[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 "AliGenerator.h"
#include "GenTypeDefs.h"
#include <TArrayI.h>    

class AliPythia;
class TParticle;

class AliGenPythia : public AliGenerator
{
 public:
    AliGenPythia();
    AliGenPythia(Int_t npart);
    AliGenPythia(const AliGenPythia &Pythia);
    virtual ~AliGenPythia();
    virtual void    Generate();
    virtual void    Init();
    // select process type
    virtual void    SetProcess(Process_t proc=charm) {fProcess=proc;}
    // select structure function
    virtual void    SetStrucFunc(StrucFunc_t func=GRV_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;}
    // force decay type
    virtual void    SetForceDecay(Decay_t decay=semimuonic) {fForceDecay=decay;}
    // get cross section of process
    virtual Float_t GetXsection() {return fXsection;}
    // Check PDG code
    virtual Int_t CheckPDGCode(Int_t pdgcode);
    // Assignment Operator
    AliGenPythia & operator=(const AliGenPythia & rhs);
 protected:
    Process_t   fProcess;       // Process type
    StrucFunc_t fStrucFunc;     // Structure Function
    Decay_t     fForceDecay;    // Decay channel  are forced
    Float_t     fEnergyCMS;     // Centre of mass energy
    Float_t     fKineBias;      // Bias from kinematic selection
    Int_t       fTrials;        // Number of trials
    TArrayI     fParentSelect;  // Parent particles to be selected 
    TArrayI     fChildSelect;   // Decay products to be selected
    Float_t     fXsection;      // Cross-section
    AliPythia   *fPythia;       // Pythia 
    Float_t     fPtHardMin;     // lower pT-hard cut 
    Float_t     fPtHardMax;     // higher pT-hard cut

 private:
    // check if particle is selected as parent particle
    Bool_t ParentSelected(Int_t ip);
    // check if particle is selected as child particle
    Bool_t ChildSelected(Int_t ip);
    // all kinematic selection cuts go here 
    Bool_t KinematicSelection(TParticle *particle);
    // adjust the weight from kinematic cuts
    void   AdjustWeights();

    ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia
};
#endif
Commit	Line	Data
a0134e39	1	#ifndef ALIGENPYTHIA_H
a0134e39	2	#define ALIGENPYTHIA_H
3da30618	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	/* $Id$ */
	7
f87cfe57	8
fe4da5cc	9	#include "AliGenerator.h"
f87cfe57	10	#include "GenTypeDefs.h"
	11	#include <TArrayI.h>
	12
	13	class AliPythia;
	14	class TParticle;
fe4da5cc	15
	16	class AliGenPythia : public AliGenerator
	17	{
fe4da5cc	18	public:
	19	AliGenPythia();
	20	AliGenPythia(Int_t npart);
f87cfe57	21	AliGenPythia(const AliGenPythia &Pythia);
fe4da5cc	22	virtual ~AliGenPythia();
	23	virtual void Generate();
	24	virtual void Init();
	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;}
	34	// force decay type
886b6f73	35	virtual void SetForceDecay(Decay_t decay=semimuonic) {fForceDecay=decay;}
fe4da5cc	36	// get cross section of process
fe4da5cc	37	virtual Float_t GetXsection() {return fXsection;}
a8228d85	38	// Check PDG code
a8228d85	39	virtual Int_t CheckPDGCode(Int_t pdgcode);
f87cfe57	40	// Assignment Operator
f87cfe57	41	AliGenPythia & operator=(const AliGenPythia & rhs);
a0134e39	42	protected:
	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
	55
	56	private:
	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
	64	void AdjustWeights();
	65
f87cfe57	66	ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia
fe4da5cc	67	};
	68	#endif
	69
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