3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 #include "AliGenerator.h"
9 #include "AliDecayer.h"
10 #include "GenTypeDefs.h"
18 //-------------------------------------------------------------
19 class AliGenParam : public AliGenerator
23 AliGenParam(Int_t npart, AliGenLib * Library, Param_t param, char* tname=0);
24 AliGenParam(Int_t npart, Param_t param, char* tname=0);
25 AliGenParam(Int_t npart, Param_t param,
26 Double_t (*PtPara)(Double_t*, Double_t*),
27 Double_t (*YPara )(Double_t*, Double_t*),
29 AliGenParam(const AliGenParam &Param);
31 virtual ~AliGenParam();
32 virtual void Generate();
34 // select particle type
35 virtual void SetParam(Param_t param=jpsi_p) {fParam=param;}
37 virtual void SetForceDecay(Decay_t decay=dimuon) {fForceDecay=decay;}
38 virtual void SetWeighting(Weighting_t flag=analog) {fAnalog=flag;}
39 virtual void SetCutOnChild(Int_t flag=0) {fCutOnChild=flag;}
40 virtual void SetChildMomentumRange(Float_t pmin=0, Float_t pmax=1.e10)
41 {fChildPMin = pmin; fChildPMax = pmax;}
42 virtual void SetChildPtRange(Float_t ptmin=0, Float_t ptmax=20.)
43 {fChildPtMin = ptmin; fChildPtMax = ptmax;}
44 virtual void SetChildPhiRange(Float_t phimin=-180., Float_t phimax=180)
45 {fChildPhiMin = TMath::Pi()*phimin/180;
46 fChildPhiMax = TMath::Pi()*phimax/180;}
47 virtual void SetChildThetaRange(Float_t thetamin=0, Float_t thetamax=180)
48 {fChildThetaMin = TMath::Pi()*thetamin/180;
49 fChildThetaMax = TMath::Pi()*thetamax/180;}
50 virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt=delta;}
52 AliGenParam & operator=(const AliGenParam & rhs);
54 Double_t (*fPtParaFunc)(Double_t*, Double_t*); //! Pointer to Pt parametrisation function
55 Double_t (*fYParaFunc )(Double_t*, Double_t*); //! Pointer to Y parametrisation function
56 Int_t (*fIpParaFunc )(); //! Pointer to particle type parametrisation function
57 TF1* fPtPara; // Transverse momentum parameterisation
58 TF1* fYPara; // Rapidity parameterisation
59 Param_t fParam; // Parameterisation type
60 Float_t fdNdy0; // central multiplicity per event
61 Float_t fYWgt; // Y-weight
62 Float_t fPtWgt; // Pt-weight
63 Weighting_t fAnalog; // Flag for anolog or pt-weighted generation
64 Float_t fBias; // Biasing factor
65 Int_t fTrials; // Number of trials
66 Decay_t fForceDecay; // Decay channel forced
67 Int_t fCutOnChild; // Cuts on decay products (children) are enabled/disabled
68 Float_t fChildPtMin; // Children minimum pT
69 Float_t fChildPtMax; // Children maximum pT
70 Float_t fChildPMin; // Children minimum p
71 Float_t fChildPMax; // Children maximum p
72 Float_t fChildPhiMin; // Children minimum phi
73 Float_t fChildPhiMax; // Children maximum phi
74 Float_t fChildThetaMin;// Children minimum theta
75 Float_t fChildThetaMax;// Children maximum theta
76 Float_t fDeltaPt; // pT sampling in steps of fDeltaPt
77 TArrayI fChildSelect; // Children to be selected from decay products
78 AliDecayer *fDecayer; // Pointer to pythia object for decays
80 // check if particle is selected as child
81 Bool_t ChildSelected(Int_t ip);
82 // all kinematic selection goes here
83 Bool_t KinematicSelection(TParticle *particle);
85 ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution