/* $Id$ */
//
-// 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
+// Class to create the coktail for physics with muons for pp collisions
+// using the The followoing sources:
+// jpsi, psiP, upsilon, upsilonP, upsilonPP, open charm and open beauty
// 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
+// 2009: added possibility to hide x-sections (B. Vulpescu)
+// 2009: added possibility to have the cocktail (fast generator and param.)
+// for pp @ 10 TeV or pp @ 14 TeV (N. Bastid)
+//-----------------
+// 2009: added polarization (L. Bianchi)
+//------------------
+// 11/2009: added chi_c1 & chi_c2 (P.Crochet & N.Bastid).
+// Cross-sections for charmonia are now directly taken from the Yellow Report
+// (hep-ph/0311048) Tab.9, page 19. See below for details w.r.t. beam energy.
+// usage: see example of Config in $ALICE_ROOT/prod/LHC09a10/Config.C
+//------------------------
+// 04/2010:
+// - CMS energy passed via parameter
+// i.e. gener->SetCMSEnergy(AliGenMUONCocktailpp::kCMS07TeV) in Config.C
+// - resonances now added to the cocktail via AddReso2Generator
+// - cleaning
+// B.Vulpescu & P.Crochet
+
#include <TObjArray.h>
#include <TParticle.h>
#include <TF1.h>
-
+#include <TVirtualMC.h>
#include "AliGenCocktailEventHeader.h"
#include "AliGenCocktailEntry.h"
#include "AliMC.h"
#include "AliRun.h"
#include "AliStack.h"
+#include "AliDecayer.h"
#include "AliLog.h"
-#include "AliGenPythia.h"
-
+#include "AliGenCorrHF.h"
+#include "AliDecayerPolarized.h"
ClassImp(AliGenMUONCocktailpp)
//________________________________________________________________________
AliGenMUONCocktailpp::AliGenMUONCocktailpp()
:AliGenCocktail(),
- fTotalRate(0),
+ fDecayer(0),
+ fDecayModeResonance(kAll),
+ fDecayModePythia(kAll),
fMuonMultiplicity(0),
fMuonPtCut(0.),
+ fMuonPCut(0.),
fMuonThetaMinCut(0.),
- fMuonThetaMaxCut(0.),
+ fMuonThetaMaxCut(180.),
+ fMuonOriginCut(-999.),
fNSucceded(0),
- fNGenerated(0)
+ fNGenerated(0),
+
+ fJpsiPol(0),
+ fChic1Pol(0),
+ fChic2Pol(0),
+ fPsiPPol(0),
+ fUpsPol(0),
+ fUpsPPol(0),
+ fUpsPPPol(0),
+ fPolFrame(0),
+
+ fCMSEnergyTeV(0),
+ fCMSEnergyTeVArray(),
+ fSigmaReaction(0),
+ fSigmaReactionArray(),
+ fSigmaJPsi(0),
+ fSigmaJPsiArray(),
+ fSigmaChic1(0),
+ fSigmaChic1Array(),
+ fSigmaChic2(0),
+ fSigmaChic2Array(),
+ fSigmaPsiP(0),
+ fSigmaPsiPArray(),
+ fSigmaUpsilon(0),
+ fSigmaUpsilonArray(),
+ fSigmaUpsilonP(0),
+ fSigmaUpsilonPArray(),
+ fSigmaUpsilonPP(0),
+ fSigmaUpsilonPPArray(),
+ fSigmaCCbar(0),
+ fSigmaCCbarArray(),
+ fSigmaBBbar(0),
+ fSigmaBBbarArray(),
+
+ fSigmaSilent(kFALSE)
{
// Constructor
+
+// x-sections for pp @ 7 TeV: charmonia from hep-ph/0311048 Tab.9, page 19,
+// bottomnium as for 10 TeV
+ fCMSEnergyTeVArray[0] = 7.00;
+ fSigmaReactionArray[0] = 0.0695;
+ fSigmaJPsiArray[0] = 21.8e-6;
+ fSigmaChic1Array[0] = 21.1e-6;
+ fSigmaChic2Array[0] = 34.9e-6;
+ fSigmaPsiPArray[0] = 4.93e-6;
+ fSigmaUpsilonArray[0] = 0.463e-6;
+ fSigmaUpsilonPArray[0] = 0.154e-6;
+ fSigmaUpsilonPPArray[0] = 0.0886e-6;
+ fSigmaCCbarArray[0] = 6.91e-3;
+ fSigmaBBbarArray[0] = 0.232e-3;
+
+//x-sections for pp @ 10 TeV: charmonia and bottomonia from 14 TeV numbers
+// scaled down according to ccbar and bbar cross-sections
+ fCMSEnergyTeVArray[1] = 10.00;
+ fSigmaReactionArray[1] = 0.0695;
+ fSigmaJPsiArray[1] = 26.06e-6;
+ fSigmaChic1Array[1] = 25.18e-6;
+ fSigmaChic2Array[1] = 41.58e-6;
+ fSigmaPsiPArray[1] = 5.88e-6;
+ fSigmaUpsilonArray[1] = 0.658e-6;
+ fSigmaUpsilonPArray[1] = 0.218e-6;
+ fSigmaUpsilonPPArray[1] = 0.122e-6;
+ fSigmaCCbarArray[1] = 8.9e-3;
+ fSigmaBBbarArray[1] = 0.33e-3;
+
+//x-sections for pp @ 14 TeV: charmonia from hep-ph/0311048 Tab.9, page 19,
+// bottomonium from hep-ph/0311048 Tab.9, page 19 taken inton account that
+// feed-down from chib is included
+ fCMSEnergyTeVArray[2] = 14.00;
+ fSigmaReactionArray[2] = 0.070;
+ fSigmaJPsiArray[2] = 32.9e-6;
+ fSigmaChic1Array[2] = 31.8e-6;
+ fSigmaChic2Array[2] = 52.5e-6;
+ fSigmaPsiPArray[2] = 7.43e-6;
+ fSigmaUpsilonArray[2] = 0.989e-6;
+ fSigmaUpsilonPArray[2] = 0.502e-6;
+ fSigmaUpsilonPPArray[2] = 0.228e-6;
+ fSigmaCCbarArray[2] = 11.2e-3;
+ fSigmaBBbarArray[2] = 0.51e-3;
+
}
+
//_________________________________________________________________________
-AliGenMUONCocktailpp::AliGenMUONCocktailpp(const AliGenMUONCocktailpp & cocktail):
- AliGenCocktail(cocktail),
- fTotalRate(0),
- fMuonMultiplicity(0),
- fMuonPtCut(0.),
- fMuonThetaMinCut(0.),
- fMuonThetaMaxCut(0.),
- fNSucceded(0),
- fNGenerated(0)
+AliGenMUONCocktailpp::~AliGenMUONCocktailpp()
{
-// Copy constructor
- fTotalRate =0;
- fNSucceded=0;
- fNGenerated=0;
- fMuonMultiplicity=0;
- fMuonPtCut=0.;
- fMuonThetaMinCut=0.;
- fMuonThetaMaxCut=0.;
+// Destructor
+
}
+
//_________________________________________________________________________
-AliGenMUONCocktailpp::~AliGenMUONCocktailpp()
-// Destructor
+void AliGenMUONCocktailpp::SetCMSEnergy(CMSEnergyCode cmsEnergy)
{
-
+// setter for CMSEnergy and corresponding cross-sections
+ fCMSEnergyTeV = fCMSEnergyTeVArray[cmsEnergy];
+ fSigmaReaction = fSigmaReactionArray[cmsEnergy];
+ fSigmaJPsi = fSigmaJPsiArray[cmsEnergy];
+ fSigmaChic1 = fSigmaChic1Array[cmsEnergy];
+ fSigmaChic2 = fSigmaChic2Array[cmsEnergy];
+ fSigmaPsiP = fSigmaPsiPArray[cmsEnergy];
+ fSigmaUpsilon = fSigmaUpsilonArray[cmsEnergy];
+ fSigmaUpsilonP = fSigmaUpsilonPArray[cmsEnergy];
+ fSigmaUpsilonPP = fSigmaUpsilonPPArray[cmsEnergy];
+ fSigmaCCbar = fSigmaCCbarArray[cmsEnergy];
+ fSigmaBBbar = fSigmaBBbarArray[cmsEnergy];
}
//_________________________________________________________________________
-void AliGenMUONCocktailpp::Init()
+void AliGenMUONCocktailpp::SetResPolarization(Double_t JpsiPol, Double_t PsiPPol, Double_t UpsPol,
+ Double_t UpsPPol, Double_t UpsPPPol, char *PolFrame){
+// setter for resonances polarization
+ if (strcmp(PolFrame,"kColSop")==0){
+ fJpsiPol = (JpsiPol>=-1 && JpsiPol<=1) ? JpsiPol : 0;
+ fPsiPPol = (PsiPPol>=-1 && PsiPPol<=1) ? PsiPPol : 0;
+ fUpsPol = (UpsPol>=-1 && UpsPol<=1) ? UpsPol : 0;
+ fUpsPPol = (UpsPPol>=-1 && UpsPPol<=1) ? UpsPPol : 0;
+ fUpsPPPol = (UpsPPPol>=-1 && UpsPPPol<=1) ? UpsPPPol : 0;
+ fPolFrame = 0;
+ } else if (strcmp(PolFrame,"kHelicity")==0){
+ fJpsiPol = (JpsiPol>=-1 && JpsiPol<=1) ? JpsiPol : 0;
+ fPsiPPol = (PsiPPol>=-1 && PsiPPol<=1) ? PsiPPol : 0;
+ fUpsPol = (UpsPol>=-1 && UpsPol<=1) ? UpsPol : 0;
+ fUpsPPol = (UpsPPol>=-1 && UpsPPol<=1) ? UpsPPol : 0;
+ fUpsPPPol = (UpsPPPol>=-1 && UpsPPPol<=1) ? UpsPPPol : 0;
+ fPolFrame = 1;
+
+ } else {
+ AliInfo(Form("The polarization frame is not valid"));
+ AliInfo(Form("No polarization will be set"));
+ fJpsiPol=0.;
+ fPsiPPol=0.;
+ fUpsPol=0.;
+ fUpsPPol=0.;
+ fUpsPPPol=0.;
+ }
+}
+
+//_________________________________________________________________________
+void AliGenMUONCocktailpp::CreateCocktail()
{
-// MinBias NN cross section @ pp 14 TeV -PR Vol II p:473
- Double_t sigmaReaction = 0.070;
-
+// create and add resonances and open HF to the coctail
+ Int_t cmsEnergy = Int_t(fCMSEnergyTeV);
+
// These limits are only used for renormalization of quarkonia cross section
// Pythia events are generated in 4pi
Double_t ptMin = fPtMin;
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;
-
// 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;
-
-// 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(kAll);
- 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(kAll);
- 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(kAll);
- 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;
+ Double_t sigmajpsi = fSigmaJPsi;
+ Double_t sigmachic1 = fSigmaChic1;
+ Double_t sigmachic2 = fSigmaChic2;
+ Double_t sigmapsiP = fSigmaPsiP;
+ Double_t sigmaupsilon = fSigmaUpsilon;
+ Double_t sigmaupsilonP = fSigmaUpsilonP;
+ Double_t sigmaupsilonPP = fSigmaUpsilonPP;
+ Double_t sigmaccbar = fSigmaCCbar;
+ Double_t sigmabbbar = fSigmaBBbar;
+
+// Cross sections corrected with the BR in mu+mu-
+// (only in case of use of AliDecayerPolarized)
+
+ if(TMath::Abs(fJpsiPol) > 1.e-30) {sigmajpsi = fSigmaJPsi*0.0593;}
+ if(TMath::Abs(fChic1Pol) > 1.e-30) {sigmachic1 = fSigmaChic1*0.;} // tb consistent
+ if(TMath::Abs(fChic2Pol) > 1.e-30) {sigmachic2 = fSigmaChic2*0.;} // tb consistent
+ if(TMath::Abs(fPsiPPol) > 1.e-30) {sigmapsiP = fSigmaPsiP*0.0075;}
+ if(TMath::Abs(fUpsPol) > 1.e-30) {sigmaupsilon = fSigmaUpsilon*0.0248;}
+ if(TMath::Abs(fUpsPPol) > 1.e-30) {sigmaupsilonP = fSigmaUpsilonP*0.0193;}
+ if(TMath::Abs(fUpsPPPol) > 1.e-30) {sigmaupsilonPP = fSigmaUpsilonPP*0.0218;}
+
+ AliInfo(Form("the parametrised resonances uses the decay mode %d",fDecayModeResonance));
+
+// Create and add resonances to the generator
+ AliGenParam * genjpsi=0;
+ AliGenParam * genchic1=0;
+ AliGenParam * genchic2=0;
+ AliGenParam * genpsiP=0;
+ AliGenParam * genupsilon=0;
+ AliGenParam * genupsilonP=0;
+ AliGenParam * genupsilonPP=0;
+ Char_t nameJpsi[10];
+ Char_t nameChic1[10];
+ Char_t nameChic2[10];
+ Char_t namePsiP[10];
+ Char_t nameUps[10];
+ Char_t nameUpsP[10];
+ Char_t nameUpsPP[10];
+
+ sprintf(nameJpsi,"Jpsi");
+ sprintf(nameChic1,"Chic1");
+ sprintf(nameChic2,"Chic2");
+ sprintf(namePsiP,"PsiP");
+ sprintf(nameUps,"Ups");
+ sprintf(nameUpsP,"UpsP");
+ sprintf(nameUpsPP,"UpsPP");
+
+ if(cmsEnergy == 10){
+ genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp 10", "Jpsi");
+ genchic1 = new AliGenParam(1, AliGenMUONlib::kChic1, "CDF pp 10", "Chic1");
+ genchic2 = new AliGenParam(1, AliGenMUONlib::kChic2, "CDF pp 10", "Chic2");
+ genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp 10", "PsiP");
+ genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp 10", "Upsilon");
+
+ genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp 10", "UpsilonP");
+ genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp 10", "UpsilonPP");
+ } else if (cmsEnergy == 7){
+ genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp 7", "Jpsi");
+ genchic1 = new AliGenParam(1, AliGenMUONlib::kChic1, "CDF pp 7", "Chic1");
+ genchic2 = new AliGenParam(1, AliGenMUONlib::kChic2, "CDF pp 7", "Chic2");
+ genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp 7", "PsiP");
+
+ genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp 7", "Upsilon");
+ genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp 7", "UpsilonP");
+ genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp 7", "UpsilonPP");
+ } else if (cmsEnergy == 14){
+ genjpsi = new AliGenParam(1, AliGenMUONlib::kJpsi, "CDF pp ", "Jpsi");
+ genchic1 = new AliGenParam(1, AliGenMUONlib::kChic1, "CDF pp ", "Chic1");
+ genchic2 = new AliGenParam(1, AliGenMUONlib::kChic2, "CDF pp ", "Chic2");
+ genpsiP = new AliGenParam(1, AliGenMUONlib::kPsiP, "CDF pp", "PsiP");
+
+ genupsilon = new AliGenParam(1, AliGenMUONlib::kUpsilon, "CDF pp", "Upsilon");
+ genupsilonP = new AliGenParam(1, AliGenMUONlib::kUpsilonP, "CDF pp", "UpsilonP");
+
+ genupsilonPP = new AliGenParam(1, AliGenMUONlib::kUpsilonPP, "CDF pp", "UpsilonPP");
+ }
+
+ AddReso2Generator(nameJpsi,genjpsi,sigmajpsi,fJpsiPol);
+ AddReso2Generator(nameChic1,genchic2,sigmachic1,fChic2Pol);
+ AddReso2Generator(nameChic2,genpsiP,sigmapsiP,fPsiPPol);
+ AddReso2Generator(namePsiP,genchic1,sigmachic1,fChic1Pol);
+ AddReso2Generator(nameUps,genupsilon,sigmaupsilon,fUpsPol);
+ AddReso2Generator(nameUpsP,genupsilonP,sigmaupsilonP,fUpsPPol);
+ AddReso2Generator(nameUpsPP,genupsilonPP,sigmaupsilonPP,fUpsPPPol);
+
//------------------------------------------------------------------
-// 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(kAll);
- 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;
-
+// Generator of charm
+ AliGenCorrHF *gencharm = new AliGenCorrHF(1, 4, cmsEnergy);
+ gencharm->SetMomentumRange(0,9999);
+ gencharm->SetForceDecay(kAll);
+ Double_t ratioccbar = sigmaccbar/fSigmaReaction;
+ if (!gMC) gencharm->SetDecayer(fDecayer);
+ gencharm->Init();
+ if (!fSigmaSilent) {
+ AliInfo(Form("c-cbar prod. cross-section in pp %5.3g b",sigmaccbar));
+ AliInfo(Form("c-cbar prod. probability per collision in acceptance %5.3g",ratioccbar));
+ }
+ AddGenerator(gencharm,"CorrHFCharm",ratioccbar);
//------------------------------------------------------------------
-// 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(kAll);
- 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));
+// Generator of beauty
+ AliGenCorrHF *genbeauty = new AliGenCorrHF(1, 5, cmsEnergy);
+ genbeauty->SetMomentumRange(0,9999);
+ genbeauty->SetForceDecay(kAll);
+ Double_t ratiobbbar = sigmabbbar/fSigmaReaction;
+ if (!gMC) genbeauty->SetDecayer(fDecayer);
+ genbeauty->Init();
+ if (!fSigmaSilent) {
+ AliInfo(Form("b-bbar prod. cross-section in pp %5.3g b",sigmabbbar));
+ AliInfo(Form("b-bbar prod. probability per collision in acceptance %5.3g",ratiobbbar));
+ }
+ AddGenerator(genbeauty,"CorrHFBeauty",ratiobbbar);
+
+//-------------------------------------------------------------------
+// Pythia generator
+//
+// This has to go into the Config.C
+//
+// AliGenPythia *pythia = new AliGenPythia(1);
+// pythia->SetProcess(kPyMbMSEL1);
+// pythia->SetStrucFunc(kCTEQ5L);
+// pythia->SetEnergyCMS(14000.);
+// AliInfo(Form("\n\npythia uses the decay mode %d", GetDecayModePythia()));
+// Decay_t dt = gener->GetDecayModePythia();
+// pythia->SetForceDecay(dt);
+// 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);
+
+}
+
+//-------------------------------------------------------------------
+void AliGenMUONCocktailpp::AddReso2Generator(Char_t* nameReso,
+ AliGenParam* const genReso,
+ Double_t sigmaReso,
+ Double_t polReso)
+{
+// add resonances to the cocktail
+ Double_t phiMin = fPhiMin*180./TMath::Pi();
+ Double_t phiMax = fPhiMax*180./TMath::Pi();
+
+ // first step: generation in 4pi
+ genReso->SetPtRange(0.,100.);
+ genReso->SetYRange(-8.,8.);
+ genReso->SetPhiRange(0.,360.);
+ genReso->SetForceDecay(fDecayModeResonance);
+ if (!gMC) genReso->SetDecayer(fDecayer);
+ genReso->Init(); // generation in 4pi
+// Ratios with respect to the reaction cross-section in the
+// kinematics limit of the MUONCocktail
+ Double_t ratioReso = sigmaReso / fSigmaReaction * genReso->GetRelativeArea(fPtMin,fPtMax,fYMin,fYMax,phiMin,phiMax);
+ if (!fSigmaSilent) {
+ AliInfo(Form("%s prod. cross-section in pp %5.3g b",nameReso,sigmaReso));
+ AliInfo(Form("%s prod. probability per collision in acceptance %5.3g",nameReso,ratioReso));
+ }
// 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;
+ genReso->SetPtRange(fPtMin, fPtMax);
+ genReso->SetYRange(fYMin, fYMax);
+ genReso->SetPhiRange(phiMin, phiMax);
+ genReso->Init(); // generation in selected kinematical range
+
+ TVirtualMCDecayer *decReso = 0;
+ if(TMath::Abs(polReso) > 1.e-30){
+ AliInfo(Form("******Setting polarized decayer for %s''",nameReso));
+ if(fPolFrame==0) {
+ decReso = new AliDecayerPolarized(polReso,AliDecayerPolarized::kColSop,AliDecayerPolarized::kMuon);
+ AliInfo(Form("******Reference frame: %s, alpha: %f","Collins-Soper",polReso));
+ }
+ if(fPolFrame==1) {
+ decReso = new AliDecayerPolarized(polReso,AliDecayerPolarized::kHelicity,AliDecayerPolarized::kMuon);
+ AliInfo(Form("******Reference frame: %s, alpha: %f","Helicity",polReso));
+ }
+ decReso->SetForceDecay(kAll);
+ decReso->Init();
+ genReso->SetDecayer(decReso);
+ }
-//------------------------------------------------------------------
-// Pythia generator
- AliGenPythia *pythia = new AliGenPythia(1);
- pythia->SetProcess(kPyMbMSEL1);
- pythia->SetStrucFunc(kCTEQ5L);
- pythia->SetEnergyCMS(14000.);
- pythia->SetForceDecay(kAll);
- pythia->SetPtRange(0.,100.);
- pythia->SetYRange(-8.,8.);
- pythia->SetPhiRange(0.,360.);
- pythia->SetPtHard(2.76,-1.0);
- pythia->Init();
- AddGenerator(pythia,"Pythia",1);
- fTotalRate+=1.;
+ AddGenerator(genReso,nameReso,ratioReso); // Adding Generator
+}
+//-------------------------------------------------------------------
+void AliGenMUONCocktailpp::Init()
+{
+ // Initialisation
+ TIter next(fEntries);
+ AliGenCocktailEntry *entry;
+ if (fStack) {
+ while((entry = (AliGenCocktailEntry*)next())) {
+ entry->Generator()->SetStack(fStack);
+ }
+ }
}
//_________________________________________________________________________
AliGenCocktailEntry *preventry = 0;
AliGenerator* gen = 0;
- TObjArray *partArray = gAlice->GetMCApp()->Particles();
+ if (fHeader) delete fHeader;
+ fHeader = new AliGenCocktailEventHeader("MUON Cocktail Header");
+
+ const TObjArray *partArray = gAlice->GetMCApp()->Particles();
// Generate the vertex position used by all generators
if(fVertexSmear == kPerEvent) Vertex();
Bool_t primordialTrigger = kFALSE;
while(!primordialTrigger) {
//Reseting stack
- AliRunLoader * runloader = gAlice->GetRunLoader();
+ AliRunLoader * runloader = AliRunLoader::Instance();
if (runloader)
if (runloader->Stack())
- runloader->Stack()->Reset();
+ runloader->Stack()->Clean();
// Loop over generators and generate events
Int_t igen = 0;
Int_t npart = 0;
}
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;
-
- for(iPart=0; iPart<partArray->GetEntriesFast(); iPart++){
+ Int_t numberOfMuons=0;Int_t maxPart = partArray->GetEntriesFast();
+ for(iPart=0; iPart<maxPart; iPart++){
- if ( (TMath::Abs(gAlice->GetMCApp()->Particle(iPart)->GetPdgCode())==13) &&
- (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()>fMuonThetaMinCut) &&
- (gAlice->GetMCApp()->Particle(iPart)->Theta()*180./TMath::Pi()<fMuonThetaMaxCut) &&
- (gAlice->GetMCApp()->Particle(iPart)->Pt()>fMuonPtCut) ) {
-
- numberOfMuons++;
+ 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;
+ fHeader->SetNProduced(maxPart);
}
-
- if (numberOfMuons >= fMuonMultiplicity) primordialTrigger = kTRUE;
+
}
fNSucceded++;
- AliInfo(Form("Generated Events are %d and Succeeded Events are %d",fNGenerated,fNSucceded));
+ TArrayF eventVertex;
+ eventVertex.Set(3);
+ for (Int_t j=0; j < 3; j++) eventVertex[j] = fVertex[j];
+
+ fHeader->SetPrimaryVertex(eventVertex);
+
+ gAlice->SetGenEventHeader(fHeader);
+
+// 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));
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff