[u/mrichter/AliRoot.git] / EVGEN / AliGenEMCocktail.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id: AliGenEMCocktail.cxx 40702 2010-04-26 13:09:52Z morsch $ */

// Class to create the cocktail for physics with electrons, di-electrons,
// and photons from the decay of the following sources:
// pizero, eta, rho, omega, etaprime, phi
// Kinematic distributions of the sources are taken from AliGenEMlib.
// Decay channels can be selected via the method SetDecayMode.
// Particles can be generated flat in pT with weights according to the
// chosen pT distributions from AliGenEMlib (weighting mode: kNonAnalog),
// or they are generated according to the pT distributions themselves
// (weighting mode: kAnalog)  
 
 
#include <TObjArray.h>
#include <TParticle.h>
#include <TF1.h>
#include <TVirtualMC.h>
#include <TPDGCode.h>
#include <TDatabasePDG.h>
#include "AliGenCocktailEventHeader.h"

#include "AliGenCocktailEntry.h"
#include "AliGenEMCocktail.h"
#include "AliGenEMlib.h"
#include "AliGenBox.h"
#include "AliGenParam.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliStack.h"
#include "AliDecayer.h"
#include "AliDecayerPythia.h"
#include "AliLog.h"
#include "AliGenCorrHF.h"

ClassImp(AliGenEMCocktail)  
  
//________________________________________________________________________
AliGenEMCocktail::AliGenEMCocktail()
:AliGenCocktail(),
   fDecayer(0),
   fDecayMode(kAll),
   fWeightingMode(kNonAnalog),
   fNPart(1000),
  fYieldArray(),
  fPtSelect(0),
  fCentrality(0),
  fV2Systematic(0),
  fForceConv(kFALSE),
  fSelectedParticles(kGenHadrons)
{
  // Constructor

}

//_________________________________________________________________________
AliGenEMCocktail::~AliGenEMCocktail()
{
  // Destructor

}

//_________________________________________________________________________
void AliGenEMCocktail::CreateCocktail()
{
  // create and add sources to the cocktail

  fDecayer->SetForceDecay(fDecayMode);
  fDecayer->ForceDecay();

  // Set kinematic limits
  Double_t ptMin  = fPtMin;
  Double_t ptMax  = fPtMax;
  Double_t yMin   = fYMin;;
  Double_t yMax   = fYMax;;
  Double_t phiMin = fPhiMin*180./TMath::Pi();
  Double_t phiMax = fPhiMax*180./TMath::Pi();
  AliInfo(Form("Ranges pT:%4.1f : %4.1f GeV/c, y:%4.2f : %4.2f, Phi:%5.1f : %5.1f degres",ptMin,ptMax,yMin,yMax,phiMin,phiMax));
  AliInfo(Form("the parametrised sources uses the decay mode %d",fDecayMode));

  //Initialize user selection for Pt Parameterization and centrality:
  AliGenEMlib::SelectParams(fPtSelect,fCentrality,fV2Systematic);

  // Create and add electron sources to the generator
  // pizero
  if(fSelectedParticles&kGenPizero){
  AliGenParam *genpizero=0;
  Char_t namePizero[10];    
  snprintf(namePizero,10,"Pizero");    
  genpizero = new AliGenParam(fNPart/0.925, new AliGenEMlib(), AliGenEMlib::kPizero, "DUMMY");
  genpizero->SetYRange(fYMin/0.925, fYMax/0.925);
  AddSource2Generator(namePizero,genpizero);
  TF1 *fPtPizero = genpizero->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kPizero] = fPtPizero->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kPizero] = fPtPizero->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // eta  
  if(fSelectedParticles&kGenEta){
  AliGenParam *geneta=0;
  Char_t nameEta[10];    
  snprintf(nameEta,10,"Eta");    
  geneta = new AliGenParam(fNPart/0.825, new AliGenEMlib(), AliGenEMlib::kEta, "DUMMY");
  geneta->SetYRange(fYMin/0.825, fYMax/0.825);
  AddSource2Generator(nameEta,geneta);
  TF1 *fPtEta = geneta->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kEta] = fPtEta->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kEta] = fPtEta->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // rho  
  if(fSelectedParticles&kGenRho){
  AliGenParam *genrho=0;
  Char_t nameRho[10];    
  snprintf(nameRho,10,"Rho");    
  genrho = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kRho, "DUMMY");
  genrho->SetYRange(fYMin/0.775, fYMax/0.775);
  AddSource2Generator(nameRho,genrho);
  TF1 *fPtRho = genrho->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kRho] = fPtRho->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kRho] = fPtRho->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }
  
  // omega
  if(fSelectedParticles&kGenOmega){
  AliGenParam *genomega=0;
  Char_t nameOmega[10];    
  snprintf(nameOmega,10,"Omega");    
  genomega = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kOmega, "DUMMY");
  genomega->SetYRange(fYMin/0.775, fYMax/0.775);
  AddSource2Generator(nameOmega,genomega);
  TF1 *fPtOmega = genomega->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kOmega] = fPtOmega->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kOmega] = fPtOmega->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // etaprime
  if(fSelectedParticles&kGenEtaprime){
  AliGenParam *genetaprime=0;
  Char_t nameEtaprime[10];    
  snprintf(nameEtaprime,10,"Etaprime");    
  genetaprime = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kEtaprime, "DUMMY");
  genetaprime->SetYRange(fYMin/0.725, fYMax/0.725);
  AddSource2Generator(nameEtaprime,genetaprime);
  TF1 *fPtEtaprime = genetaprime->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // phi  
  if(fSelectedParticles&kGenPhi){
  AliGenParam *genphi=0;
  Char_t namePhi[10];    
  snprintf(namePhi,10,"Phi");    
  genphi = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kPhi, "DUMMY");
  genphi->SetYRange(fYMin/0.725, fYMax/0.725);
  AddSource2Generator(namePhi,genphi);
  TF1 *fPtPhi = genphi->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kPhi] = fPtPhi->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kPhi] = fPtPhi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // jpsi  
  if(fSelectedParticles&kGenJpsi){
  AliGenParam *genjpsi=0;
  Char_t nameJpsi[10];    
  snprintf(nameJpsi,10,"Jpsi");    
  genjpsi = new AliGenParam(fNPart/0.525, new AliGenEMlib(), AliGenEMlib::kJpsi, "DUMMY");
  genjpsi->SetYRange(fYMin/0.525, fYMax/0.525);
  AddSource2Generator(nameJpsi,genjpsi);
  TF1 *fPtJpsi = genjpsi->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  // direct gamma
  if(fDecayMode!=kGammaEM) return;
  if(fSelectedParticles&kGenDirectRealGamma){
    AliGenParam *genDirectRealG=0;
    Char_t nameDirectRealG[10];    
    snprintf(nameDirectRealG,10,"DirectRealGamma");    
    genDirectRealG = new AliGenParam(fNPart, new AliGenEMlib(), AliGenEMlib::kDirectRealGamma, "DUMMY");
    genDirectRealG->SetYRange(fYMin, fYMax);
    AddSource2Generator(nameDirectRealG,genDirectRealG);
    TF1 *fPtDirectRealG = genDirectRealG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kDirectRealGamma] = fPtDirectRealG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kDirectRealGamma] = fPtDirectRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }

  if(fSelectedParticles&kGenDirectVirtGamma){
    TDatabasePDG::Instance()->AddParticle("DirectVirtGamma","DirectVirtGamma",0,true,0,0,"GaugeBoson",220000);
    AliGenParam *genDirectVirtG=0;
    Char_t nameDirectVirtG[10];    
    snprintf(nameDirectVirtG,10,"DirectVirtGamma");    
    genDirectVirtG = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kDirectVirtGamma, "DUMMY");
    genDirectVirtG->SetYRange(fYMin/0.775, fYMax/0.775);
    AddSource2Generator(nameDirectVirtG,genDirectVirtG);
    TF1 *fPtDirectVirtG = genDirectVirtG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kDirectVirtGamma] = fPtDirectVirtG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kDirectVirtGamma] = fPtDirectVirtG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  }
}

//-------------------------------------------------------------------
void AliGenEMCocktail::AddSource2Generator(Char_t* nameSource, 
					 AliGenParam* const genSource)
{
// add sources to the cocktail
  Double_t phiMin = fPhiMin*180./TMath::Pi();
  Double_t phiMax = fPhiMax*180./TMath::Pi();

  genSource->SetPtRange(fPtMin, fPtMax);  
  genSource->SetPhiRange(phiMin, phiMax);
  genSource->SetWeighting(fWeightingMode);
  genSource->SetForceGammaConversion(fForceConv);
  if (!gMC) genSource->SetDecayer(fDecayer);  
  genSource->Init();
    
  AddGenerator(genSource,nameSource,1.); // Adding Generator    
}

//-------------------------------------------------------------------
void AliGenEMCocktail::Init()
{
  // Initialisation
  TIter next(fEntries);
  AliGenCocktailEntry *entry;
  if (fStack) {
    while((entry = (AliGenCocktailEntry*)next())) {
      entry->Generator()->SetStack(fStack);
    }
  }
}

//_________________________________________________________________________
void AliGenEMCocktail::Generate()
{
  // Generate event 
  TIter next(fEntries);
  AliGenCocktailEntry *entry = 0;
  AliGenCocktailEntry *preventry = 0;
  AliGenerator* gen = 0;

  if (fHeader) delete fHeader;
  fHeader = new AliGenCocktailEventHeader("Electromagnetic Cocktail Header");

  const TObjArray *partArray = gAlice->GetMCApp()->Particles();
    
  // Generate the vertex position used by all generators    
  if(fVertexSmear == kPerEvent) Vertex();

  //Reseting stack
  AliRunLoader * runloader = AliRunLoader::Instance();
  if (runloader)
    if (runloader->Stack())
      runloader->Stack()->Clean();
  
  // Loop over generators and generate events
  Int_t igen = 0;
  Float_t evPlane;
  Rndm(&evPlane,1);
  evPlane*=TMath::Pi()*2;
  while((entry = (AliGenCocktailEntry*)next())) {
    gen = entry->Generator();
    gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
    
    if (fNPart > 0) {
      igen++;	
      if (igen == 1) entry->SetFirst(0);		
      else  entry->SetFirst((partArray->GetEntriesFast())+1);
      gen->SetEventPlane(evPlane);
      gen->Generate();
      entry->SetLast(partArray->GetEntriesFast());
      preventry = entry;
    }
  }  
  next.Reset();

  // Setting weights for proper absolute normalization
  Int_t iPart, iMother;
  Int_t pdgMother = 0;
  Double_t weight = 0.;
  Double_t dNdy = 0.;
  Int_t maxPart = partArray->GetEntriesFast();
  for(iPart=0; iPart<maxPart; iPart++){      
    TParticle *part = gAlice->GetMCApp()->Particle(iPart);
    iMother = part->GetFirstMother();
    TParticle *mother = 0;
    if (iMother>=0){
      mother = gAlice->GetMCApp()->Particle(iMother);
      pdgMother = mother->GetPdgCode();
    }
    else
      pdgMother = part->GetPdgCode();

    switch (pdgMother){
    case 111:
      dNdy = fYieldArray[kPizero];
      break;
    case 221:
      dNdy = fYieldArray[kEta];
      break;
    case 113:
      dNdy = fYieldArray[kRho];
      break;
    case 223:
      dNdy = fYieldArray[kOmega];
      break;
    case 331:
      dNdy = fYieldArray[kEtaprime];
      break;
    case 333:
      dNdy = fYieldArray[kPhi];
      break;
    case 443:
      dNdy = fYieldArray[kJpsi];
      break;
    case 22:
      dNdy = fYieldArray[kDirectRealGamma];
      break;
    case 220000:
      dNdy = fYieldArray[kDirectVirtGamma];
      break;
      
    default:
      dNdy = 0.;
    }

    weight = dNdy*part->GetWeight();
    part->SetWeight(weight);
  }	
  
  fHeader->SetNProduced(maxPart);


  TArrayF eventVertex;
  eventVertex.Set(3);
  for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
  
  fHeader->SetPrimaryVertex(eventVertex);

  gAlice->SetGenEventHeader(fHeader);
}
Commit	Line	Data
e40b9538	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id: AliGenEMCocktail.cxx 40702 2010-04-26 13:09:52Z morsch $ */
	17
4ae1c9f0	18	// Class to create the cocktail for physics with electrons, di-electrons,
e40b9538	19	// and photons from the decay of the following sources:
	20	// pizero, eta, rho, omega, etaprime, phi
	21	// Kinematic distributions of the sources are taken from AliGenEMlib.
	22	// Decay channels can be selected via the method SetDecayMode.
	23	// Particles can be generated flat in pT with weights according to the
	24	// chosen pT distributions from AliGenEMlib (weighting mode: kNonAnalog),
	25	// or they are generated according to the pT distributions themselves
	26	// (weighting mode: kAnalog)
	27
4ae1c9f0	28
e40b9538	29	#include <TObjArray.h>
	30	#include <TParticle.h>
	31	#include <TF1.h>
	32	#include <TVirtualMC.h>
	33	#include <TPDGCode.h>
71443190	34	#include <TDatabasePDG.h>
e40b9538	35	#include "AliGenCocktailEventHeader.h"
	36
	37	#include "AliGenCocktailEntry.h"
	38	#include "AliGenEMCocktail.h"
	39	#include "AliGenEMlib.h"
	40	#include "AliGenBox.h"
	41	#include "AliGenParam.h"
	42	#include "AliMC.h"
	43	#include "AliRun.h"
	44	#include "AliStack.h"
	45	#include "AliDecayer.h"
	46	#include "AliDecayerPythia.h"
	47	#include "AliLog.h"
	48	#include "AliGenCorrHF.h"
	49
	50	ClassImp(AliGenEMCocktail)
	51
	52	//________________________________________________________________________
	53	AliGenEMCocktail::AliGenEMCocktail()
4ae1c9f0	54	:AliGenCocktail(),
e40b9538	55	fDecayer(0),
	56	fDecayMode(kAll),
	57	fWeightingMode(kNonAnalog),
	58	fNPart(1000),
4ae1c9f0	59	fYieldArray(),
	60	fPtSelect(0),
	61	fCentrality(0),
	62	fV2Systematic(0),
	63	fForceConv(kFALSE),
6a8b015a	64	fSelectedParticles(kGenHadrons)
e40b9538	65	{
4ae1c9f0	66	// Constructor
e40b9538	67
	68	}
	69
	70	//_________________________________________________________________________
	71	AliGenEMCocktail::~AliGenEMCocktail()
	72	{
4ae1c9f0	73	// Destructor
e40b9538	74
	75	}
	76
	77	//_________________________________________________________________________
	78	void AliGenEMCocktail::CreateCocktail()
	79	{
4ae1c9f0	80	// create and add sources to the cocktail
e40b9538	81
	82	fDecayer->SetForceDecay(fDecayMode);
	83	fDecayer->ForceDecay();
	84
4ae1c9f0	85	// Set kinematic limits
e40b9538	86	Double_t ptMin = fPtMin;
	87	Double_t ptMax = fPtMax;
	88	Double_t yMin = fYMin;;
	89	Double_t yMax = fYMax;;
	90	Double_t phiMin = fPhiMin*180./TMath::Pi();
	91	Double_t phiMax = fPhiMax*180./TMath::Pi();
	92	AliInfo(Form("Ranges pT:%4.1f : %4.1f GeV/c, y:%4.2f : %4.2f, Phi:%5.1f : %5.1f degres",ptMin,ptMax,yMin,yMax,phiMin,phiMax));
	93	AliInfo(Form("the parametrised sources uses the decay mode %d",fDecayMode));
	94
4ae1c9f0	95	//Initialize user selection for Pt Parameterization and centrality:
	96	AliGenEMlib::SelectParams(fPtSelect,fCentrality,fV2Systematic);
	97
	98	// Create and add electron sources to the generator
4ae1c9f0	99	// pizero
6a8b015a	100	if(fSelectedParticles&kGenPizero){
4ae1c9f0	101	AliGenParam *genpizero=0;
e40b9538	102	Char_t namePizero[10];
4ae1c9f0	103	snprintf(namePizero,10,"Pizero");
71443190	104	genpizero = new AliGenParam(fNPart/0.925, new AliGenEMlib(), AliGenEMlib::kPizero, "DUMMY");
71443190	105	genpizero->SetYRange(fYMin/0.925, fYMax/0.925);
e40b9538	106	AddSource2Generator(namePizero,genpizero);
e40b9538	107	TF1 *fPtPizero = genpizero->GetPt();
faf00b0d	108	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	109	fYieldArray[kPizero] = fPtPizero->Integral(fPtMin,fPtMax,1.e-6);
faf00b0d	110	#else
6a8b015a	111	fYieldArray[kPizero] = fPtPizero->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	112	#endif
6a8b015a	113	}
4ae1c9f0	114
4ae1c9f0	115	// eta
6a8b015a	116	if(fSelectedParticles&kGenEta){
4ae1c9f0	117	AliGenParam *geneta=0;
e40b9538	118	Char_t nameEta[10];
4ae1c9f0	119	snprintf(nameEta,10,"Eta");
71443190	120	geneta = new AliGenParam(fNPart/0.825, new AliGenEMlib(), AliGenEMlib::kEta, "DUMMY");
71443190	121	geneta->SetYRange(fYMin/0.825, fYMax/0.825);
e40b9538	122	AddSource2Generator(nameEta,geneta);
e40b9538	123	TF1 *fPtEta = geneta->GetPt();
4ae1c9f0	124	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	125	fYieldArray[kEta] = fPtEta->Integral(fPtMin,fPtMax,1.e-6);
4ae1c9f0	126	#else
6a8b015a	127	fYieldArray[kEta] = fPtEta->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	128	#endif
6a8b015a	129	}
4ae1c9f0	130
4ae1c9f0	131	// rho
6a8b015a	132	if(fSelectedParticles&kGenRho){
4ae1c9f0	133	AliGenParam *genrho=0;
e40b9538	134	Char_t nameRho[10];
4ae1c9f0	135	snprintf(nameRho,10,"Rho");
71443190	136	genrho = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kRho, "DUMMY");
71443190	137	genrho->SetYRange(fYMin/0.775, fYMax/0.775);
e40b9538	138	AddSource2Generator(nameRho,genrho);
e40b9538	139	TF1 *fPtRho = genrho->GetPt();
faf00b0d	140	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	141	fYieldArray[kRho] = fPtRho->Integral(fPtMin,fPtMax,1.e-6);
faf00b0d	142	#else
6a8b015a	143	fYieldArray[kRho] = fPtRho->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	144	#endif
6a8b015a	145	}
4ae1c9f0	146
4ae1c9f0	147	// omega
6a8b015a	148	if(fSelectedParticles&kGenOmega){
4ae1c9f0	149	AliGenParam *genomega=0;
e40b9538	150	Char_t nameOmega[10];
4ae1c9f0	151	snprintf(nameOmega,10,"Omega");
71443190	152	genomega = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kOmega, "DUMMY");
71443190	153	genomega->SetYRange(fYMin/0.775, fYMax/0.775);
e40b9538	154	AddSource2Generator(nameOmega,genomega);
e40b9538	155	TF1 *fPtOmega = genomega->GetPt();
faf00b0d	156	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	157	fYieldArray[kOmega] = fPtOmega->Integral(fPtMin,fPtMax,1.e-6);
faf00b0d	158	#else
6a8b015a	159	fYieldArray[kOmega] = fPtOmega->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	160	#endif
6a8b015a	161	}
4ae1c9f0	162
4ae1c9f0	163	// etaprime
6a8b015a	164	if(fSelectedParticles&kGenEtaprime){
4ae1c9f0	165	AliGenParam *genetaprime=0;
e40b9538	166	Char_t nameEtaprime[10];
4ae1c9f0	167	snprintf(nameEtaprime,10,"Etaprime");
71443190	168	genetaprime = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kEtaprime, "DUMMY");
71443190	169	genetaprime->SetYRange(fYMin/0.725, fYMax/0.725);
e40b9538	170	AddSource2Generator(nameEtaprime,genetaprime);
e40b9538	171	TF1 *fPtEtaprime = genetaprime->GetPt();
faf00b0d	172	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	173	fYieldArray[kEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,1.e-6);
faf00b0d	174	#else
6a8b015a	175	fYieldArray[kEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	176	#endif
6a8b015a	177	}
4ae1c9f0	178
4ae1c9f0	179	// phi
6a8b015a	180	if(fSelectedParticles&kGenPhi){
4ae1c9f0	181	AliGenParam *genphi=0;
e40b9538	182	Char_t namePhi[10];
4ae1c9f0	183	snprintf(namePhi,10,"Phi");
71443190	184	genphi = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kPhi, "DUMMY");
71443190	185	genphi->SetYRange(fYMin/0.725, fYMax/0.725);
e40b9538	186	AddSource2Generator(namePhi,genphi);
e40b9538	187	TF1 *fPtPhi = genphi->GetPt();
faf00b0d	188	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	189	fYieldArray[kPhi] = fPtPhi->Integral(fPtMin,fPtMax,1.e-6);
faf00b0d	190	#else
6a8b015a	191	fYieldArray[kPhi] = fPtPhi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	192	#endif
6a8b015a	193	}
4ae1c9f0	194
4ae1c9f0	195	// jpsi
6a8b015a	196	if(fSelectedParticles&kGenJpsi){
4ae1c9f0	197	AliGenParam *genjpsi=0;
	198	Char_t nameJpsi[10];
	199	snprintf(nameJpsi,10,"Jpsi");
71443190	200	genjpsi = new AliGenParam(fNPart/0.525, new AliGenEMlib(), AliGenEMlib::kJpsi, "DUMMY");
71443190	201	genjpsi->SetYRange(fYMin/0.525, fYMax/0.525);
4ae1c9f0	202	AddSource2Generator(nameJpsi,genjpsi);
	203	TF1 *fPtJpsi = genjpsi->GetPt();
	204	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	205	fYieldArray[kJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,1.e-6);
4ae1c9f0	206	#else
6a8b015a	207	fYieldArray[kJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
71443190	208	#endif
6a8b015a	209	}
71443190	210
6a8b015a	211	// direct gamma
	212	if(fDecayMode!=kGammaEM) return;
	213	if(fSelectedParticles&kGenDirectRealGamma){
	214	AliGenParam *genDirectRealG=0;
	215	Char_t nameDirectRealG[10];
	216	snprintf(nameDirectRealG,10,"DirectRealGamma");
	217	genDirectRealG = new AliGenParam(fNPart, new AliGenEMlib(), AliGenEMlib::kDirectRealGamma, "DUMMY");
	218	genDirectRealG->SetYRange(fYMin, fYMax);
	219	AddSource2Generator(nameDirectRealG,genDirectRealG);
	220	TF1 *fPtDirectRealG = genDirectRealG->GetPt();
71443190	221	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	222	fYieldArray[kDirectRealGamma] = fPtDirectRealG->Integral(fPtMin,fPtMax,1.e-6);
71443190	223	#else
6a8b015a	224	fYieldArray[kDirectRealGamma] = fPtDirectRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
71443190	225	#endif
6a8b015a	226	}
71443190	227
6a8b015a	228	if(fSelectedParticles&kGenDirectVirtGamma){
	229	TDatabasePDG::Instance()->AddParticle("DirectVirtGamma","DirectVirtGamma",0,true,0,0,"GaugeBoson",220000);
	230	AliGenParam *genDirectVirtG=0;
	231	Char_t nameDirectVirtG[10];
	232	snprintf(nameDirectVirtG,10,"DirectVirtGamma");
	233	genDirectVirtG = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kDirectVirtGamma, "DUMMY");
	234	genDirectVirtG->SetYRange(fYMin/0.775, fYMax/0.775);
	235	AddSource2Generator(nameDirectVirtG,genDirectVirtG);
	236	TF1 *fPtDirectVirtG = genDirectVirtG->GetPt();
71443190	237	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
6a8b015a	238	fYieldArray[kDirectVirtGamma] = fPtDirectVirtG->Integral(fPtMin,fPtMax,1.e-6);
71443190	239	#else
6a8b015a	240	fYieldArray[kDirectVirtGamma] = fPtDirectVirtG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
71443190	241	#endif
71443190	242	}
e40b9538	243	}
	244
	245	//-------------------------------------------------------------------
	246	void AliGenEMCocktail::AddSource2Generator(Char_t* nameSource,
	247	AliGenParam* const genSource)
	248	{
	249	// add sources to the cocktail
	250	Double_t phiMin = fPhiMin*180./TMath::Pi();
	251	Double_t phiMax = fPhiMax*180./TMath::Pi();
	252
	253	genSource->SetPtRange(fPtMin, fPtMax);
e40b9538	254	genSource->SetPhiRange(phiMin, phiMax);
e40b9538	255	genSource->SetWeighting(fWeightingMode);
4ae1c9f0	256	genSource->SetForceGammaConversion(fForceConv);
e40b9538	257	if (!gMC) genSource->SetDecayer(fDecayer);
	258	genSource->Init();
	259
	260	AddGenerator(genSource,nameSource,1.); // Adding Generator
	261	}
	262
	263	//-------------------------------------------------------------------
	264	void AliGenEMCocktail::Init()
	265	{
4ae1c9f0	266	// Initialisation
e40b9538	267	TIter next(fEntries);
	268	AliGenCocktailEntry *entry;
	269	if (fStack) {
	270	while((entry = (AliGenCocktailEntry*)next())) {
	271	entry->Generator()->SetStack(fStack);
	272	}
	273	}
	274	}
	275
	276	//_________________________________________________________________________
	277	void AliGenEMCocktail::Generate()
	278	{
4ae1c9f0	279	// Generate event
e40b9538	280	TIter next(fEntries);
	281	AliGenCocktailEntry *entry = 0;
	282	AliGenCocktailEntry *preventry = 0;
	283	AliGenerator* gen = 0;
	284
	285	if (fHeader) delete fHeader;
	286	fHeader = new AliGenCocktailEventHeader("Electromagnetic Cocktail Header");
	287
	288	const TObjArray *partArray = gAlice->GetMCApp()->Particles();
	289
4ae1c9f0	290	// Generate the vertex position used by all generators
e40b9538	291	if(fVertexSmear == kPerEvent) Vertex();
e40b9538	292
4ae1c9f0	293	//Reseting stack
e40b9538	294	AliRunLoader * runloader = AliRunLoader::Instance();
	295	if (runloader)
	296	if (runloader->Stack())
	297	runloader->Stack()->Clean();
	298
4ae1c9f0	299	// Loop over generators and generate events
e40b9538	300	Int_t igen = 0;
6078e216	301	Float_t evPlane;
	302	Rndm(&evPlane,1);
	303	evPlane=TMath::Pi()2;
e40b9538	304	while((entry = (AliGenCocktailEntry*)next())) {
e40b9538	305	gen = entry->Generator();
e40b9538	306	gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
	307
	308	if (fNPart > 0) {
	309	igen++;
	310	if (igen == 1) entry->SetFirst(0);
	311	else entry->SetFirst((partArray->GetEntriesFast())+1);
6078e216	312	gen->SetEventPlane(evPlane);
e40b9538	313	gen->Generate();
	314	entry->SetLast(partArray->GetEntriesFast());
	315	preventry = entry;
	316	}
	317	}
	318	next.Reset();
	319
4ae1c9f0	320	// Setting weights for proper absolute normalization
e40b9538	321	Int_t iPart, iMother;
	322	Int_t pdgMother = 0;
	323	Double_t weight = 0.;
	324	Double_t dNdy = 0.;
	325	Int_t maxPart = partArray->GetEntriesFast();
	326	for(iPart=0; iPart<maxPart; iPart++){
	327	TParticle *part = gAlice->GetMCApp()->Particle(iPart);
	328	iMother = part->GetFirstMother();
	329	TParticle *mother = 0;
	330	if (iMother>=0){
	331	mother = gAlice->GetMCApp()->Particle(iMother);
	332	pdgMother = mother->GetPdgCode();
	333	}
	334	else
	335	pdgMother = part->GetPdgCode();
71443190	336
e40b9538	337	switch (pdgMother){
e40b9538	338	case 111:
6a8b015a	339	dNdy = fYieldArray[kPizero];
e40b9538	340	break;
e40b9538	341	case 221:
6a8b015a	342	dNdy = fYieldArray[kEta];
e40b9538	343	break;
e40b9538	344	case 113:
6a8b015a	345	dNdy = fYieldArray[kRho];
e40b9538	346	break;
e40b9538	347	case 223:
6a8b015a	348	dNdy = fYieldArray[kOmega];
e40b9538	349	break;
e40b9538	350	case 331:
6a8b015a	351	dNdy = fYieldArray[kEtaprime];
e40b9538	352	break;
e40b9538	353	case 333:
6a8b015a	354	dNdy = fYieldArray[kPhi];
e40b9538	355	break;
4ae1c9f0	356	case 443:
6a8b015a	357	dNdy = fYieldArray[kJpsi];
	358	break;
	359	case 22:
	360	dNdy = fYieldArray[kDirectRealGamma];
4ae1c9f0	361	break;
6a8b015a	362	case 220000:
	363	dNdy = fYieldArray[kDirectVirtGamma];
	364	break;
	365
e40b9538	366	default:
	367	dNdy = 0.;
	368	}
71443190	369
e40b9538	370	weight = dNdy*part->GetWeight();
	371	part->SetWeight(weight);
	372	}
	373
	374	fHeader->SetNProduced(maxPart);
	375
	376
	377	TArrayF eventVertex;
	378	eventVertex.Set(3);
	379	for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
	380
	381	fHeader->SetPrimaryVertex(eventVertex);
	382
	383	gAlice->SetGenEventHeader(fHeader);
	384	}