t func = kCTEQ5L) {fStrucFunc = func;}
48 // Select pt of hard scattering
49 virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
50 {fPtHardMin = ptmin; fPtHardMax = ptmax; }
51 // y of hard scattering
52 virtual void SetYHard(Float_t ymin = -1.e10, Float_t ymax = 1.e10)
53 {fYHardMin = ymin; fYHardMax = ymax; }
54 // Set initial and final state gluon radiation
55 virtual void SetGluonRadiation(Int_t iIn, Int_t iFin)
56 {fGinit = iIn; fGfinal = iFin;}
58 virtual void SetPtKick(Float_t kt = 1.)
60 // Use the Pythia 6.3 new multiple interations scenario
61 virtual void UseNewMultipleInteractionsScenario() {fNewMIS = kTRUE;}
62 // Switch off heavy flavors
63 virtual void SwitchHFOff() {fHFoff = kTRUE;}
64 // Set centre of mass energy
65 virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
66 // Treat protons as inside nuclei with mass numbers a1 and a2
67 virtual void SetNuclei(Int_t a1, Int_t a2);
71 // Energy range for jet trigger
72 virtual void SetJetEtRange(Float_t etmin = 0., Float_t etmax = 1.e4)
73 {fEtMinJet = etmin; fEtMaxJet = etmax;}
74 // Eta range for jet trigger
75 virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
76 {fEtaMinJet = etamin; fEtaMaxJet = etamax;}
77 // Phi range for jet trigger
78 virtual void SetJetPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
79 {fPhiMinJet = TMath::Pi()*phimin/180.; fPhiMaxJet = TMath::Pi()*phimax/180.;}
80 // Jet reconstruction mode; default is cone algorithm
81 virtual void SetJetReconstructionMode(Int_t mode = kCell) {fJetReconstruction = mode;}
82 // Eta range for gamma trigger
83 virtual void SetGammaEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
84 {fEtaMinGamma = etamin; fEtaMaxGamma = etamax;}
85 // Phi range for gamma trigger
86 virtual void SetGammaPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
87 {fPhiMinGamma = TMath::Pi()*phimin/180.; fPhiMaxGamma = TMath::Pi()*phimax/180.;}
88 // Select jets with fragmentation photon or pi0 going to PHOS or EMCAL
89 virtual void SetFragPhotonInCalo(Bool_t b) {fFragPhotonInCalo = b;}
90 virtual void SetPi0InCalo (Bool_t b) {fPi0InCalo = b;}
91 virtual void SetPhotonInCalo(Bool_t b) {fPhotonInCalo = b;}
92 virtual void SetCheckPHOS (Bool_t b) {fCheckPHOS = b;}
93 virtual void SetCheckEMCAL(Bool_t b) {fCheckEMCAL = b;}
94 virtual void SetFragPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fFragPhotonInCalo = b;}
95 virtual void SetFragPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fFragPhotonInCalo = b;}
96 virtual void SetPi0InEMCAL(Bool_t b) {fCheckEMCAL = b; fPi0InCalo = b;}
97 virtual void SetPi0InPHOS(Bool_t b) {fCheckPHOS = b; fPi0InCalo = b;}
98 virtual void SetPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fPhotonInCalo = b;}
99 virtual void SetPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fPhotonInCalo = b;}
101 // Trigger on a minimum multiplicity
102 virtual void SetTriggerChargedMultiplicity(Int_t multiplicity, Float_t etamax = 0) {fTriggerMultiplicity = multiplicity; fTriggerMultiplicityEta = etamax; }
104 virtual void SetPhotonInPHOSeta(Bool_t b) {fCheckPHOSeta = b; fPhotonInCalo = b;}
105 virtual void SetFragPhotonOrPi0MinPt(Float_t pt) {fFragPhotonOrPi0MinPt = pt;}
106 virtual void SetPhotonMinPt(Float_t pt) {fPhotonMinPt = pt;}
107 // Trigger and rotate event
108 void RotatePhi(Int_t iphcand, Bool_t& okdd);
109 // Trigger on a single particle
110 virtual void SetTriggerParticle(Int_t particle = 0, Float_t etamax = 0.9)
111 {fTriggerParticle = particle; fTriggerEta = etamax;}
113 // Heavy flavor options
115 // Set option for feed down from higher family
116 virtual void SetFeedDownHigherFamily(Bool_t opt) {
119 // Set option for selecting particles kept in stack according to flavor
120 // or to parent selection
121 virtual void SetStackFillOpt(StackFillOpt_t opt) {
124 // Set fragmentation option
125 virtual void SetFragmentation(Bool_t opt) {
126 fFragmentation = opt;
129 virtual void SetCountMode(CountMode_t mode) {
135 // Set quenching mode 0 = no, 1 = AM, 2 = IL
136 virtual void SetQuench(Int_t flag = 0) {fQuench = flag;}
137 virtual void SetHadronisation(Int_t flag = 1) {fHadronisation = flag;}
138 virtual void SetReadFromFile(const Text_t *filname) {fFileName = filname; fReadFromFile = 1;}
143 // Get interaction rate for pileup studies
144 virtual void SetInteractionRate(Float_t rate,Float_t timewindow = 90.e-6);
145 virtual Float_t GetInteractionRate() const {return fInteractionRate;}
146 // get cross section of process
147 virtual Float_t GetXsection() const {return fXsection;}
148 // get triggered jets
149 void GetJets(Int_t& njets, Int_t& ntrig, Float_t jets[4][10]);
150 void RecJetsUA1(Int_t& njets, Float_t jets[4][50]);
151 void SetPycellParameters(Float_t etamax = 2., Int_t neta = 274, Int_t nphi = 432,
152 Float_t thresh = 0., Float_t etseed = 4.,
153 Float_t minet = 10., Float_t r = 1.);
155 void LoadEvent(AliStack* stack, Int_t flag = 0, Int_t reHadr = 0);
157 virtual Process_t GetProcess() const {return fProcess;}
158 virtual StrucFunc_t GetStrucFunc() const {return fStrucFunc;}
159 virtual void GetPtHard(Float_t& ptmin, Float_t& ptmax) const
160 {ptmin = fPtHardMin; ptmax = fPtHardMax;}
161 virtual void GetNuclei(Int_t& a1, Int_t& a2) const
162 {a1 = fAProjectile; a2 = fATarget;}
163 virtual void GetJetEtRange(Float_t& etamin, Float_t& etamax) const
164 {etamin = fEtaMinJet; etamax = fEtaMaxJet;}
165 virtual void GetJetPhiRange(Float_t& phimin, Float_t& phimax) const
166 {phimin = fPhiMinJet*180./TMath::Pi(); phimax = fPhiMaxJet*180/TMath::Pi();}
167 virtual void GetGammaEtaRange(Float_t& etamin, Float_t& etamax) const
168 {etamin = fEtaMinGamma; etamax = fEtaMaxGamma;}
169 virtual void GetGammaPhiRange(Float_t& phimin, Float_t& phimax) const
170 {phimin = fPhiMinGamma*180./TMath::Pi(); phimax = fPhiMaxGamma*180./TMath::Pi();}
172 Bool_t IsInEMCAL(Float_t phi, Float_t eta);
173 Bool_t IsInPHOS(Float_t phi, Float_t eta);
175 virtual void FinishRun();
176 Bool_t CheckTrigger(TParticle* jet1, TParticle* jet2);
177 //Used in some processes to selected child properties
178 Bool_t CheckKinematicsOnChild();
179 void GetSubEventTime();
182 // adjust the weight from kinematic cuts
183 void AdjustWeights() const;
186 void GeneratePileup();
187 Process_t fProcess; //Process type
188 StrucFunc_t fStrucFunc; //Structure Function
189 Float_t fKineBias; //!Bias from kinematic selection
190 Int_t fTrials; //!Number of trials for current event
191 Int_t fTrialsRun; //!Number of trials for run
193 Float_t fX1; //Mean x1
194 Float_t fX2; //Mean x2
195 Float_t fEventTime; //Time of the subevent
196 Float_t fInteractionRate; //Interaction rate (set by user)
197 Float_t fTimeWindow; //Time window for pileup events (set by user)
198 Int_t fCurSubEvent; //Index of the current sub-event
199 TArrayF *fEventsTime; //Subevents time for pileup
200 Int_t fNev; //Number of events
201 Int_t fFlavorSelect; //Heavy Flavor Selection
202 Float_t fXsection; //Cross-section
203 AliPythia *fPythia; //!Pythia
204 Float_t fPtHardMin; //lower pT-hard cut
205 Float_t fPtHardMax; //higher pT-hard cut
206 Float_t fYHardMin; //lower y-hard cut
207 Float_t fYHardMax; //higher y-hard cut
208 Int_t fGinit; //initial state gluon radiation
209 Int_t fGfinal; //final state gluon radiation
210 Int_t fHadronisation; //hadronisation
211 Int_t fNpartons; //Number of partons before hadronisation
212 Int_t fReadFromFile; //read partons from file
213 Int_t fQuench; //Flag for quenching
214 Float_t fPtKick; //Transverse momentum kick
215 Bool_t fFullEvent; //!Write Full event if true
216 AliDecayer *fDecayer; //!Pointer to the decayer instance
217 Int_t fDebugEventFirst; //!First event to debug
218 Int_t fDebugEventLast; //!Last event to debug
219 Float_t fEtMinJet; //Minimum et of triggered Jet
220 Float_t fEtMaxJet; //Maximum et of triggered Jet
221 Float_t fEtaMinJet; //Minimum eta of triggered Jet
222 Float_t fEtaMaxJet; //Maximum eta of triggered Jet
223 Float_t fPhiMinJet; //Minimum phi of triggered Jet
224 Float_t fPhiMaxJet; //Maximum phi of triggered Jet
225 Int_t fJetReconstruction; //Jet Reconstruction mode
226 Float_t fEtaMinGamma; // Minimum eta of triggered gamma
227 Float_t fEtaMaxGamma; // Maximum eta of triggered gamma
228 Float_t fPhiMinGamma; // Minimum phi of triggered gamma
229 Float_t fPhiMaxGamma; // Maximum phi of triggered gamma
230 Float_t fPycellEtaMax; // Max. eta for Pycell
231 Int_t fPycellNEta; // Number of eta bins for Pycell
232 Int_t fPycellNPhi; // Number of phi bins for Pycell
233 Float_t fPycellThreshold; // Pycell threshold
234 Float_t fPycellEtSeed; // Pycell seed
235 Float_t fPycellMinEtJet; // Pycell min. jet et
236 Float_t fPycellMaxRadius; // Pycell cone radius
237 StackFillOpt_t fStackFillOpt; // Stack filling with all particles with
238 // that flavour or only with selected
239 // parents and their decays
240 Bool_t fFeedDownOpt; // Option to set feed down from higher
241 // quark families (e.g. b->c)
242 Bool_t fFragmentation; // Option to activate fragmentation by Pythia
243 Bool_t fSetNuclei; // Flag indicating that SetNuclei has been called
244 Bool_t fNewMIS; // Flag for the new multipple interactions scenario
245 Bool_t fHFoff; // Flag for switching heafy flavor production off
246 Int_t fTriggerParticle; // Trigger on this particle ...
247 Float_t fTriggerEta; // .. within |eta| < fTriggerEta
248 Int_t fTriggerMultiplicity; // Trigger on events with a minimum charged multiplicity
249 Float_t fTriggerMultiplicityEta; // in a given eta range
250 CountMode_t fCountMode; // Options for counting when the event will be finished.
251 // fCountMode = kCountAll --> All particles that end up in the
253 // fCountMode = kCountParents --> Only selected parents are counted
254 // fCountMode = kCountTrackabless --> Only particles flagged for tracking
259 AliGenPythiaEventHeader* fHeader; //! Event header
260 AliRunLoader* fRL; //! Run Loader
261 const Text_t* fFileName; //! Name of file to read from
264 Bool_t fFragPhotonInCalo; // Option to ask for Fragmentation Photon in calorimeters acceptance
265 Bool_t fPi0InCalo; // Option to ask for Pi0 in calorimeters acceptance
266 Bool_t fPhotonInCalo; // Option to ask for Decay Photon in calorimeter acceptance
267 Bool_t fCheckEMCAL; // Option to ask for FragPhoton or Pi0 in calorimeters EMCAL acceptance
268 Bool_t fCheckPHOS; // Option to ask for FragPhoton or Pi0 in calorimeters PHOS acceptance
269 Bool_t fCheckPHOSeta; // Option to ask for PHOS eta acceptance
270 Float_t fFragPhotonOrPi0MinPt; // Minimum momentum of Fragmentation Photon or Pi0
271 Float_t fPhotonMinPt; // Minimum momentum of Photon
272 //Calorimeters eta-phi acceptance
273 Float_t fPHOSMinPhi; // Minimum phi PHOS
274 Float_t fPHOSMaxPhi; // Maximum phi PHOS
275 Float_t fPHOSEta; // Minimum eta PHOS
276 Float_t fEMCALMinPhi; // Minimum phi EMCAL
277 Float_t fEMCALMaxPhi; // Maximum phi EMCAL
278 Float_t fEMCALEta; // Maximum eta EMCAL
281 AliGenPythia(const AliGenPythia &Pythia);
282 AliGenPythia & operator=(const AliGenPythia & rhs);
284 ClassDef(AliGenPythia,8) // AliGenerator interface to Pythia