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, kHeavyFlavor} 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;}
47 virtual void SetTune(Int_t itune) {fItune = itune;}
49 // Select structure function
50 virtual void SetStrucFunc(StrucFunc_t func = kCTEQ5L) {fStrucFunc = func;}
51 // Select pt of hard scattering
52 virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
53 {fPtHardMin = ptmin; fPtHardMax = ptmax; }
54 // y of hard scattering
55 virtual void SetYHard(Float_t ymin = -1.e10, Float_t ymax = 1.e10)
56 {fYHardMin = ymin; fYHardMax = ymax; }
57 // Set initial and final state gluon radiation
58 virtual void SetGluonRadiation(Int_t iIn, Int_t iFin)
59 {fGinit = iIn; fGfinal = iFin;}
61 virtual void SetPtKick(Float_t kt = 1.)
63 // Use the Pythia 6.3 new multiple interations scenario
64 virtual void UseNewMultipleInteractionsScenario() {fNewMIS = kTRUE;}
65 // Switch off heavy flavors
66 virtual void SwitchHFOff() {fHFoff = kTRUE;}
67 // Set centre of mass energy
68 virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
69 // Treat protons as inside nuclei with mass numbers a1 and a2
70 virtual void SetNuclei(Int_t a1, Int_t a2, Int_t pdfset = 0);
74 // Energy range for jet trigger
75 virtual void SetJetEtRange(Float_t etmin = 0., Float_t etmax = 1.e4)
76 {fEtMinJet = etmin; fEtMaxJet = etmax;}
77 // Eta range for jet trigger
78 virtual void SetJetEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
79 {fEtaMinJet = etamin; fEtaMaxJet = etamax;}
80 // Phi range for jet trigger
81 virtual void SetJetPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
82 {fPhiMinJet = TMath::Pi()*phimin/180.; fPhiMaxJet = TMath::Pi()*phimax/180.;}
83 // Jet reconstruction mode; default is cone algorithm
84 virtual void SetJetReconstructionMode(Int_t mode = kCell) {fJetReconstruction = mode;}
85 // Eta range for gamma trigger
86 virtual void SetGammaEtaRange(Float_t etamin = -20., Float_t etamax = 20.)
87 {fEtaMinGamma = etamin; fEtaMaxGamma = etamax;}
88 // Phi range for gamma trigger
89 virtual void SetGammaPhiRange(Float_t phimin = 0., Float_t phimax = 360.)
90 {fPhiMinGamma = TMath::Pi()*phimin/180.; fPhiMaxGamma = TMath::Pi()*phimax/180.;}
91 // Select jets with fragmentation photon or pi0 going to PHOS or EMCAL
92 virtual void SetFragPhotonInCalo(Bool_t b) {fFragPhotonInCalo = b;}
93 virtual void SetPi0InCalo (Bool_t b) {fPi0InCalo = b;}
94 virtual void SetPhotonInCalo(Bool_t b) {fPhotonInCalo = b;}
95 virtual void SetCheckPHOS (Bool_t b) {fCheckPHOS = b;}
96 virtual void SetCheckEMCAL(Bool_t b) {fCheckEMCAL = b;}
97 virtual void SetFragPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fFragPhotonInCalo = b;}
98 virtual void SetFragPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fFragPhotonInCalo = b;}
99 virtual void SetPi0InEMCAL(Bool_t b) {fCheckEMCAL = b; fPi0InCalo = b;}
100 virtual void SetPi0InPHOS(Bool_t b) {fCheckPHOS = b; fPi0InCalo = b;}
101 virtual void SetPhotonInEMCAL(Bool_t b) {fCheckEMCAL = b; fPhotonInCalo = b;}
102 virtual void SetElectronInEMCAL(Bool_t b) {fEleInEMCAL = b;}
103 virtual void SetPhotonInPHOS(Bool_t b) {fCheckPHOS = b; fPhotonInCalo = b;}
105 // Trigger on a minimum multiplicity
106 virtual void SetTriggerChargedMultiplicity(Int_t multiplicity, Float_t etamax = 0, Float_t ptmin = -1.)
107 {fTriggerMultiplicity = multiplicity; fTriggerMultiplicityEta = etamax;
108 fTriggerMultiplicityPtMin = ptmin;}
110 virtual void SetPhotonInPHOSeta(Bool_t b) {fCheckPHOSeta = b; fPhotonInCalo = b;}
111 virtual void SetFragPhotonOrPi0MinPt(Float_t pt) {fFragPhotonOrPi0MinPt = pt;}
112 virtual void SetPhotonMinPt(Float_t pt) {fPhotonMinPt = pt;}
113 virtual void SetElectronMinPt(Float_t pt) {fElectronMinPt = pt;}
114 // Trigger and rotate event
115 void RotatePhi(Int_t iphcand, Bool_t& okdd);
116 // Trigger on a single particle
117 virtual void SetTriggerParticle(Int_t particle = 0, Float_t etamax = 0.9)
118 {fTriggerParticle = particle; fTriggerEta = etamax;}
120 // Heavy flavor options
122 // Set option for feed down from higher family
123 virtual void SetFeedDownHigherFamily(Bool_t opt) {
126 // Set option for selecting particles kept in stack according to flavor
127 // or to parent selection
128 virtual void SetStackFillOpt(StackFillOpt_t opt) {
131 // Set fragmentation option
132 virtual void SetFragmentation(Bool_t opt) {
133 fFragmentation = opt;
136 virtual void SetCountMode(CountMode_t mode) {
142 // Set quenching mode 0 = no, 1 = AM, 2 = IL, 3 = NA, 4 = ACS
143 virtual void SetQuench(Int_t flag = 0) {fQuench = flag;}
144 // Set transport coefficient.
145 void SetQhat(Float_t qhat) {fQhat = qhat;}
146 //Set initial medium length.
147 void SetLength(Float_t length) {fLength = length;}
148 //set parameters for pyquen afterburner
149 virtual void SetPyquenPar(Float_t t0=1., Float_t tau0=0.1, Int_t nf=0,Int_t iengl=0, Int_t iangl=3)
150 {fpyquenT = t0; fpyquenTau = tau0; fpyquenNf=nf;fpyquenEloss=iengl;fpyquenAngle=iangl;}
151 virtual void SetHadronisation(Int_t flag = 1) {fHadronisation = flag;}
152 virtual void SetPatchOmegaDalitz(Int_t flag = 1) {fPatchOmegaDalitz = flag;}
153 virtual void SetReadFromFile(const Text_t *filname) {fkFileName = filname; fReadFromFile = 1;}
158 // Get interaction rate for pileup studies
159 virtual void SetInteractionRate(Float_t rate,Float_t timewindow = 90.e-6);
160 virtual Float_t GetInteractionRate() const {return fInteractionRate;}
161 // get cross section of process
162 virtual Float_t GetXsection() const {return fXsection;}
163 // get triggered jets
164 void GetJets(Int_t& njets, Int_t& ntrig, Float_t jets[4][10]);
165 void RecJetsUA1(Int_t& njets, Float_t jets[4][50]);
166 void SetPycellParameters(Float_t etamax = 2., Int_t neta = 274, Int_t nphi = 432,
167 Float_t thresh = 0., Float_t etseed = 4.,
168 Float_t minet = 10., Float_t r = 1.);
170 void LoadEvent(AliStack* stack, Int_t flag = 0, Int_t reHadr = 0);
171 void LoadEvent(const TObjArray* stack, Int_t flag = 0, Int_t reHadr = 0);
173 virtual Process_t GetProcess() const {return fProcess;}
174 virtual StrucFunc_t GetStrucFunc() const {return fStrucFunc;}
175 virtual void GetPtHard(Float_t& ptmin, Float_t& ptmax) const
176 {ptmin = fPtHardMin; ptmax = fPtHardMax;}
177 virtual void GetNuclei(Int_t& a1, Int_t& a2) const
178 {a1 = fAProjectile; a2 = fATarget;}
179 virtual void GetJetEtRange(Float_t& etamin, Float_t& etamax) const
180 {etamin = fEtaMinJet; etamax = fEtaMaxJet;}
181 virtual void GetJetPhiRange(Float_t& phimin, Float_t& phimax) const
182 {phimin = fPhiMinJet*180./TMath::Pi(); phimax = fPhiMaxJet*180/TMath::Pi();}
183 virtual void GetGammaEtaRange(Float_t& etamin, Float_t& etamax) const
184 {etamin = fEtaMinGamma; etamax = fEtaMaxGamma;}
185 virtual void GetGammaPhiRange(Float_t& phimin, Float_t& phimax) const
186 {phimin = fPhiMinGamma*180./TMath::Pi(); phimax = fPhiMaxGamma*180./TMath::Pi();}
188 Bool_t IsInEMCAL(Float_t phi, Float_t eta) const;
189 Bool_t IsInPHOS(Float_t phi, Float_t eta) const;
190 Bool_t IsFromHeavyFlavor(Int_t ipart);
192 virtual void FinishRun();
193 Bool_t CheckTrigger(const TParticle* jet1, const TParticle* jet2);
194 //Used in some processes to selected child properties
195 Bool_t CheckKinematicsOnChild();
196 void GetSubEventTime();
198 void SetTuneForDiff(Bool_t a=kTRUE) {fkTuneForDiff=a;}
199 AliDecayer * GetDecayer(){return fDecayer;}
202 // adjust the weight from kinematic cuts
203 void AdjustWeights() const;
206 void GeneratePileup();
207 Process_t fProcess; //Process type
208 Int_t fItune; // Pythia tune > 6.4
209 StrucFunc_t fStrucFunc; //Structure Function
210 Float_t fKineBias; //!Bias from kinematic selection
211 Int_t fTrials; //!Number of trials for current event
212 Int_t fTrialsRun; //!Number of trials for run
214 Float_t fX1; //Mean x1
215 Float_t fX2; //Mean x2
216 Float_t fEventTime; //Time of the subevent
217 Float_t fInteractionRate; //Interaction rate (set by user)
218 Float_t fTimeWindow; //Time window for pileup events (set by user)
219 Int_t fCurSubEvent; //Index of the current sub-event
220 TArrayF *fEventsTime; //Subevents time for pileup
221 Int_t fNev; //Number of events
222 Int_t fFlavorSelect; //Heavy Flavor Selection
223 Float_t fXsection; //Cross-section
224 AliPythia *fPythia; //!Pythia
225 Float_t fPtHardMin; //lower pT-hard cut
226 Float_t fPtHardMax; //higher pT-hard cut
227 Float_t fYHardMin; //lower y-hard cut
228 Float_t fYHardMax; //higher y-hard cut
229 Int_t fGinit; //initial state gluon radiation
230 Int_t fGfinal; //final state gluon radiation
231 Int_t fHadronisation; //hadronisation
232 Bool_t fPatchOmegaDalitz; //flag for omega dalitz decay patch
233 Int_t fNpartons; //Number of partons before hadronisation
234 Int_t fReadFromFile; //read partons from file
235 Int_t fQuench; //Flag for quenching
236 Float_t fQhat; //Transport coefficient (GeV^2/fm)
237 Float_t fLength; //Medium length (fm)
238 Float_t fpyquenT; //Pyquen initial temperature
239 Float_t fpyquenTau; //Pyquen initial proper time
240 Int_t fpyquenNf; //Pyquen number of flavours into the game
241 Int_t fpyquenEloss; //Pyquen type of energy loss
242 Int_t fpyquenAngle; //Pyquen radiation angle for gluons
243 Float_t fImpact; //Impact parameter for quenching simulation (q-pythia)
244 Float_t fPtKick; //Transverse momentum kick
245 Bool_t fFullEvent; //!Write Full event if true
246 AliDecayer *fDecayer; //!Pointer to the decayer instance
247 Int_t fDebugEventFirst; //!First event to debug
248 Int_t fDebugEventLast; //!Last event to debug
249 Float_t fEtMinJet; //Minimum et of triggered Jet
250 Float_t fEtMaxJet; //Maximum et of triggered Jet
251 Float_t fEtaMinJet; //Minimum eta of triggered Jet
252 Float_t fEtaMaxJet; //Maximum eta of triggered Jet
253 Float_t fPhiMinJet; //Minimum phi of triggered Jet
254 Float_t fPhiMaxJet; //Maximum phi of triggered Jet
255 Int_t fJetReconstruction; //Jet Reconstruction mode
256 Float_t fEtaMinGamma; // Minimum eta of triggered gamma
257 Float_t fEtaMaxGamma; // Maximum eta of triggered gamma
258 Float_t fPhiMinGamma; // Minimum phi of triggered gamma
259 Float_t fPhiMaxGamma; // Maximum phi of triggered gamma
260 Float_t fPycellEtaMax; // Max. eta for Pycell
261 Int_t fPycellNEta; // Number of eta bins for Pycell
262 Int_t fPycellNPhi; // Number of phi bins for Pycell
263 Float_t fPycellThreshold; // Pycell threshold
264 Float_t fPycellEtSeed; // Pycell seed
265 Float_t fPycellMinEtJet; // Pycell min. jet et
266 Float_t fPycellMaxRadius; // Pycell cone radius
267 StackFillOpt_t fStackFillOpt; // Stack filling with all particles with
268 // that flavour or only with selected
269 // parents and their decays
270 Bool_t fFeedDownOpt; // Option to set feed down from higher
271 // quark families (e.g. b->c)
272 Bool_t fFragmentation; // Option to activate fragmentation by Pythia
273 Bool_t fSetNuclei; // Flag indicating that SetNuclei has been called
274 Bool_t fNewMIS; // Flag for the new multipple interactions scenario
275 Bool_t fHFoff; // Flag for switching heafy flavor production off
276 Int_t fNucPdf; // Nuclear pdf 0: EKS98 1: EPS08
277 Int_t fTriggerParticle; // Trigger on this particle ...
278 Float_t fTriggerEta; // .. within |eta| < fTriggerEta
279 Int_t fTriggerMultiplicity; // Trigger on events with a minimum charged multiplicity
280 Float_t fTriggerMultiplicityEta; // in a given eta range
281 Float_t fTriggerMultiplicityPtMin; // above this pT
282 CountMode_t fCountMode; // Options for counting when the event will be finished.
283 // fCountMode = kCountAll --> All particles that end up in the
285 // fCountMode = kCountParents --> Only selected parents are counted
286 // fCountMode = kCountTrackabless --> Only particles flagged for tracking
291 AliGenPythiaEventHeader* fHeader; //! Event header
292 AliRunLoader* fRL; //! Run Loader
293 const Text_t* fkFileName; //! Name of file to read from
296 Bool_t fFragPhotonInCalo; // Option to ask for Fragmentation Photon in calorimeters acceptance
297 Bool_t fPi0InCalo; // Option to ask for Pi0 in calorimeters acceptance
298 Bool_t fPhotonInCalo; // Option to ask for Decay Photon in calorimeter acceptance
299 Bool_t fEleInEMCAL; // Option to ask for Electron in EMCAL acceptance
300 Bool_t fCheckEMCAL; // Option to ask for FragPhoton or Pi0 in calorimeters EMCAL acceptance
301 Bool_t fCheckPHOS; // Option to ask for FragPhoton or Pi0 in calorimeters PHOS acceptance
302 Bool_t fCheckPHOSeta; // Option to ask for PHOS eta acceptance
303 Float_t fFragPhotonOrPi0MinPt; // Minimum momentum of Fragmentation Photon or Pi0
304 Float_t fPhotonMinPt; // Minimum momentum of Photon
305 Float_t fElectronMinPt; // Minimum momentum of Electron
306 //Calorimeters eta-phi acceptance
307 Float_t fPHOSMinPhi; // Minimum phi PHOS
308 Float_t fPHOSMaxPhi; // Maximum phi PHOS
309 Float_t fPHOSEta; // Minimum eta PHOS
310 Float_t fEMCALMinPhi; // Minimum phi EMCAL
311 Float_t fEMCALMaxPhi; // Maximum phi EMCAL
312 Float_t fEMCALEta; // Maximum eta EMCAL
314 Bool_t fkTuneForDiff; // Pythia tune
317 AliGenPythia(const AliGenPythia &Pythia);
318 AliGenPythia & operator=(const AliGenPythia & rhs);
321 Bool_t CheckDiffraction();
322 Bool_t GetWeightsDiffraction(Double_t M, Double_t &Mmin, Double_t &Mmax,
323 Double_t &wSD, Double_t &wDD, Double_t &wND);
325 ClassDef(AliGenPythia, 12) // AliGenerator interface to Pythia