3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
9 #include "AliGenerator.h"
10 #include "AliPythia.h"
11 #include "AliDecayer.h"
17 class AliGenPythia : public AliGenerator
21 AliGenPythia(Int_t npart);
22 AliGenPythia(const AliGenPythia &Pythia);
23 virtual ~AliGenPythia();
24 virtual void Generate();
26 // select process type
27 virtual void SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
28 // select structure function
29 virtual void SetStrucFunc(StrucFunc_t func = kGRV_HO) {fStrucFunc = func;}
30 // select pt of hard scattering
31 virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
32 {fPtHardMin = ptmin; fPtHardMax = ptmax; }
33 // set centre of mass energy
34 virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
36 virtual void SetForceDecay(Decay_t decay = kSemiMuonic) {fForceDecay = decay;}
37 // treat protons as inside nuclei
38 virtual void SetNuclei(Int_t a1, Int_t a2);
39 // get cross section of process
40 virtual Float_t GetXsection() {return fXsection;}
42 virtual Int_t CheckPDGCode(Int_t pdgcode);
43 // Assignment Operator
44 AliGenPythia & operator=(const AliGenPythia & rhs);
46 Process_t fProcess; // Process type
47 StrucFunc_t fStrucFunc; // Structure Function
48 Decay_t fForceDecay; // Decay channel are forced
49 Float_t fEnergyCMS; // Centre of mass energy
50 Float_t fKineBias; // Bias from kinematic selection
51 Int_t fTrials; // Number of trials
52 TArrayI fParentSelect; // Parent particles to be selected
53 TArrayI fChildSelect; // Decay products to be selected
54 Float_t fXsection; // Cross-section
55 AliPythia *fPythia; //! Pythia
56 Float_t fPtHardMin; // lower pT-hard cut
57 Float_t fPtHardMax; // higher pT-hard cut
58 Int_t fNucA1; // mass number nucleus side 1
59 Int_t fNucA2; // mass number nucleus side 2
60 Bool_t fFullEvent; // Write Full event if true
61 AliDecayer *fDecayer; // ! pointer to the decayer instance
63 // check if particle is selected as parent particle
64 Bool_t ParentSelected(Int_t ip);
65 // check if particle is selected as child particle
66 Bool_t ChildSelected(Int_t ip);
67 // all kinematic selection cuts go here
68 Bool_t KinematicSelection(TParticle *particle);
69 // adjust the weight from kinematic cuts
72 ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia