[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 
// Aug. 07: added trigger cut on total momentum

#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.),
     fMuonPCut(0.),
     fMuonThetaMinCut(0.),
     fMuonThetaMaxCut(180.),
     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()->Clean();
	// 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) &&
	       (part->P()>fMuonPCut)) {
	      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
f81a4aca	27	// Aug. 07: added trigger cut on total momentum
103ac317	28
	29	#include <TObjArray.h>
	30	#include <TParticle.h>
	31	#include <TF1.h>
aaa95f22	32	#include <TVirtualMC.h>
103ac317	33
	34	#include "AliGenCocktailEventHeader.h"
	35
	36	#include "AliGenCocktailEntry.h"
	37	#include "AliGenMUONCocktailpp.h"
	38	#include "AliGenMUONlib.h"
	39	#include "AliGenParam.h"
	40	#include "AliMC.h"
	41	#include "AliRun.h"
	42	#include "AliStack.h"
aaa95f22	43	#include "AliDecayer.h"
103ac317	44	#include "AliLog.h"
103ac317	45	#include "AliGenPythia.h"
b44c3901	46	#include "AliGenCorrHF.h"
103ac317	47
	48	ClassImp(AliGenMUONCocktailpp)
	49
	50	//________________________________________________________________________
	51	AliGenMUONCocktailpp::AliGenMUONCocktailpp()
1c56e311	52	:AliGenCocktail(),
aaa95f22	53	fDecayer(0),
	54	fDecayModeResonance(kAll),
	55	fDecayModePythia(kAll),
1c56e311	56	fTotalRate(0),
	57	fMuonMultiplicity(0),
	58	fMuonPtCut(0.),
f81a4aca	59	fMuonPCut(0.),
18bc0c8e	60	fMuonThetaMinCut(0.),
f81a4aca	61	fMuonThetaMaxCut(180.),
aaa95f22	62	fMuonOriginCut(-999.),
18bc0c8e	63	fNSucceded(0),
1c56e311	64	fNGenerated(0)
103ac317	65	{
103ac317	66	// Constructor
103ac317	67	}
93a2041b	68
103ac317	69	//_________________________________________________________________________
	70	AliGenMUONCocktailpp::~AliGenMUONCocktailpp()
	71	// Destructor
	72	{
	73
	74	}
	75
	76	//_________________________________________________________________________
	77	void AliGenMUONCocktailpp::Init()
	78	{
	79	// MinBias NN cross section @ pp 14 TeV -PR Vol II p:473
	80	Double_t sigmaReaction = 0.070;
	81
	82	// These limits are only used for renormalization of quarkonia cross section
	83	// Pythia events are generated in 4pi
	84	Double_t ptMin = fPtMin;
	85	Double_t ptMax = fPtMax;
	86	Double_t yMin = fYMin;;
	87	Double_t yMax = fYMax;;
	88	Double_t phiMin = fPhiMin*180./TMath::Pi();
	89	Double_t phiMax = fPhiMax*180./TMath::Pi();
	90	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));
	91
	92	// Ratios with respect to the reaction cross-section in the
	93	// kinematics limit of the MUONCocktail
	94	Double_t ratiojpsi;
	95	Double_t ratiopsiP;
	96	Double_t ratioupsilon;
	97	Double_t ratioupsilonP;
	98	Double_t ratioupsilonPP;
b44c3901	99	Double_t ratioccbar;
	100	Double_t ratiobbbar;
	101
18bc0c8e	102	// Cross sections in barns (from PPR Vol. II p: 552) pp - 14 TeV and
18bc0c8e	103	// corrected from feed down of higher resonances
103ac317	104
18bc0c8e	105	Double_t sigmajpsi = 49.44e-6;
103ac317	106	Double_t sigmapsiP = 7.67e-6;
18bc0c8e	107	Double_t sigmaupsilon = 0.989e-6;
18bc0c8e	108	Double_t sigmaupsilonP = 0.502e-6;
103ac317	109	Double_t sigmaupsilonPP = 0.228e-6;
b44c3901	110	Double_t sigmaccbar = 11.2e-3;
b44c3901	111	Double_t sigmabbbar = 0.51e-3;
103ac317	112
aaa95f22	113	AliInfo(Form("the parametrised resonances uses the decay mode %d",fDecayModeResonance));
aaa95f22	114
18bc0c8e	115	// Generation using CDF scaled distribution for pp@14TeV (from D. Stocco)
18bc0c8e	116	//----------------------------------------------------------------------
103ac317	117	// Jpsi generator
18bc0c8e	118	AliGenParam * genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp", "Jpsi");
103ac317	119	// first step: generation in 4pi
	120	genjpsi->SetPtRange(0.,100.);
	121	genjpsi->SetYRange(-8.,8.);
	122	genjpsi->SetPhiRange(0.,360.);
aaa95f22	123	genjpsi->SetForceDecay(fDecayModeResonance);
	124	if (!gMC) genjpsi->SetDecayer(fDecayer);
	125
103ac317	126	genjpsi->Init(); // generation in 4pi
	127	ratiojpsi = sigmajpsi / sigmaReaction * genjpsi->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax); // get weight
	128	AliInfo(Form("jpsi prod. cross-section in pp(14 TeV) %5.3g b",sigmajpsi));
	129	AliInfo(Form("jpsi prod. probability per collision in acceptance %5.3g",ratiojpsi));
	130	// second step: generation in selected kinematical range
	131	genjpsi->SetPtRange(ptMin, ptMax);
	132	genjpsi->SetYRange(yMin, yMax);
	133	genjpsi->SetPhiRange(phiMin, phiMax);
	134	genjpsi->Init(); // generation in selected kinematic range
	135	AddGenerator(genjpsi, "Jpsi", ratiojpsi); // Adding Generator
	136	fTotalRate+=ratiojpsi;
	137
	138	//------------------------------------------------------------------
	139	// Psi prime generator
18bc0c8e	140	AliGenParam * genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp", "PsiP");
103ac317	141	// first step: generation in 4pi
	142	genpsiP->SetPtRange(0.,100.);
	143	genpsiP->SetYRange(-8.,8.);
	144	genpsiP->SetPhiRange(0.,360.);
aaa95f22	145	genpsiP->SetForceDecay(fDecayModeResonance);
	146	if (!gMC) genpsiP->SetDecayer(fDecayer);
	147
103ac317	148	genpsiP->Init(); // generation in 4pi
	149	ratiopsiP = sigmapsiP / sigmaReaction * genpsiP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	150	AliInfo(Form("psiP prod. cross-section in pp(14 TeV) %5.3g b",sigmapsiP));
	151	AliInfo(Form("psiP prod. probability per collision in acceptance %5.3g",ratiopsiP));
	152	// second step: generation in selected kinematical range
	153	genpsiP->SetPtRange(ptMin, ptMax);
	154	genpsiP->SetYRange(yMin, yMax);
	155	genpsiP->SetPhiRange(phiMin, phiMax);
	156	genpsiP->Init(); // generation in selected kinematic range
	157	AddGenerator(genpsiP, "PsiP", ratiopsiP); // Adding Generator
	158	fTotalRate+=ratiopsiP;
	159
	160	//------------------------------------------------------------------
	161	// Upsilon 1S generator
18bc0c8e	162	AliGenParam * genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp", "Upsilon");
103ac317	163	// first step: generation in 4pi
	164	genupsilon->SetPtRange(0.,100.);
	165	genupsilon->SetYRange(-8.,8.);
	166	genupsilon->SetPhiRange(0.,360.);
aaa95f22	167	genupsilon->SetForceDecay(fDecayModeResonance);
aaa95f22	168	if (!gMC) genupsilon->SetDecayer(fDecayer);
103ac317	169	genupsilon->Init(); // generation in 4pi
	170	ratioupsilon = sigmaupsilon / sigmaReaction * genupsilon->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	171	AliInfo(Form("Upsilon 1S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilon));
	172	AliInfo(Form("Upsilon 1S prod. probability per collision in acceptance %5.3g",ratioupsilon));
	173	// second step: generation in selected kinematical range
	174	genupsilon->SetPtRange(ptMin, ptMax);
	175	genupsilon->SetYRange(yMin, yMax);
	176	genupsilon->SetPhiRange(phiMin, phiMax);
	177	genupsilon->Init(); // generation in selected kinematical range
	178	AddGenerator(genupsilon,"Upsilon", ratioupsilon); // Adding Generator
	179	fTotalRate+=ratioupsilon;
	180
	181	//------------------------------------------------------------------
	182	// Upsilon 2S generator
18bc0c8e	183	AliGenParam * genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp", "UpsilonP");
103ac317	184	// first step: generation in 4pi
	185	genupsilonP->SetPtRange(0.,100.);
	186	genupsilonP->SetYRange(-8.,8.);
	187	genupsilonP->SetPhiRange(0.,360.);
aaa95f22	188	genupsilonP->SetForceDecay(fDecayModeResonance);
aaa95f22	189	if (!gMC) genupsilonP->SetDecayer(fDecayer);
103ac317	190	genupsilonP->Init(); // generation in 4pi
	191	ratioupsilonP = sigmaupsilonP / sigmaReaction * genupsilonP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	192	AliInfo(Form("Upsilon 2S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonP));
	193	AliInfo(Form("Upsilon 2S prod. probability per collision in acceptance %5.3g",ratioupsilonP));
	194	// second step: generation in the kinematical range
	195	genupsilonP->SetPtRange(ptMin, ptMax);
	196	genupsilonP->SetYRange(yMin, yMax);
	197	genupsilonP->SetPhiRange(phiMin, phiMax);
	198	genupsilonP->Init(); // generation in selected kinematical range
	199	AddGenerator(genupsilonP,"UpsilonP", ratioupsilonP); // Adding Generator
	200	fTotalRate+=ratioupsilonP;
	201
	202	//------------------------------------------------------------------
	203	// Upsilon 3S generator
18bc0c8e	204	AliGenParam * genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp", "UpsilonPP");
103ac317	205	// first step: generation in 4pi
	206	genupsilonPP->SetPtRange(0.,100.);
	207	genupsilonPP->SetYRange(-8.,8.);
	208	genupsilonPP->SetPhiRange(0.,360.);
aaa95f22	209	genupsilonPP->SetForceDecay(fDecayModeResonance);
aaa95f22	210	if (!gMC) genupsilonPP->SetDecayer(fDecayer);
103ac317	211	genupsilonPP->Init(); // generation in 4pi
	212	ratioupsilonPP = sigmaupsilonPP / sigmaReaction * genupsilonPP->GetRelativeArea(ptMin,ptMax,yMin,yMax,phiMin,phiMax);
	213	AliInfo(Form("Upsilon 3S prod. cross-section in pp(14 TeV) %5.3g b",sigmaupsilonPP));
	214	AliInfo(Form("Upsilon 3S prod. probability per collision in acceptance %5.3g",ratioupsilonPP));
	215	// second step: generation in selected kinematical range
	216	genupsilonPP->SetPtRange(ptMin, ptMax);
	217	genupsilonPP->SetYRange(yMin, yMax);
	218	genupsilonPP->SetPhiRange(phiMin, phiMax);
	219	genupsilonPP->Init(); // generation in selected kinematical range
	220	AddGenerator(genupsilonPP,"UpsilonPP", ratioupsilonPP); // Adding Generator
	221	fTotalRate+=ratioupsilonPP;
b44c3901	222
	223	//------------------------------------------------------------------
	224	// Generator of charm
	225
	226	AliGenCorrHF *gencharm = new AliGenCorrHF(1, 4);
	227	gencharm->SetMomentumRange(0,9999);
	228	gencharm->SetForceDecay(kAll);
	229	ratioccbar = sigmaccbar/sigmaReaction;
	230	gencharm->Init();
	231	AddGenerator(gencharm,"CorrHFCharm",ratioccbar);
	232	fTotalRate+=ratioccbar;
	233
103ac317	234	//------------------------------------------------------------------
b44c3901	235	// Generator of beauty
	236
	237	AliGenCorrHF *genbeauty = new AliGenCorrHF(1, 5);
	238	genbeauty->SetMomentumRange(0,9999);
	239	genbeauty->SetForceDecay(kAll);
	240	ratiobbbar = sigmabbbar/sigmaReaction;
	241	genbeauty->Init();
	242	AddGenerator(genbeauty,"CorrHFBeauty",ratiobbbar);
	243	fTotalRate+=ratiobbbar;
	244
	245	//--------------------------t----------------------------------------
103ac317	246	// Pythia generator
	247	AliGenPythia *pythia = new AliGenPythia(1);
	248	pythia->SetProcess(kPyMbMSEL1);
	249	pythia->SetStrucFunc(kCTEQ5L);
	250	pythia->SetEnergyCMS(14000.);
aaa95f22	251	AliInfo(Form("\n\npythia uses the decay mode %d",fDecayModePythia));
aaa95f22	252	pythia->SetForceDecay(fDecayModePythia);
103ac317	253	pythia->SetPtRange(0.,100.);
	254	pythia->SetYRange(-8.,8.);
	255	pythia->SetPhiRange(0.,360.);
f58d19bb	256	pythia->SetPtHard(2.76,-1.0);
b44c3901	257	pythia->SwitchHFOff();
103ac317	258	pythia->Init();
	259	AddGenerator(pythia,"Pythia",1);
	260	fTotalRate+=1.;
	261
aaa95f22	262	TIter next(fEntries);
	263	AliGenCocktailEntry *entry;
	264	if (fStack) {
	265	while((entry = (AliGenCocktailEntry*)next())) {
	266	entry->Generator()->SetStack(fStack);
	267	}
	268	}
103ac317	269	}
	270
	271	//_________________________________________________________________________
	272	void AliGenMUONCocktailpp::Generate()
	273	{
	274	// Generate event
	275	TIter next(fEntries);
	276	AliGenCocktailEntry *entry = 0;
	277	AliGenCocktailEntry *preventry = 0;
	278	AliGenerator* gen = 0;
	279
	280	TObjArray *partArray = gAlice->GetMCApp()->Particles();
	281
	282	// Generate the vertex position used by all generators
	283	if(fVertexSmear == kPerEvent) Vertex();
	284
	285	// Loop on primordialTrigger:
	286	// minimum muon multiplicity above a pt cut in a theta acceptance region
	287
	288	Bool_t primordialTrigger = kFALSE;
	289	while(!primordialTrigger) {
	290	//Reseting stack
	291	AliRunLoader * runloader = gAlice->GetRunLoader();
	292	if (runloader)
	293	if (runloader->Stack())
34da8494	294	runloader->Stack()->Clean();
103ac317	295	// Loop over generators and generate events
	296	Int_t igen = 0;
	297	Int_t npart = 0;
	298	const char* genName = 0;
	299	while((entry = (AliGenCocktailEntry*)next())) {
	300	gen = entry->Generator();
	301	genName = entry->GetName();
	302	gen->SetVertex(fVertex.At(0), fVertex.At(1), fVertex.At(2));
	303
	304	npart = (strcmp(genName,"Pythia") == 0) ? 1 :
	305	gRandom->Poisson(entry->Rate());
	306
	307	if (npart > 0) {
	308	igen++;
	309	if (igen == 1) entry->SetFirst(0);
	310	else entry->SetFirst((partArray->GetEntriesFast())+1);
	311
	312	gen->SetNumberParticles(npart);
	313	gen->Generate();
	314	entry->SetLast(partArray->GetEntriesFast());
	315	preventry = entry;
	316	}
	317	}
	318	next.Reset();
	319
	320	// Testing primordial trigger: Single muons or dimuons with Pt above a Pt cut
	321	// in the muon spectrometer acceptance
	322	Int_t iPart;
	323	fNGenerated++;
b44c3901	324	Int_t numberOfMuons=0;Int_t maxPart = partArray->GetEntriesFast();
aaa95f22	325	for(iPart=0; iPart<maxPart; iPart++){
103ac317	326
aaa95f22	327	TParticle *part = gAlice->GetMCApp()->Particle(iPart);
	328	if ( TMath::Abs(part->GetPdgCode()) == 13 ){
	329	if((part->Vz() > fMuonOriginCut) && //take only the muons that decayed before the abs + 1 int. length in C abs
	330	(part->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
	331	(part->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
f81a4aca	332	(part->Pt()>fMuonPtCut) &&
f81a4aca	333	(part->P()>fMuonPCut)) {
aaa95f22	334	numberOfMuons++;
103ac317	335	}
aaa95f22	336	}
aaa95f22	337	}
103ac317	338	if (numberOfMuons >= fMuonMultiplicity) primordialTrigger = kTRUE;
	339	}
	340	fNSucceded++;
	341
aaa95f22	342	// AliInfo(Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
103ac317	343	AliDebug(5,Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
	344	}
	345
	346