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;
30 class AliGenPythia : public AliGenMC
34 typedef enum {kFlavorSelection, kParentSelection} StackFillOpt_t;
35 typedef enum {kCountAll, kCountParents, kCountTrackables} CountMode_t;
36 typedef enum {kCluster, kCell} JetRecMode_t;
39 AliGenPythia(Int_t npart);
40 virtual ~AliGenPythia();
41 virtual void Generate();
43 // Range of events to be printed
44 virtual void SetEventListRange(Int_t eventFirst=-1, Int_t eventLast=-1);
45 // Select process type
46 virtual void SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
48 // Select structure function
49 virtual void SetStrucFunc(StrucFunc_t func = kCTEQ5L) {fStrucFunc = func;}
50 // Select pt of hard scattering
51 virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
52 {fPtHardMin = ptmin; fPtHardMax = ptmax; }
53 // y of hard scattering
54 virtual void SetYHard(Float_t ymin = -1.e10, Float_t ymax = 1.e10)
55 {fYHardMin = ymin; fYHardMax = ymax; }
56 // Set initial and final state gluon radiation
57 virtual void SetGluonRadiation(Int_t iIn, Int_t iFin)
58 {fGinit = iIn; fGfinal = iFin;}
60 virtual void SetPtKick(Float_t kt = 1.)
62 // Use the Pythia 6.3 new multiple interations scenario
63 virtual void UseNewMultipleInteractionsScenario() {fNewMIS = kTRUE;}
64 // Switch off heavy flavors
65 virtual void SwitchHFOff() {fHFoff = kTRUE;}
66 // Set centre of mass energy
67 virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
68 // Treat protons as inside nuclei with mass numbers a1 and a2
69 virtual void SetNuclei(Int_t a1, Int_t a2, Int_t pdfset = 0);
73 // Energy range for jet trigger
74 virtual void SetJetEtRange(Float_t etmin = 0., Float_t etmax = 1.e4)
75 {fEtMinJet = etmin; fEtMaxJet = etmax;}
76 // Eta range for jet trigger
77 virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
78 {fEtaMinJet = etamin; fEtaMaxJet = etamax;}
79 // Phi range for jet trigger
80 virtual void SetJetPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
81 {fPhiMinJet = TMath::Pi()*phimin/180.; fPhiMaxJet = TMath::Pi()*phimax/180.;}
82 // Jet reconstruction mode; default is cone algorithm
83 virtual void SetJetReconstructionMode(Int_t mode = kCell) {fJetReconstruction = mode;}
84 // Eta range for gamma trigger
85 virtual void SetGammaEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
86 {fEtaMinGamma = etamin; fEtaMaxGamma = etamax;}
87 // Phi range for gamma trigger
88 virtual void SetGammaPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
89 {fPhiMinGamma = TMath::Pi()*phimin/180.; fPhiMaxGamma = TMath::Pi()*phimax/180.;}
90 // Select jets with fragmentation photon or pi0 going to PHOS or EMCAL
91 virtual void SetFragPhotonInCalo(Bool_t b) {fFragPhotonInCalo = b;}
92 virtual void SetPi0InCalo (Bool_t b) {fPi0InCalo = b;}
93 virtual void SetPhotonInCalo(Bool_t b) {fPhotonInCalo = b;}
94 virtual void SetCheckPHOS (Bool_t b) {fCheckPHOS = b;}
95 virtual void SetCheckEMCAL(Bool_t b) {fCheckEMCAL = b;}
96 virtual void SetFragPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fFragPhotonInCalo = b;}
97 virtual void SetFragPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fFragPhotonInCalo = b;}
98 virtual void SetPi0InEMCAL(Bool_t b) {fCheckEMCAL = b; fPi0InCalo = b;}
99 virtual void SetPi0InPHOS(Bool_t b) {fCheckPHOS = b; fPi0InCalo = b;}
100 virtual void SetPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fPhotonInCalo = b;}
101 virtual void SetPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fPhotonInCalo = b;}
103 // Trigger on a minimum multiplicity
104 virtual void SetTriggerChargedMultiplicity(Int_t multiplicity, Float_t etamax = 0) {fTriggerMultiplicity = multiplicity; fTriggerMultiplicityEta = etamax; }
106 virtual void SetPhotonInPHOSeta(Bool_t b) {fCheckPHOSeta = b; fPhotonInCalo = b;}
107 virtual void SetFragPhotonOrPi0MinPt(Float_t pt) {fFragPhotonOrPi0MinPt = pt;}
108 virtual void SetPhotonMinPt(Float_t pt) {fPhotonMinPt = pt;}
109 // Trigger and rotate event
110 void RotatePhi(Int_t iphcand, Bool_t& okdd);
111 // Trigger on a single particle
112 virtual void SetTriggerParticle(Int_t particle = 0, Float_t etamax = 0.9)
113 {fTriggerParticle = particle; fTriggerEta = etamax;}
115 // Heavy flavor options
117 // Set option for feed down from higher family
118 virtual void SetFeedDownHigherFamily(Bool_t opt) {
121 // Set option for selecting particles kept in stack according to flavor
122 // or to parent selection
123 virtual void SetStackFillOpt(StackFillOpt_t opt) {
126 // Set fragmentation option
127 virtual void SetFragmentation(Bool_t opt) {
128 fFragmentation = opt;
131 virtual void SetCountMode(CountMode_t mode) {
137 // Set quenching mode 0 = no, 1 = AM, 2 = IL, 3 = NA, 4 = ACS
138 virtual void SetQuench(Int_t flag = 0) {fQuench = flag;}
139 // Set transport coefficient.
140 void SetQhat(Float_t qhat) {fQhat = qhat;}
141 //Set initial medium length.
142 void SetLength(Float_t length) {fLength = length;}
144 virtual void SetHadronisation(Int_t flag = 1) {fHadronisation = flag;}
145 virtual void SetReadFromFile(const Text_t *filname) {fFileName = filname; fReadFromFile = 1;}
150 // Get interaction rate for pileup studies
151 virtual void SetInteractionRate(Float_t rate,Float_t timewindow = 90.e-6);
152 virtual Float_t GetInteractionRate() const {return fInteractionRate;}
153 // get cross section of process
154 virtual Float_t GetXsection() const {return fXsection;}
155 // get triggered jets
156 void GetJets(Int_t& njets, Int_t& ntrig, Float_t jets[4][10]);
157 void RecJetsUA1(Int_t& njets, Float_t jets[4][50]);
158 void SetPycellParameters(Float_t etamax = 2., Int_t neta = 274, Int_t nphi = 432,
159 Float_t thresh = 0., Float_t etseed = 4.,
160 Float_t minet = 10., Float_t r = 1.);
162 void LoadEvent(AliStack* stack, Int_t flag = 0, Int_t reHadr = 0);
163 void LoadEvent(TObjArray* stack, Int_t flag = 0, Int_t reHadr = 0);
165 virtual Process_t GetProcess() const {return fProcess;}
166 virtual StrucFunc_t GetStrucFunc() const {return fStrucFunc;}
167 virtual void GetPtHard(Float_t& ptmin, Float_t& ptmax) const
168 {ptmin = fPtHardMin; ptmax = fPtHardMax;}
169 virtual void GetNuclei(Int_t& a1, Int_t& a2) const
170 {a1 = fAProjectile; a2 = fATarget;}
171 virtual void GetJetEtRange(Float_t& etamin, Float_t& etamax) const
172 {etamin = fEtaMinJet; etamax = fEtaMaxJet;}
173 virtual void GetJetPhiRange(Float_t& phimin, Float_t& phimax) const
174 {phimin = fPhiMinJet*180./TMath::Pi(); phimax = fPhiMaxJet*180/TMath::Pi();}
175 virtual void GetGammaEtaRange(Float_t& etamin, Float_t& etamax) const
176 {etamin = fEtaMinGamma; etamax = fEtaMaxGamma;}
177 virtual void GetGammaPhiRange(Float_t& phimin, Float_t& phimax) const
178 {phimin = fPhiMinGamma*180./TMath::Pi(); phimax = fPhiMaxGamma*180./TMath::Pi();}
180 Bool_t IsInEMCAL(Float_t phi, Float_t eta);
181 Bool_t IsInPHOS(Float_t phi, Float_t eta);
183 virtual void FinishRun();
184 Bool_t CheckTrigger(TParticle* jet1, TParticle* jet2);
185 //Used in some processes to selected child properties
186 Bool_t CheckKinematicsOnChild();
187 void GetSubEventTime();
190 // adjust the weight from kinematic cuts
191 void AdjustWeights() const;
194 void GeneratePileup();
195 Process_t fProcess; //Process type
196 StrucFunc_t fStrucFunc; //Structure Function
197 Float_t fKineBias; //!Bias from kinematic selection
198 Int_t fTrials; //!Number of trials for current event
199 Int_t fTrialsRun; //!Number of trials for run
201 Float_t fX1; //Mean x1
202 Float_t fX2; //Mean x2
203 Float_t fEventTime; //Time of the subevent
204 Float_t fInteractionRate; //Interaction rate (set by user)
205 Float_t fTimeWindow; //Time window for pileup events (set by user)
206 Int_t fCurSubEvent; //Index of the current sub-event
207 TArrayF *fEventsTime; //Subevents time for pileup
208 Int_t fNev; //Number of events
209 Int_t fFlavorSelect; //Heavy Flavor Selection
210 Float_t fXsection; //Cross-section
211 AliPythia *fPythia; //!Pythia
212 Float_t fPtHardMin; //lower pT-hard cut
213 Float_t fPtHardMax; //higher pT-hard cut
214 Float_t fYHardMin; //lower y-hard cut
215 Float_t fYHardMax; //higher y-hard cut
216 Int_t fGinit; //initial state gluon radiation
217 Int_t fGfinal; //final state gluon radiation
218 Int_t fHadronisation; //hadronisation
219 Int_t fNpartons; //Number of partons before hadronisation
220 Int_t fReadFromFile; //read partons from file
221 Int_t fQuench; //Flag for quenching
222 Float_t fQhat; //Transport coefficient (GeV^2/fm)
223 Float_t fLength; //Medium length (fm)
224 Float_t fPtKick; //Transverse momentum kick
225 Bool_t fFullEvent; //!Write Full event if true
226 AliDecayer *fDecayer; //!Pointer to the decayer instance
227 Int_t fDebugEventFirst; //!First event to debug
228 Int_t fDebugEventLast; //!Last event to debug
229 Float_t fEtMinJet; //Minimum et of triggered Jet
230 Float_t fEtMaxJet; //Maximum et of triggered Jet
231 Float_t fEtaMinJet; //Minimum eta of triggered Jet
232 Float_t fEtaMaxJet; //Maximum eta of triggered Jet
233 Float_t fPhiMinJet; //Minimum phi of triggered Jet
234 Float_t fPhiMaxJet; //Maximum phi of triggered Jet
235 Int_t fJetReconstruction; //Jet Reconstruction mode
236 Float_t fEtaMinGamma; // Minimum eta of triggered gamma
237 Float_t fEtaMaxGamma; // Maximum eta of triggered gamma
238 Float_t fPhiMinGamma; // Minimum phi of triggered gamma
239 Float_t fPhiMaxGamma; // Maximum phi of triggered gamma
240 Float_t fPycellEtaMax; // Max. eta for Pycell
241 Int_t fPycellNEta; // Number of eta bins for Pycell
242 Int_t fPycellNPhi; // Number of phi bins for Pycell
243 Float_t fPycellThreshold; // Pycell threshold
244 Float_t fPycellEtSeed; // Pycell seed
245 Float_t fPycellMinEtJet; // Pycell min. jet et
246 Float_t fPycellMaxRadius; // Pycell cone radius
247 StackFillOpt_t fStackFillOpt; // Stack filling with all particles with
248 // that flavour or only with selected
249 // parents and their decays
250 Bool_t fFeedDownOpt; // Option to set feed down from higher
251 // quark families (e.g. b->c)
252 Bool_t fFragmentation; // Option to activate fragmentation by Pythia
253 Bool_t fSetNuclei; // Flag indicating that SetNuclei has been called
254 Bool_t fNewMIS; // Flag for the new multipple interactions scenario
255 Bool_t fHFoff; // Flag for switching heafy flavor production off
256 Int_t fNucPdf; // Nuclear pdf 0: EKS98 1: EPS08
257 Int_t fTriggerParticle; // Trigger on this particle ...
258 Float_t fTriggerEta; // .. within |eta| < fTriggerEta
259 Int_t fTriggerMultiplicity; // Trigger on events with a minimum charged multiplicity
260 Float_t fTriggerMultiplicityEta; // in a given eta range
261 CountMode_t fCountMode; // Options for counting when the event will be finished.
262 // fCountMode = kCountAll --> All particles that end up in the
264 // fCountMode = kCountParents --> Only selected parents are counted
265 // fCountMode = kCountTrackabless --> Only particles flagged for tracking
270 AliGenPythiaEventHeader* fHeader; //! Event header
271 AliRunLoader* fRL; //! Run Loader
272 const Text_t* fFileName; //! Name of file to read from
275 Bool_t fFragPhotonInCalo; // Option to ask for Fragmentation Photon in calorimeters acceptance
276 Bool_t fPi0InCalo; // Option to ask for Pi0 in calorimeters acceptance
277 Bool_t fPhotonInCalo; // Option to ask for Decay Photon in calorimeter acceptance
278 Bool_t fCheckEMCAL; // Option to ask for FragPhoton or Pi0 in calorimeters EMCAL acceptance
279 Bool_t fCheckPHOS; // Option to ask for FragPhoton or Pi0 in calorimeters PHOS acceptance
280 Bool_t fCheckPHOSeta; // Option to ask for PHOS eta acceptance
281 Float_t fFragPhotonOrPi0MinPt; // Minimum momentum of Fragmentation Photon or Pi0
282 Float_t fPhotonMinPt; // Minimum momentum of Photon
283 //Calorimeters eta-phi acceptance
284 Float_t fPHOSMinPhi; // Minimum phi PHOS
285 Float_t fPHOSMaxPhi; // Maximum phi PHOS
286 Float_t fPHOSEta; // Minimum eta PHOS
287 Float_t fEMCALMinPhi; // Minimum phi EMCAL
288 Float_t fEMCALMaxPhi; // Maximum phi EMCAL
289 Float_t fEMCALEta; // Maximum eta EMCAL
292 AliGenPythia(const AliGenPythia &Pythia);
293 AliGenPythia & operator=(const AliGenPythia & rhs);
295 ClassDef(AliGenPythia,8) // AliGenerator interface to Pythia