[u/mrichter/AliRoot.git] / EVGEN / AliGenMUONCocktailpp.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.                  *
 **************************************************************************/

/* $Id$ */

//
// Classe to create the coktail for physics with muons for pp at 14 TeV
// The followoing sources: 
// jpsi,psiP, upsilon, upsilonP, upsilonPP are added to Pythia
// The free parameeters are :
//      pp reaction cross-section
//      production cross-sections in pp collisions 
// July 07:added heavy quark production from AliGenCorrHF and heavy quark 
//         production switched off in Pythia 

#include <TObjArray.h>
#include <TParticle.h>
#include <TF1.h>
#include <TVirtualMC.h>

#include "AliGenCocktailEventHeader.h"

#include "AliGenCocktailEntry.h"
#include "AliGenMUONCocktailpp.h"
#include "AliGenMUONlib.h"
#include "AliGenParam.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliStack.h"
#include "AliDecayer.h"
#include "AliLog.h"
#include "AliGenPythia.h"
#include "AliGenCorrHF.h"

ClassImp(AliGenMUONCocktailpp)  
  
//________________________________________________________________________
AliGenMUONCocktailpp::AliGenMUONCocktailpp()
    :AliGenCocktail(),
     fDecayer(0),
     fDecayModeResonance(kAll),
     fDecayModePythia(kAll),
     fTotalRate(0),
     fMuonMultiplicity(0),
     fMuonPtCut(0.),
     fMuonThetaMinCut(0.),
     fMuonThetaMaxCut(0.),
     fMuonOriginCut(-999.),
     fNSucceded(0),
     fNGenerated(0)
{
// Constructor
}

//_________________________________________________________________________
AliGenMUONCocktailpp::~AliGenMUONCocktailpp()
// Destructor
{
    
}

//_________________________________________________________________________
void AliGenMUONCocktailpp::Init()
{
// MinBias NN cross section @ pp 14 TeV -PR  Vol II p:473
    Double_t sigmaReaction =   0.070; 
    
// These limits are only used for renormalization of quarkonia cross section
// Pythia events are generated in 4pi  
    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));
    
// Ratios with respect to the reaction cross-section in the 
// kinematics limit of the MUONCocktail
    Double_t ratiojpsi;
    Double_t ratiopsiP;
    Double_t ratioupsilon;
    Double_t ratioupsilonP;
    Double_t ratioupsilonPP;
    Double_t ratioccbar;
    Double_t ratiobbbar;

// Cross sections in barns (from PPR Vol. II p: 552) pp - 14 TeV and 
// corrected from feed down of higher resonances 

    Double_t sigmajpsi = 49.44e-6;  
    Double_t sigmapsiP = 7.67e-6;  
    Double_t sigmaupsilon = 0.989e-6;  
    Double_t sigmaupsilonP = 0.502e-6;  
    Double_t sigmaupsilonPP = 0.228e-6;
    Double_t sigmaccbar = 11.2e-3;
    Double_t sigmabbbar = 0.51e-3;
    
    AliInfo(Form("the parametrised resonances uses the decay mode %d",fDecayModeResonance));

// Generation using CDF scaled distribution for pp@14TeV (from D. Stocco)
//----------------------------------------------------------------------
// Jpsi generator
    AliGenParam * genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp", "Jpsi");
// first step: generation in 4pi
    genjpsi->SetPtRange(0.,100.);
    genjpsi->SetYRange(-8.,8.);
    genjpsi->SetPhiRange(0.,360.);
    genjpsi->SetForceDecay(fDecayModeResonance);
    if (!gMC) genjpsi->SetDecayer(fDecayer);

    genjpsi->Init();  // generation in 4pi
    ratiojpsi = sigmajpsi / sigmaReaction * genjpsi->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax); // get weight
    AliInfo(Form("jpsi prod. cross-section in pp(14 TeV) %5.3g b",sigmajpsi));
    AliInfo(Form("jpsi prod. probability per collision in acceptance %5.3g",ratiojpsi));
// second step: generation in selected kinematical range
    genjpsi->SetPtRange(ptMin, ptMax);  
    genjpsi->SetYRange(yMin, yMax);
    genjpsi->SetPhiRange(phiMin, phiMax);
    genjpsi->Init(); // generation in selected kinematic range
    AddGenerator(genjpsi, "Jpsi", ratiojpsi); // Adding Generator
    fTotalRate+=ratiojpsi;
    
//------------------------------------------------------------------
// Psi prime generator
    AliGenParam * genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp", "PsiP");
// first step: generation in 4pi
    genpsiP->SetPtRange(0.,100.);
    genpsiP->SetYRange(-8.,8.);
    genpsiP->SetPhiRange(0.,360.);
    genpsiP->SetForceDecay(fDecayModeResonance);
    if (!gMC) genpsiP->SetDecayer(fDecayer);

    genpsiP->Init();  // generation in 4pi
    ratiopsiP = sigmapsiP / sigmaReaction * genpsiP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
    AliInfo(Form("psiP prod. cross-section in pp(14 TeV) %5.3g b",sigmapsiP));
    AliInfo(Form("psiP prod. probability per collision in acceptance %5.3g",ratiopsiP));
// second step: generation in selected kinematical range
    genpsiP->SetPtRange(ptMin, ptMax);  
    genpsiP->SetYRange(yMin, yMax);
    genpsiP->SetPhiRange(phiMin, phiMax);
    genpsiP->Init(); // generation in selected kinematic range
    AddGenerator(genpsiP, "PsiP", ratiopsiP); // Adding Generator
    fTotalRate+=ratiopsiP;
    
//------------------------------------------------------------------
// Upsilon 1S generator
    AliGenParam * genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp", "Upsilon");
// first step: generation in 4pi
    genupsilon->SetPtRange(0.,100.); 
    genupsilon->SetYRange(-8.,8.);
    genupsilon->SetPhiRange(0.,360.);
    genupsilon->SetForceDecay(fDecayModeResonance);
    if (!gMC) genupsilon->SetDecayer(fDecayer);
    genupsilon->Init();  // generation in 4pi
    ratioupsilon = sigmaupsilon / sigmaReaction * genupsilon->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
    AliInfo(Form("Upsilon 1S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilon));
    AliInfo(Form("Upsilon 1S prod. probability per collision in acceptance %5.3g",ratioupsilon));
// second step: generation in selected kinematical range
    genupsilon->SetPtRange(ptMin, ptMax);  
    genupsilon->SetYRange(yMin, yMax);
    genupsilon->SetPhiRange(phiMin, phiMax);
    genupsilon->Init(); // generation in selected kinematical range
    AddGenerator(genupsilon,"Upsilon", ratioupsilon); // Adding Generator
    fTotalRate+=ratioupsilon;
    
//------------------------------------------------------------------
// Upsilon 2S generator
    AliGenParam * genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp", "UpsilonP");
// first step: generation in 4pi
    genupsilonP->SetPtRange(0.,100.);
    genupsilonP->SetYRange(-8.,8.);
    genupsilonP->SetPhiRange(0.,360.);
    genupsilonP->SetForceDecay(fDecayModeResonance);
    if (!gMC) genupsilonP->SetDecayer(fDecayer);  
    genupsilonP->Init();  // generation in 4pi
    ratioupsilonP = sigmaupsilonP / sigmaReaction * genupsilonP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
    AliInfo(Form("Upsilon 2S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonP));
    AliInfo(Form("Upsilon 2S prod. probability per collision in acceptance %5.3g",ratioupsilonP));
// second step: generation in the kinematical range
    genupsilonP->SetPtRange(ptMin, ptMax);  
    genupsilonP->SetYRange(yMin, yMax);
    genupsilonP->SetPhiRange(phiMin, phiMax);
    genupsilonP->Init(); // generation in selected kinematical range
    AddGenerator(genupsilonP,"UpsilonP", ratioupsilonP); // Adding Generator
    fTotalRate+=ratioupsilonP;
    
//------------------------------------------------------------------
// Upsilon 3S generator
    AliGenParam * genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp", "UpsilonPP");
// first step: generation in 4pi
    genupsilonPP->SetPtRange(0.,100.); 
    genupsilonPP->SetYRange(-8.,8.);
    genupsilonPP->SetPhiRange(0.,360.);
    genupsilonPP->SetForceDecay(fDecayModeResonance);
    if (!gMC) genupsilonPP->SetDecayer(fDecayer);  
    genupsilonPP->Init();  // generation in 4pi
    ratioupsilonPP = sigmaupsilonPP / sigmaReaction * genupsilonPP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
    AliInfo(Form("Upsilon 3S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonPP));
    AliInfo(Form("Upsilon 3S prod. probability per collision in acceptance %5.3g",ratioupsilonPP));
// second step: generation in selected kinematical range
    genupsilonPP->SetPtRange(ptMin, ptMax);  
    genupsilonPP->SetYRange(yMin, yMax);
    genupsilonPP->SetPhiRange(phiMin, phiMax);
    genupsilonPP->Init(); // generation in selected kinematical range
    AddGenerator(genupsilonPP,"UpsilonPP", ratioupsilonPP); // Adding Generator
    fTotalRate+=ratioupsilonPP;

//------------------------------------------------------------------
// Generator of charm
    
    AliGenCorrHF *gencharm = new AliGenCorrHF(1, 4);  
          gencharm->SetMomentumRange(0,9999);
          gencharm->SetForceDecay(kAll);
	  ratioccbar = sigmaccbar/sigmaReaction;
          gencharm->Init();
          AddGenerator(gencharm,"CorrHFCharm",ratioccbar);
	  fTotalRate+=ratioccbar;

//------------------------------------------------------------------
// Generator of beauty

	  AliGenCorrHF *genbeauty = new AliGenCorrHF(1, 5);  
          genbeauty->SetMomentumRange(0,9999);
          genbeauty->SetForceDecay(kAll);
	  ratiobbbar = sigmabbbar/sigmaReaction;
	  genbeauty->Init();
          AddGenerator(genbeauty,"CorrHFBeauty",ratiobbbar); 
	  fTotalRate+=ratiobbbar;

//--------------------------t----------------------------------------
// Pythia generator
    AliGenPythia *pythia = new AliGenPythia(1);
    pythia->SetProcess(kPyMbMSEL1);
    pythia->SetStrucFunc(kCTEQ5L);
    pythia->SetEnergyCMS(14000.);
    AliInfo(Form("\n\npythia uses the decay mode %d",fDecayModePythia));
    pythia->SetForceDecay(fDecayModePythia);
    pythia->SetPtRange(0.,100.);
    pythia->SetYRange(-8.,8.);
    pythia->SetPhiRange(0.,360.);
    pythia->SetPtHard(2.76,-1.0);
    pythia->SwitchHFOff();
    pythia->Init(); 
    AddGenerator(pythia,"Pythia",1);
    fTotalRate+=1.;

    TIter next(fEntries);
    AliGenCocktailEntry *entry;
    if (fStack) {
	while((entry = (AliGenCocktailEntry*)next())) {
	    entry->Generator()->SetStack(fStack);
	}
    }
}

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

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

// Loop on primordialTrigger: 
// minimum muon multiplicity above a pt cut in a theta acceptance region

    Bool_t primordialTrigger = kFALSE;
    while(!primordialTrigger) {
	//Reseting stack
	AliRunLoader * runloader = gAlice->GetRunLoader();
	if (runloader)
	    if (runloader->Stack())
		runloader->Stack()->Reset();
	// Loop over generators and generate events
	Int_t igen = 0;
	Int_t npart = 0;	
	const char* genName = 0;
	while((entry = (AliGenCocktailEntry*)next())) {
	    gen = entry->Generator();
	    genName = entry->GetName();
	    gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));

	    npart = (strcmp(genName,"Pythia") == 0) ? 1 :
		gRandom->Poisson(entry->Rate());

	    if (npart > 0) {
		igen++;	
		if (igen == 1) entry->SetFirst(0);		
		else  entry->SetFirst((partArray->GetEntriesFast())+1);
		
		gen->SetNumberParticles(npart);		
		gen->Generate();
		entry->SetLast(partArray->GetEntriesFast());
		preventry = entry;
	    }
	}  
	next.Reset();

// Testing primordial trigger: Single muons or dimuons with Pt above a Pt cut 
// in the muon spectrometer acceptance
	Int_t iPart;
	fNGenerated++;
	Int_t numberOfMuons=0;Int_t maxPart = partArray->GetEntriesFast();
	for(iPart=0; iPart<maxPart; iPart++){      
	    
	  TParticle *part = gAlice->GetMCApp()->Particle(iPart);
	  if ( TMath::Abs(part->GetPdgCode()) == 13 ){  
	    if((part->Vz() > fMuonOriginCut) && //take only the muons that decayed before the abs + 1 int. length in C abs
	       (part->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
	       (part->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
	       (part->Pt()>fMuonPtCut)) {
	      numberOfMuons++;
	    }
	  }
	}	
	if (numberOfMuons >= fMuonMultiplicity) primordialTrigger = kTRUE;
    }
    fNSucceded++;

//     AliInfo(Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
    AliDebug(5,Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
}
Commit	Line	Data
103ac317	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	/* $Id$ */
	17
	18	//
	19	// Classe to create the coktail for physics with muons for pp at 14 TeV
	20	// The followoing sources:
	21	// jpsi,psiP, upsilon, upsilonP, upsilonPP are added to Pythia
	22	// The free parameeters are :
	23	// pp reaction cross-section
	24	// production cross-sections in pp collisions
b44c3901	25	// July 07:added heavy quark production from AliGenCorrHF and heavy quark
b44c3901	26	// production switched off in Pythia
103ac317	27
	28	#include <TObjArray.h>
	29	#include <TParticle.h>
	30	#include <TF1.h>
aaa95f22	31	#include <TVirtualMC.h>
103ac317	32
	33	#include "AliGenCocktailEventHeader.h"
	34
	35	#include "AliGenCocktailEntry.h"
	36	#include "AliGenMUONCocktailpp.h"
	37	#include "AliGenMUONlib.h"
	38	#include "AliGenParam.h"
	39	#include "AliMC.h"
	40	#include "AliRun.h"
	41	#include "AliStack.h"
aaa95f22	42	#include "AliDecayer.h"
103ac317	43	#include "AliLog.h"
103ac317	44	#include "AliGenPythia.h"
b44c3901	45	#include "AliGenCorrHF.h"
103ac317	46
	47	ClassImp(AliGenMUONCocktailpp)
	48
	49	//________________________________________________________________________
	50	AliGenMUONCocktailpp::AliGenMUONCocktailpp()
1c56e311	51	:AliGenCocktail(),
aaa95f22	52	fDecayer(0),
	53	fDecayModeResonance(kAll),
	54	fDecayModePythia(kAll),
1c56e311	55	fTotalRate(0),
	56	fMuonMultiplicity(0),
	57	fMuonPtCut(0.),
18bc0c8e	58	fMuonThetaMinCut(0.),
1c56e311	59	fMuonThetaMaxCut(0.),
aaa95f22	60	fMuonOriginCut(-999.),
18bc0c8e	61	fNSucceded(0),
1c56e311	62	fNGenerated(0)
103ac317	63	{
103ac317	64	// Constructor
103ac317	65	}
93a2041b	66
103ac317	67	//_________________________________________________________________________
	68	AliGenMUONCocktailpp::~AliGenMUONCocktailpp()
	69	// Destructor
	70	{
	71
	72	}
	73
	74	//_________________________________________________________________________
	75	void AliGenMUONCocktailpp::Init()
	76	{
	77	// MinBias NN cross section @ pp 14 TeV -PR Vol II p:473
	78	Double_t sigmaReaction = 0.070;
	79
	80	// These limits are only used for renormalization of quarkonia cross section
	81	// Pythia events are generated in 4pi
	82	Double_t ptMin = fPtMin;
	83	Double_t ptMax = fPtMax;
	84	Double_t yMin = fYMin;;
	85	Double_t yMax = fYMax;;
	86	Double_t phiMin = fPhiMin*180./TMath::Pi();
	87	Double_t phiMax = fPhiMax*180./TMath::Pi();
	88	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));
	89
	90	// Ratios with respect to the reaction cross-section in the
	91	// kinematics limit of the MUONCocktail
	92	Double_t ratiojpsi;
	93	Double_t ratiopsiP;
	94	Double_t ratioupsilon;
	95	Double_t ratioupsilonP;
	96	Double_t ratioupsilonPP;
b44c3901	97	Double_t ratioccbar;
	98	Double_t ratiobbbar;
	99
18bc0c8e	100	// Cross sections in barns (from PPR Vol. II p: 552) pp - 14 TeV and
18bc0c8e	101	// corrected from feed down of higher resonances
103ac317	102
18bc0c8e	103	Double_t sigmajpsi = 49.44e-6;
103ac317	104	Double_t sigmapsiP = 7.67e-6;
18bc0c8e	105	Double_t sigmaupsilon = 0.989e-6;
18bc0c8e	106	Double_t sigmaupsilonP = 0.502e-6;
103ac317	107	Double_t sigmaupsilonPP = 0.228e-6;
b44c3901	108	Double_t sigmaccbar = 11.2e-3;
b44c3901	109	Double_t sigmabbbar = 0.51e-3;
103ac317	110
aaa95f22	111	AliInfo(Form("the parametrised resonances uses the decay mode %d",fDecayModeResonance));
aaa95f22	112
18bc0c8e	113	// Generation using CDF scaled distribution for pp@14TeV (from D. Stocco)
18bc0c8e	114	//----------------------------------------------------------------------
103ac317	115	// Jpsi generator
18bc0c8e	116	AliGenParam * genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp", "Jpsi");
103ac317	117	// first step: generation in 4pi
	118	genjpsi->SetPtRange(0.,100.);
	119	genjpsi->SetYRange(-8.,8.);
	120	genjpsi->SetPhiRange(0.,360.);
aaa95f22	121	genjpsi->SetForceDecay(fDecayModeResonance);
	122	if (!gMC) genjpsi->SetDecayer(fDecayer);
	123
103ac317	124	genjpsi->Init(); // generation in 4pi
	125	ratiojpsi = sigmajpsi / sigmaReaction * genjpsi->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax); // get weight
	126	AliInfo(Form("jpsi prod. cross-section in pp(14 TeV) %5.3g b",sigmajpsi));
	127	AliInfo(Form("jpsi prod. probability per collision in acceptance %5.3g",ratiojpsi));
	128	// second step: generation in selected kinematical range
	129	genjpsi->SetPtRange(ptMin, ptMax);
	130	genjpsi->SetYRange(yMin, yMax);
	131	genjpsi->SetPhiRange(phiMin, phiMax);
	132	genjpsi->Init(); // generation in selected kinematic range
	133	AddGenerator(genjpsi, "Jpsi", ratiojpsi); // Adding Generator
	134	fTotalRate+=ratiojpsi;
	135
	136	//------------------------------------------------------------------
	137	// Psi prime generator
18bc0c8e	138	AliGenParam * genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp", "PsiP");
103ac317	139	// first step: generation in 4pi
	140	genpsiP->SetPtRange(0.,100.);
	141	genpsiP->SetYRange(-8.,8.);
	142	genpsiP->SetPhiRange(0.,360.);
aaa95f22	143	genpsiP->SetForceDecay(fDecayModeResonance);
	144	if (!gMC) genpsiP->SetDecayer(fDecayer);
	145
103ac317	146	genpsiP->Init(); // generation in 4pi
	147	ratiopsiP = sigmapsiP / sigmaReaction * genpsiP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	148	AliInfo(Form("psiP prod. cross-section in pp(14 TeV) %5.3g b",sigmapsiP));
	149	AliInfo(Form("psiP prod. probability per collision in acceptance %5.3g",ratiopsiP));
	150	// second step: generation in selected kinematical range
	151	genpsiP->SetPtRange(ptMin, ptMax);
	152	genpsiP->SetYRange(yMin, yMax);
	153	genpsiP->SetPhiRange(phiMin, phiMax);
	154	genpsiP->Init(); // generation in selected kinematic range
	155	AddGenerator(genpsiP, "PsiP", ratiopsiP); // Adding Generator
	156	fTotalRate+=ratiopsiP;
	157
	158	//------------------------------------------------------------------
	159	// Upsilon 1S generator
18bc0c8e	160	AliGenParam * genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp", "Upsilon");
103ac317	161	// first step: generation in 4pi
	162	genupsilon->SetPtRange(0.,100.);
	163	genupsilon->SetYRange(-8.,8.);
	164	genupsilon->SetPhiRange(0.,360.);
aaa95f22	165	genupsilon->SetForceDecay(fDecayModeResonance);
aaa95f22	166	if (!gMC) genupsilon->SetDecayer(fDecayer);
103ac317	167	genupsilon->Init(); // generation in 4pi
	168	ratioupsilon = sigmaupsilon / sigmaReaction * genupsilon->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	169	AliInfo(Form("Upsilon 1S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilon));
	170	AliInfo(Form("Upsilon 1S prod. probability per collision in acceptance %5.3g",ratioupsilon));
	171	// second step: generation in selected kinematical range
	172	genupsilon->SetPtRange(ptMin, ptMax);
	173	genupsilon->SetYRange(yMin, yMax);
	174	genupsilon->SetPhiRange(phiMin, phiMax);
	175	genupsilon->Init(); // generation in selected kinematical range
	176	AddGenerator(genupsilon,"Upsilon", ratioupsilon); // Adding Generator
	177	fTotalRate+=ratioupsilon;
	178
	179	//------------------------------------------------------------------
	180	// Upsilon 2S generator
18bc0c8e	181	AliGenParam * genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp", "UpsilonP");
103ac317	182	// first step: generation in 4pi
	183	genupsilonP->SetPtRange(0.,100.);
	184	genupsilonP->SetYRange(-8.,8.);
	185	genupsilonP->SetPhiRange(0.,360.);
aaa95f22	186	genupsilonP->SetForceDecay(fDecayModeResonance);
aaa95f22	187	if (!gMC) genupsilonP->SetDecayer(fDecayer);
103ac317	188	genupsilonP->Init(); // generation in 4pi
	189	ratioupsilonP = sigmaupsilonP / sigmaReaction * genupsilonP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	190	AliInfo(Form("Upsilon 2S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonP));
	191	AliInfo(Form("Upsilon 2S prod. probability per collision in acceptance %5.3g",ratioupsilonP));
	192	// second step: generation in the kinematical range
	193	genupsilonP->SetPtRange(ptMin, ptMax);
	194	genupsilonP->SetYRange(yMin, yMax);
	195	genupsilonP->SetPhiRange(phiMin, phiMax);
	196	genupsilonP->Init(); // generation in selected kinematical range
	197	AddGenerator(genupsilonP,"UpsilonP", ratioupsilonP); // Adding Generator
	198	fTotalRate+=ratioupsilonP;
	199
	200	//------------------------------------------------------------------
	201	// Upsilon 3S generator
18bc0c8e	202	AliGenParam * genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp", "UpsilonPP");
103ac317	203	// first step: generation in 4pi
	204	genupsilonPP->SetPtRange(0.,100.);
	205	genupsilonPP->SetYRange(-8.,8.);
	206	genupsilonPP->SetPhiRange(0.,360.);
aaa95f22	207	genupsilonPP->SetForceDecay(fDecayModeResonance);
aaa95f22	208	if (!gMC) genupsilonPP->SetDecayer(fDecayer);
103ac317	209	genupsilonPP->Init(); // generation in 4pi
	210	ratioupsilonPP = sigmaupsilonPP / sigmaReaction * genupsilonPP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	211	AliInfo(Form("Upsilon 3S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonPP));
	212	AliInfo(Form("Upsilon 3S prod. probability per collision in acceptance %5.3g",ratioupsilonPP));
	213	// second step: generation in selected kinematical range
	214	genupsilonPP->SetPtRange(ptMin, ptMax);
	215	genupsilonPP->SetYRange(yMin, yMax);
	216	genupsilonPP->SetPhiRange(phiMin, phiMax);
	217	genupsilonPP->Init(); // generation in selected kinematical range
	218	AddGenerator(genupsilonPP,"UpsilonPP", ratioupsilonPP); // Adding Generator
	219	fTotalRate+=ratioupsilonPP;
b44c3901	220
	221	//------------------------------------------------------------------
	222	// Generator of charm
	223
	224	AliGenCorrHF *gencharm = new AliGenCorrHF(1, 4);
	225	gencharm->SetMomentumRange(0,9999);
	226	gencharm->SetForceDecay(kAll);
	227	ratioccbar = sigmaccbar/sigmaReaction;
	228	gencharm->Init();
	229	AddGenerator(gencharm,"CorrHFCharm",ratioccbar);
	230	fTotalRate+=ratioccbar;
	231
103ac317	232	//------------------------------------------------------------------
b44c3901	233	// Generator of beauty
	234
	235	AliGenCorrHF *genbeauty = new AliGenCorrHF(1, 5);
	236	genbeauty->SetMomentumRange(0,9999);
	237	genbeauty->SetForceDecay(kAll);
	238	ratiobbbar = sigmabbbar/sigmaReaction;
	239	genbeauty->Init();
	240	AddGenerator(genbeauty,"CorrHFBeauty",ratiobbbar);
	241	fTotalRate+=ratiobbbar;
	242
	243	//--------------------------t----------------------------------------
103ac317	244	// Pythia generator
	245	AliGenPythia *pythia = new AliGenPythia(1);
	246	pythia->SetProcess(kPyMbMSEL1);
	247	pythia->SetStrucFunc(kCTEQ5L);
	248	pythia->SetEnergyCMS(14000.);
aaa95f22	249	AliInfo(Form("\n\npythia uses the decay mode %d",fDecayModePythia));
aaa95f22	250	pythia->SetForceDecay(fDecayModePythia);
103ac317	251	pythia->SetPtRange(0.,100.);
	252	pythia->SetYRange(-8.,8.);
	253	pythia->SetPhiRange(0.,360.);
f58d19bb	254	pythia->SetPtHard(2.76,-1.0);
b44c3901	255	pythia->SwitchHFOff();
103ac317	256	pythia->Init();
	257	AddGenerator(pythia,"Pythia",1);
	258	fTotalRate+=1.;
	259
aaa95f22	260	TIter next(fEntries);
	261	AliGenCocktailEntry *entry;
	262	if (fStack) {
	263	while((entry = (AliGenCocktailEntry*)next())) {
	264	entry->Generator()->SetStack(fStack);
	265	}
	266	}
103ac317	267	}
	268
	269	//_________________________________________________________________________
	270	void AliGenMUONCocktailpp::Generate()
	271	{
	272	// Generate event
	273	TIter next(fEntries);
	274	AliGenCocktailEntry *entry = 0;
	275	AliGenCocktailEntry *preventry = 0;
	276	AliGenerator* gen = 0;
	277
	278	TObjArray *partArray = gAlice->GetMCApp()->Particles();
	279
	280	// Generate the vertex position used by all generators
	281	if(fVertexSmear == kPerEvent) Vertex();
	282
	283	// Loop on primordialTrigger:
	284	// minimum muon multiplicity above a pt cut in a theta acceptance region
	285
	286	Bool_t primordialTrigger = kFALSE;
	287	while(!primordialTrigger) {
	288	//Reseting stack
	289	AliRunLoader * runloader = gAlice->GetRunLoader();
	290	if (runloader)
	291	if (runloader->Stack())
	292	runloader->Stack()->Reset();
	293	// Loop over generators and generate events
	294	Int_t igen = 0;
	295	Int_t npart = 0;
	296	const char* genName = 0;
	297	while((entry = (AliGenCocktailEntry*)next())) {
	298	gen = entry->Generator();
	299	genName = entry->GetName();
	300	gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
	301
	302	npart = (strcmp(genName,"Pythia") == 0) ? 1 :
	303	gRandom->Poisson(entry->Rate());
	304
	305	if (npart > 0) {
	306	igen++;
	307	if (igen == 1) entry->SetFirst(0);
	308	else entry->SetFirst((partArray->GetEntriesFast())+1);
	309
	310	gen->SetNumberParticles(npart);
	311	gen->Generate();
	312	entry->SetLast(partArray->GetEntriesFast());
	313	preventry = entry;
	314	}
	315	}
	316	next.Reset();
	317
	318	// Testing primordial trigger: Single muons or dimuons with Pt above a Pt cut
	319	// in the muon spectrometer acceptance
	320	Int_t iPart;
	321	fNGenerated++;
b44c3901	322	Int_t numberOfMuons=0;Int_t maxPart = partArray->GetEntriesFast();
aaa95f22	323	for(iPart=0; iPart<maxPart; iPart++){
103ac317	324
aaa95f22	325	TParticle *part = gAlice->GetMCApp()->Particle(iPart);
	326	if ( TMath::Abs(part->GetPdgCode()) == 13 ){
	327	if((part->Vz() > fMuonOriginCut) && //take only the muons that decayed before the abs + 1 int. length in C abs
	328	(part->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
	329	(part->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
	330	(part->Pt()>fMuonPtCut)) {
	331	numberOfMuons++;
103ac317	332	}
aaa95f22	333	}
aaa95f22	334	}
103ac317	335	if (numberOfMuons >= fMuonMultiplicity) primordialTrigger = kTRUE;
	336	}
	337	fNSucceded++;
	338
aaa95f22	339	// AliInfo(Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
103ac317	340	AliDebug(5,Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
	341	}
	342
	343