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 "GenTypeDefs.h"
17 //-------------------------------------------------------------
18 class AliGenParam : public AliGenerator
22 AliGenParam(Int_t npart, AliGenLib * Library, Param_t param, char* tname=0);
23 AliGenParam(Int_t npart, Param_t param, char* tname=0);
24 AliGenParam(Int_t npart, Param_t param,
25 Double_t (*PtPara)(Double_t*, Double_t*),
26 Double_t (*YPara )(Double_t*, Double_t*),
28 AliGenParam(const AliGenParam &Param);
30 virtual ~AliGenParam();
31 virtual void Generate();
33 // select particle type
34 virtual void SetParam(Param_t param=jpsi_p) {fParam=param;}
36 virtual void SetForceDecay(Decay_t decay=dimuon) {fForceDecay=decay;}
37 virtual void SetWeighting(Weighting_t flag=analog) {fAnalog=flag;}
38 virtual void SetCutOnChild(Int_t flag=0) {fCutOnChild=flag;}
39 virtual void SetChildMomentumRange(Float_t pmin=0, Float_t pmax=1.e10)
40 {fChildPMin = pmin; fChildPMax = pmax;}
41 virtual void SetChildPtRange(Float_t ptmin=0, Float_t ptmax=20.)
42 {fChildPtMin = ptmin; fChildPtMax = ptmax;}
43 virtual void SetChildPhiRange(Float_t phimin=-180., Float_t phimax=180)
44 {fChildPhiMin = TMath::Pi()*phimin/180;
45 fChildPhiMax = TMath::Pi()*phimax/180;}
46 virtual void SetChildThetaRange(Float_t thetamin=0, Float_t thetamax=180)
47 {fChildThetaMin = TMath::Pi()*thetamin/180;
48 fChildThetaMax = TMath::Pi()*thetamax/180;}
49 virtual void SetDeltaPt(Float_t delta=0.01) {fDeltaPt=delta;}
51 AliGenParam & operator=(const AliGenParam & rhs);
53 Double_t (*fPtParaFunc)(Double_t*, Double_t*); //! Pointer to Pt parametrisation function
54 Double_t (*fYParaFunc )(Double_t*, Double_t*); //! Pointer to Y parametrisation function
55 Int_t (*fIpParaFunc )(); //! Pointer to particle type parametrisation function
56 TF1* fPtPara; // Transverse momentum parameterisation
57 TF1* fYPara; // Rapidity parameterisation
58 Param_t fParam; // Parameterisation type
59 Float_t fdNdy0; // central multiplicity per event
60 Float_t fYWgt; // Y-weight
61 Float_t fPtWgt; // Pt-weight
62 Weighting_t fAnalog; // Flag for anolog or pt-weighted generation
63 Float_t fBias; // Biasing factor
64 Int_t fTrials; // Number of trials
65 Decay_t fForceDecay; // Decay channel forced
66 Int_t fCutOnChild; // Cuts on decay products (children) are enabled/disabled
67 Float_t fChildPtMin; // Children minimum pT
68 Float_t fChildPtMax; // Children maximum pT
69 Float_t fChildPMin; // Children minimum p
70 Float_t fChildPMax; // Children maximum p
71 Float_t fChildPhiMin; // Children minimum phi
72 Float_t fChildPhiMax; // Children maximum phi
73 Float_t fChildThetaMin;// Children minimum theta
74 Float_t fChildThetaMax;// Children maximum theta
75 Float_t fDeltaPt; // pT sampling in steps of fDeltaPt
76 TArrayI fChildSelect; // Children to be selected from decay products
77 AliPythia *fPythia; // Pointer to pythia object for decays
79 // check if particle is selected as child
80 Bool_t ChildSelected(Int_t ip);
81 // all kinematic selection goes here
82 Bool_t KinematicSelection(TParticle *particle);
84 ClassDef(AliGenParam,1) // Generator using parameterised pt- and y-distribution