Default for decays is kAll.

[u/mrichter/AliRoot.git] / EVGEN / AliGenPythia.h

#ifndef ALIGENPYTHIA_H
#define ALIGENPYTHIA_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */


#include "AliGenMC.h"
#include "AliPythia.h"

class AliPythia;
class TParticle;

class AliGenPythia : public AliGenMC
{
 public:
    AliGenPythia();
    AliGenPythia(Int_t npart);
    AliGenPythia(const AliGenPythia &Pythia);
    virtual ~AliGenPythia();
    virtual void    Generate();
    virtual void    Init();
    virtual void    SetEventListRange(Int_t eventFirst=-1, Int_t eventLast=-1);
    // select process type
    virtual void    SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
    // select structure function
    virtual void    SetStrucFunc(StrucFunc_t func = kGRV_HO) {fStrucFunc = func;}
    // select pt of hard scattering 
    virtual void    SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
	{fPtHardMin = ptmin; fPtHardMax = ptmax; }
    // set centre of mass energy
    virtual void    SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
    // treat protons as inside nuclei
    virtual void    SetNuclei(Int_t a1, Int_t a2);
    // get cross section of process
    virtual Float_t GetXsection() {return fXsection;}      
    virtual void    FinishRun();
    
    // Assignment Operator
    AliGenPythia & operator=(const AliGenPythia & rhs);
 private:
    Int_t  GenerateMB();
    virtual void    MakeHeader();    
 protected:
    TClonesArray* fParticles;  // Particle  List
    
    Process_t   fProcess;       // Process type
    StrucFunc_t fStrucFunc;     // Structure Function
    Float_t     fEnergyCMS;     // Centre of mass energy
    Float_t     fKineBias;      // Bias from kinematic selection
    Int_t       fTrials;        // Number of trials
    Int_t       fFlavorSelect;  // Heavy Flavor Selection
    Float_t     fXsection;      // Cross-section
    AliPythia   *fPythia;       //! Pythia 
    Float_t     fPtHardMin;     // lower pT-hard cut 
    Float_t     fPtHardMax;     // higher pT-hard cut
    Int_t       fNucA1;         // mass number nucleus side 1
    Int_t       fNucA2;         // mass number nucleus side 2
    Bool_t      fFullEvent;     // Write Full event if true
    AliDecayer  *fDecayer;      //! Pointer to the decayer instance
    Int_t       fDebugEventFirst; // First event to debug
    Int_t       fDebugEventLast;  // Last  event to debug
 private:
    // adjust the weight from kinematic cuts
    void   AdjustWeights();

    ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia
};
#endif