[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),
  fHeaviestParticle(kGenJpsi)
{
  // 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(fHeaviestParticle<kGenPizero)return;
  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[kGenPizero] = fPtPizero->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenPizero] = fPtPizero->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // eta  
  if(fHeaviestParticle<kGenEta)return;
  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[kGenEta] = fPtEta->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenEta] = fPtEta->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // rho  
  if(fHeaviestParticle<kGenRho)return;
  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[kGenRho] = fPtRho->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenRho] = fPtRho->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif
  
  // omega
  if(fHeaviestParticle<kGenOmega)return;
  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[kGenOmega] = fPtOmega->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenOmega] = fPtOmega->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // etaprime
  if(fHeaviestParticle<kGenEtaprime)return;
  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[kGenEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // phi  
  if(fHeaviestParticle<kGenPhi)return;
  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[kGenPhi] = fPtPhi->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenPhi] = fPtPhi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // jpsi  
  if(fHeaviestParticle<kGenJpsi)return;
  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[kGenJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,1.e-6);
#else
  fYieldArray[kGenJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

  // prompt gamma
  if(fDecayMode==kGammaEM){
    if(fHeaviestParticle<kGenPromptRealGamma)return;
    TDatabasePDG::Instance()->AddParticle("PromptRealGamma","PromptRealGamma",0,true,0,0,"GaugeBoson",221000);
    //gMC->DefineParticle(221000, "PromptGamma", kPTGamma, 0, 0, 0,"Gamma", 0.0, 0, 0, 0, 0, 0, 0, 0, 0, kFALSE);
    AliGenParam *genPromptRealG=0;
    Char_t namePromptRealG[10];    
    snprintf(namePromptRealG,10,"PromptRealGamma");    
    genPromptRealG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kPromptRealGamma, "DUMMY");
    genPromptRealG->SetYRange(fYMin, fYMax);
    AddSource2Generator(namePromptRealG,genPromptRealG);
    TF1 *fPtPromptRealG = genPromptRealG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kGenPromptRealGamma] = fPtPromptRealG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kGenPromptRealGamma] = fPtPromptRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

    if(fHeaviestParticle<kGenThermRealGamma)return;
    TDatabasePDG::Instance()->AddParticle("ThermRealGamma","ThermRealGamma",0,true,0,0,"GaugeBoson",222000);
    //gMC->DefineParticle(221000, "ThermGamma", kPTGamma, 0, 0, 0,"Gamma", 0.0, 0, 0, 0, 0, 0, 0, 0, 0, kFALSE);
    AliGenParam *genThermRealG=0;
    Char_t nameThermRealG[10];    
    snprintf(nameThermRealG,10,"ThermRealGamma");    
    genThermRealG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kThermRealGamma, "DUMMY");
    genThermRealG->SetYRange(fYMin, fYMax);
    AddSource2Generator(nameThermRealG,genThermRealG);
    TF1 *fPtThermRealG = genThermRealG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kGenThermRealGamma] = fPtThermRealG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kGenThermRealGamma] = fPtThermRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

    if(fHeaviestParticle<kGenPromptVirtGamma)return;
    TDatabasePDG::Instance()->AddParticle("PromptVirtGamma","PromptVirtGamma",0,true,0,0,"GaugeBoson",223000);
    AliGenParam *genPromptVirtG=0;
    Char_t namePromptVirtG[10];    
    snprintf(namePromptVirtG,10,"PromptVirtGamma");    
    genPromptVirtG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kPromptVirtGamma, "DUMMY");
    genPromptVirtG->SetYRange(fYMin, fYMax);
    AddSource2Generator(namePromptVirtG,genPromptVirtG);
    TF1 *fPtPromptVirtG = genPromptVirtG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kGenPromptVirtGamma] = fPtPromptVirtG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kGenPromptVirtGamma] = fPtPromptVirtG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
#endif

    if(fHeaviestParticle<kGenThermVirtGamma)return;
    TDatabasePDG::Instance()->AddParticle("ThermVirtGamma","ThermVirtGamma",0,true,0,0,"GaugeBoson",224000);
    AliGenParam *genThermVirtG=0;
    Char_t nameThermVirtG[10];    
    snprintf(nameThermVirtG,10,"ThermVirtGamma");    
    genThermVirtG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kThermVirtGamma, "DUMMY");
    genThermVirtG->SetYRange(fYMin, fYMax);
    AddSource2Generator(nameThermVirtG,genThermVirtG);
    TF1 *fPtThermVirtG = genThermVirtG->GetPt();
#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
    fYieldArray[kGenThermVirtGamma] = fPtThermVirtG->Integral(fPtMin,fPtMax,1.e-6);
#else
    fYieldArray[kGenThermVirtGamma] = fPtThermVirtG->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[kGenPizero];
      break;
    case 221:
      dNdy = fYieldArray[kGenEta];
      break;
    case 113:
      dNdy = fYieldArray[kGenRho];
      break;
    case 223:
      dNdy = fYieldArray[kGenOmega];
      break;
    case 331:
      dNdy = fYieldArray[kGenEtaprime];
      break;
    case 333:
      dNdy = fYieldArray[kGenPhi];
      break;
    case 443:
      dNdy = fYieldArray[kGenJpsi];
      break;
    default:
      dNdy = 0.;
    }

    switch (pdgMother){
    case 221000:
      dNdy = fYieldArray[kGenPromptRealGamma];
      break;
    case 223000:
      dNdy = fYieldArray[kGenPromptVirtGamma];
      break;
    case 222000:
      dNdy = fYieldArray[kGenThermRealGamma];
      break;      
    case 224000:
      dNdy = fYieldArray[kGenThermVirtGamma];
      break;   
    }
    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),
71443190	64	fHeaviestParticle(kGenJpsi)
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
71443190	100	if(fHeaviestParticle<kGenPizero)return;
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)
	109	fYieldArray[kGenPizero] = fPtPizero->Integral(fPtMin,fPtMax,1.e-6);
	110	#else
4ae1c9f0	111	fYieldArray[kGenPizero] = fPtPizero->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	112	#endif
4ae1c9f0	113
	114	// eta
	115	if(fHeaviestParticle<kGenEta)return;
	116	AliGenParam *geneta=0;
e40b9538	117	Char_t nameEta[10];
4ae1c9f0	118	snprintf(nameEta,10,"Eta");
71443190	119	geneta = new AliGenParam(fNPart/0.825, new AliGenEMlib(), AliGenEMlib::kEta, "DUMMY");
71443190	120	geneta->SetYRange(fYMin/0.825, fYMax/0.825);
e40b9538	121	AddSource2Generator(nameEta,geneta);
e40b9538	122	TF1 *fPtEta = geneta->GetPt();
4ae1c9f0	123	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
faf00b0d	124	fYieldArray[kGenEta] = fPtEta->Integral(fPtMin,fPtMax,1.e-6);
4ae1c9f0	125	#else
4ae1c9f0	126	fYieldArray[kGenEta] = fPtEta->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	127	#endif
4ae1c9f0	128
	129	// rho
	130	if(fHeaviestParticle<kGenRho)return;
	131	AliGenParam *genrho=0;
e40b9538	132	Char_t nameRho[10];
4ae1c9f0	133	snprintf(nameRho,10,"Rho");
71443190	134	genrho = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kRho, "DUMMY");
71443190	135	genrho->SetYRange(fYMin/0.775, fYMax/0.775);
e40b9538	136	AddSource2Generator(nameRho,genrho);
e40b9538	137	TF1 *fPtRho = genrho->GetPt();
faf00b0d	138	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	139	fYieldArray[kGenRho] = fPtRho->Integral(fPtMin,fPtMax,1.e-6);
	140	#else
4ae1c9f0	141	fYieldArray[kGenRho] = fPtRho->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	142	#endif
4ae1c9f0	143
	144	// omega
	145	if(fHeaviestParticle<kGenOmega)return;
	146	AliGenParam *genomega=0;
e40b9538	147	Char_t nameOmega[10];
4ae1c9f0	148	snprintf(nameOmega,10,"Omega");
71443190	149	genomega = new AliGenParam(fNPart/0.775, new AliGenEMlib(), AliGenEMlib::kOmega, "DUMMY");
71443190	150	genomega->SetYRange(fYMin/0.775, fYMax/0.775);
e40b9538	151	AddSource2Generator(nameOmega,genomega);
e40b9538	152	TF1 *fPtOmega = genomega->GetPt();
faf00b0d	153	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	154	fYieldArray[kGenOmega] = fPtOmega->Integral(fPtMin,fPtMax,1.e-6);
	155	#else
4ae1c9f0	156	fYieldArray[kGenOmega] = fPtOmega->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	157	#endif
4ae1c9f0	158
	159	// etaprime
	160	if(fHeaviestParticle<kGenEtaprime)return;
	161	AliGenParam *genetaprime=0;
e40b9538	162	Char_t nameEtaprime[10];
4ae1c9f0	163	snprintf(nameEtaprime,10,"Etaprime");
71443190	164	genetaprime = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kEtaprime, "DUMMY");
71443190	165	genetaprime->SetYRange(fYMin/0.725, fYMax/0.725);
e40b9538	166	AddSource2Generator(nameEtaprime,genetaprime);
e40b9538	167	TF1 *fPtEtaprime = genetaprime->GetPt();
faf00b0d	168	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	169	fYieldArray[kGenEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,1.e-6);
	170	#else
4ae1c9f0	171	fYieldArray[kGenEtaprime] = fPtEtaprime->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	172	#endif
4ae1c9f0	173
	174	// phi
	175	if(fHeaviestParticle<kGenPhi)return;
	176	AliGenParam *genphi=0;
e40b9538	177	Char_t namePhi[10];
4ae1c9f0	178	snprintf(namePhi,10,"Phi");
71443190	179	genphi = new AliGenParam(fNPart/0.725, new AliGenEMlib(), AliGenEMlib::kPhi, "DUMMY");
71443190	180	genphi->SetYRange(fYMin/0.725, fYMax/0.725);
e40b9538	181	AddSource2Generator(namePhi,genphi);
e40b9538	182	TF1 *fPtPhi = genphi->GetPt();
faf00b0d	183	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	184	fYieldArray[kGenPhi] = fPtPhi->Integral(fPtMin,fPtMax,1.e-6);
	185	#else
4ae1c9f0	186	fYieldArray[kGenPhi] = fPtPhi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
faf00b0d	187	#endif
4ae1c9f0	188
	189	// jpsi
	190	if(fHeaviestParticle<kGenJpsi)return;
	191	AliGenParam *genjpsi=0;
	192	Char_t nameJpsi[10];
	193	snprintf(nameJpsi,10,"Jpsi");
71443190	194	genjpsi = new AliGenParam(fNPart/0.525, new AliGenEMlib(), AliGenEMlib::kJpsi, "DUMMY");
71443190	195	genjpsi->SetYRange(fYMin/0.525, fYMax/0.525);
4ae1c9f0	196	AddSource2Generator(nameJpsi,genjpsi);
	197	TF1 *fPtJpsi = genjpsi->GetPt();
	198	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	199	fYieldArray[kGenJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,1.e-6);
	200	#else
	201	fYieldArray[kGenJpsi] = fPtJpsi->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
	202	#endif
	203
71443190	204	// prompt gamma
	205	if(fDecayMode==kGammaEM){
	206	if(fHeaviestParticle<kGenPromptRealGamma)return;
	207	TDatabasePDG::Instance()->AddParticle("PromptRealGamma","PromptRealGamma",0,true,0,0,"GaugeBoson",221000);
	208	//gMC->DefineParticle(221000, "PromptGamma", kPTGamma, 0, 0, 0,"Gamma", 0.0, 0, 0, 0, 0, 0, 0, 0, 0, kFALSE);
	209	AliGenParam *genPromptRealG=0;
	210	Char_t namePromptRealG[10];
	211	snprintf(namePromptRealG,10,"PromptRealGamma");
	212	genPromptRealG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kPromptRealGamma, "DUMMY");
	213	genPromptRealG->SetYRange(fYMin, fYMax);
	214	AddSource2Generator(namePromptRealG,genPromptRealG);
	215	TF1 *fPtPromptRealG = genPromptRealG->GetPt();
	216	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	217	fYieldArray[kGenPromptRealGamma] = fPtPromptRealG->Integral(fPtMin,fPtMax,1.e-6);
	218	#else
	219	fYieldArray[kGenPromptRealGamma] = fPtPromptRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
	220	#endif
	221
	222	if(fHeaviestParticle<kGenThermRealGamma)return;
	223	TDatabasePDG::Instance()->AddParticle("ThermRealGamma","ThermRealGamma",0,true,0,0,"GaugeBoson",222000);
	224	//gMC->DefineParticle(221000, "ThermGamma", kPTGamma, 0, 0, 0,"Gamma", 0.0, 0, 0, 0, 0, 0, 0, 0, 0, kFALSE);
	225	AliGenParam *genThermRealG=0;
	226	Char_t nameThermRealG[10];
	227	snprintf(nameThermRealG,10,"ThermRealGamma");
	228	genThermRealG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kThermRealGamma, "DUMMY");
	229	genThermRealG->SetYRange(fYMin, fYMax);
	230	AddSource2Generator(nameThermRealG,genThermRealG);
	231	TF1 *fPtThermRealG = genThermRealG->GetPt();
	232	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	233	fYieldArray[kGenThermRealGamma] = fPtThermRealG->Integral(fPtMin,fPtMax,1.e-6);
	234	#else
	235	fYieldArray[kGenThermRealGamma] = fPtThermRealG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
	236	#endif
	237
	238	if(fHeaviestParticle<kGenPromptVirtGamma)return;
	239	TDatabasePDG::Instance()->AddParticle("PromptVirtGamma","PromptVirtGamma",0,true,0,0,"GaugeBoson",223000);
	240	AliGenParam *genPromptVirtG=0;
	241	Char_t namePromptVirtG[10];
	242	snprintf(namePromptVirtG,10,"PromptVirtGamma");
	243	genPromptVirtG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kPromptVirtGamma, "DUMMY");
	244	genPromptVirtG->SetYRange(fYMin, fYMax);
	245	AddSource2Generator(namePromptVirtG,genPromptVirtG);
	246	TF1 *fPtPromptVirtG = genPromptVirtG->GetPt();
	247	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	248	fYieldArray[kGenPromptVirtGamma] = fPtPromptVirtG->Integral(fPtMin,fPtMax,1.e-6);
	249	#else
	250	fYieldArray[kGenPromptVirtGamma] = fPtPromptVirtG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
	251	#endif
	252
	253	if(fHeaviestParticle<kGenThermVirtGamma)return;
	254	TDatabasePDG::Instance()->AddParticle("ThermVirtGamma","ThermVirtGamma",0,true,0,0,"GaugeBoson",224000);
	255	AliGenParam *genThermVirtG=0;
	256	Char_t nameThermVirtG[10];
	257	snprintf(nameThermVirtG,10,"ThermVirtGamma");
	258	genThermVirtG = new AliGenParam(fNPart*0.5, new AliGenEMlib(), AliGenEMlib::kThermVirtGamma, "DUMMY");
	259	genThermVirtG->SetYRange(fYMin, fYMax);
	260	AddSource2Generator(nameThermVirtG,genThermVirtG);
	261	TF1 *fPtThermVirtG = genThermVirtG->GetPt();
	262	#if ROOT_VERSION_CODE >= ROOT_VERSION(5,99,0)
	263	fYieldArray[kGenThermVirtGamma] = fPtThermVirtG->Integral(fPtMin,fPtMax,1.e-6);
	264	#else
	265	fYieldArray[kGenThermVirtGamma] = fPtThermVirtG->Integral(fPtMin,fPtMax,(Double_t *)0,1.e-6);
	266	#endif
	267	}
268
e40b9538	269	}
	270
	271	//-------------------------------------------------------------------
	272	void AliGenEMCocktail::AddSource2Generator(Char_t* nameSource,
	273	AliGenParam* const genSource)
	274	{
	275	// add sources to the cocktail
	276	Double_t phiMin = fPhiMin*180./TMath::Pi();
	277	Double_t phiMax = fPhiMax*180./TMath::Pi();
	278
	279	genSource->SetPtRange(fPtMin, fPtMax);
e40b9538	280	genSource->SetPhiRange(phiMin, phiMax);
e40b9538	281	genSource->SetWeighting(fWeightingMode);
4ae1c9f0	282	genSource->SetForceGammaConversion(fForceConv);
e40b9538	283	if (!gMC) genSource->SetDecayer(fDecayer);
	284	genSource->Init();
	285
	286	AddGenerator(genSource,nameSource,1.); // Adding Generator
	287	}
	288
	289	//-------------------------------------------------------------------
	290	void AliGenEMCocktail::Init()
	291	{
4ae1c9f0	292	// Initialisation
e40b9538	293	TIter next(fEntries);
	294	AliGenCocktailEntry *entry;
	295	if (fStack) {
	296	while((entry = (AliGenCocktailEntry*)next())) {
	297	entry->Generator()->SetStack(fStack);
	298	}
	299	}
	300	}
	301
	302	//_________________________________________________________________________
	303	void AliGenEMCocktail::Generate()
	304	{
4ae1c9f0	305	// Generate event
e40b9538	306	TIter next(fEntries);
	307	AliGenCocktailEntry *entry = 0;
	308	AliGenCocktailEntry *preventry = 0;
	309	AliGenerator* gen = 0;
	310
	311	if (fHeader) delete fHeader;
	312	fHeader = new AliGenCocktailEventHeader("Electromagnetic Cocktail Header");
	313
	314	const TObjArray *partArray = gAlice->GetMCApp()->Particles();
	315
4ae1c9f0	316	// Generate the vertex position used by all generators
e40b9538	317	if(fVertexSmear == kPerEvent) Vertex();
e40b9538	318
4ae1c9f0	319	//Reseting stack
e40b9538	320	AliRunLoader * runloader = AliRunLoader::Instance();
	321	if (runloader)
	322	if (runloader->Stack())
	323	runloader->Stack()->Clean();
	324
4ae1c9f0	325	// Loop over generators and generate events
e40b9538	326	Int_t igen = 0;
6078e216	327	Float_t evPlane;
	328	Rndm(&evPlane,1);
	329	evPlane=TMath::Pi()2;
e40b9538	330	while((entry = (AliGenCocktailEntry*)next())) {
e40b9538	331	gen = entry->Generator();
e40b9538	332	gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
	333
	334	if (fNPart > 0) {
	335	igen++;
	336	if (igen == 1) entry->SetFirst(0);
	337	else entry->SetFirst((partArray->GetEntriesFast())+1);
6078e216	338	gen->SetEventPlane(evPlane);
e40b9538	339	gen->Generate();
	340	entry->SetLast(partArray->GetEntriesFast());
	341	preventry = entry;
	342	}
	343	}
	344	next.Reset();
	345
4ae1c9f0	346	// Setting weights for proper absolute normalization
e40b9538	347	Int_t iPart, iMother;
	348	Int_t pdgMother = 0;
	349	Double_t weight = 0.;
	350	Double_t dNdy = 0.;
	351	Int_t maxPart = partArray->GetEntriesFast();
	352	for(iPart=0; iPart<maxPart; iPart++){
	353	TParticle *part = gAlice->GetMCApp()->Particle(iPart);
	354	iMother = part->GetFirstMother();
	355	TParticle *mother = 0;
	356	if (iMother>=0){
	357	mother = gAlice->GetMCApp()->Particle(iMother);
	358	pdgMother = mother->GetPdgCode();
	359	}
	360	else
	361	pdgMother = part->GetPdgCode();
71443190	362
e40b9538	363	switch (pdgMother){
	364	case 111:
	365	dNdy = fYieldArray[kGenPizero];
	366	break;
	367	case 221:
	368	dNdy = fYieldArray[kGenEta];
	369	break;
	370	case 113:
	371	dNdy = fYieldArray[kGenRho];
	372	break;
	373	case 223:
	374	dNdy = fYieldArray[kGenOmega];
	375	break;
	376	case 331:
	377	dNdy = fYieldArray[kGenEtaprime];
	378	break;
	379	case 333:
	380	dNdy = fYieldArray[kGenPhi];
	381	break;
4ae1c9f0	382	case 443:
	383	dNdy = fYieldArray[kGenJpsi];
	384	break;
e40b9538	385	default:
	386	dNdy = 0.;
	387	}
71443190	388
	389	switch (pdgMother){
	390	case 221000:
	391	dNdy = fYieldArray[kGenPromptRealGamma];
	392	break;
	393	case 223000:
	394	dNdy = fYieldArray[kGenPromptVirtGamma];
	395	break;
	396	case 222000:
	397	dNdy = fYieldArray[kGenThermRealGamma];
	398	break;
	399	case 224000:
	400	dNdy = fYieldArray[kGenThermVirtGamma];
	401	break;
	402	}
e40b9538	403	weight = dNdy*part->GetWeight();
	404	part->SetWeight(weight);
	405	}
	406
	407	fHeader->SetNProduced(maxPart);
	408
	409
	410	TArrayF eventVertex;
	411	eventVertex.Set(3);
	412	for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
	413
	414	fHeader->SetPrimaryVertex(eventVertex);
	415
	416	gAlice->SetGenEventHeader(fHeader);
	417	}