[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 "AliPythia.h"
#include "AliDecayer.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 = 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;}
    // force decay type
    virtual void    SetForceDecay(Decay_t decay = kSemiMuonic) {fForceDecay = decay;}
    // 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;}
    // Check PDG code
    virtual Int_t   CheckPDGCode(Int_t pdgcode);
    virtual void    FinishRun();
    
    // 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
    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
 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"
f1a48a38	10	#include "AliPythia.h"
f1a48a38	11	#include "AliDecayer.h"
f87cfe57	12	#include <TArrayI.h>
	13
	14	class AliPythia;
	15	class TParticle;
fe4da5cc	16
	17	class AliGenPythia : public AliGenerator
	18	{
fe4da5cc	19	public:
	20	AliGenPythia();
	21	AliGenPythia(Int_t npart);
f87cfe57	22	AliGenPythia(const AliGenPythia &Pythia);
fe4da5cc	23	virtual ~AliGenPythia();
	24	virtual void Generate();
	25	virtual void Init();
	26	// select process type
f1a48a38	27	virtual void SetProcess(Process_t proc = kPyCharm) {fProcess = proc;}
fe4da5cc	28	// select structure function
f1a48a38	29	virtual void SetStrucFunc(StrucFunc_t func = kGRV_HO) {fStrucFunc = func;}
fe4da5cc	30	// select pt of hard scattering
f1a48a38	31	virtual void SetPtHard(Float_t ptmin = 0, Float_t ptmax = 1.e10)
f1a48a38	32	{fPtHardMin = ptmin; fPtHardMax = ptmax; }
fe4da5cc	33	// set centre of mass energy
f1a48a38	34	virtual void SetEnergyCMS(Float_t energy = 5500) {fEnergyCMS = energy;}
fe4da5cc	35	// force decay type
f1a48a38	36	virtual void SetForceDecay(Decay_t decay = kSemiMuonic) {fForceDecay = decay;}
811826d8	37	// treat protons as inside nuclei
811826d8	38	virtual void SetNuclei(Int_t a1, Int_t a2);
fe4da5cc	39	// get cross section of process
fe4da5cc	40	virtual Float_t GetXsection() {return fXsection;}
a8228d85	41	// Check PDG code
f1a48a38	42	virtual Int_t CheckPDGCode(Int_t pdgcode);
9faa0850	43	virtual void FinishRun();
9faa0850	44
f87cfe57	45	// Assignment Operator
f87cfe57	46	AliGenPythia & operator=(const AliGenPythia & rhs);
a0134e39	47	protected:
	48	Process_t fProcess; // Process type
	49	StrucFunc_t fStrucFunc; // Structure Function
	50	Decay_t fForceDecay; // Decay channel are forced
	51	Float_t fEnergyCMS; // Centre of mass energy
	52	Float_t fKineBias; // Bias from kinematic selection
	53	Int_t fTrials; // Number of trials
	54	TArrayI fParentSelect; // Parent particles to be selected
	55	TArrayI fChildSelect; // Decay products to be selected
	56	Float_t fXsection; // Cross-section
a8a6107b	57	AliPythia *fPythia; //! Pythia
a0134e39	58	Float_t fPtHardMin; // lower pT-hard cut
a0134e39	59	Float_t fPtHardMax; // higher pT-hard cut
811826d8	60	Int_t fNucA1; // mass number nucleus side 1
811826d8	61	Int_t fNucA2; // mass number nucleus side 2
f1a48a38	62	Bool_t fFullEvent; // Write Full event if true
c78d7f8c	63	AliDecayer *fDecayer; // ! pointer to the decayer instance
a0134e39	64	private:
	65	// check if particle is selected as parent particle
	66	Bool_t ParentSelected(Int_t ip);
	67	// check if particle is selected as child particle
	68	Bool_t ChildSelected(Int_t ip);
	69	// all kinematic selection cuts go here
	70	Bool_t KinematicSelection(TParticle *particle);
	71	// adjust the weight from kinematic cuts
	72	void AdjustWeights();
	73
f87cfe57	74	ClassDef(AliGenPythia,1) // AliGenerator interface to Pythia
fe4da5cc	75	};
	76	#endif
	77
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