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 "GenTypeDefs.h"
16 class AliGenPythia : public AliGenerator
20 AliGenPythia(Int_t npart);
21 AliGenPythia(const AliGenPythia &Pythia);
22 virtual ~AliGenPythia();
23 virtual void Generate();
25 // select process type
26 virtual void SetProcess(Process_t proc=charm) {fProcess=proc;}
27 // select structure function
28 virtual void SetStrucFunc(StrucFunc_t func=GRV_HO) {fStrucFunc=func;}
29 // select pt of hard scattering
30 virtual void SetPtHard(Float_t ptmin=0, Float_t ptmax=1.e10)
31 {fPtHardMin=ptmin; fPtHardMax=ptmax; }
32 // set centre of mass energy
33 virtual void SetEnergyCMS(Float_t energy=5500) {fEnergyCMS=energy;}
35 virtual void SetForceDecay(Decay_t decay=semimuonic) {fForceDecay=decay;}
36 // get cross section of process
37 virtual Float_t GetXsection() {return fXsection;}
39 virtual Int_t CheckPDGCode(Int_t pdgcode);
40 // Assignment Operator
41 AliGenPythia & operator=(const AliGenPythia & rhs);
43 Process_t fProcess; // Process type
44 StrucFunc_t fStrucFunc; // Structure Function
45 Decay_t fForceDecay; // Decay channel are forced
46 Float_t fEnergyCMS; // Centre of mass energy
47 Float_t fKineBias; // Bias from kinematic selection
48 Int_t fTrials; // Number of trials
49 TArrayI fParentSelect; // Parent particles to be selected
50 TArrayI fChildSelect; // Decay products to be selected
51 Float_t fXsection; // Cross-section
52 AliPythia *fPythia; // Pythia
53 Float_t fPtHardMin; // lower pT-hard cut
54 Float_t fPtHardMax; // higher pT-hard cut
57 // check if particle is selected as parent particle
58 Bool_t ParentSelected(Int_t ip);
59 // check if particle is selected as child particle
60 Bool_t ChildSelected(Int_t ip);
61 // all kinematic selection cuts go here
62 Bool_t KinematicSelection(TParticle *particle);
63 // adjust the weight from kinematic cuts
66 ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia