* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.17 2003/04/30 14:48:21 hristov
-Changes related to the initialization of random numbers generators. Now one can use its own randoms for each module, particle generator, and/or tracking package. The interface with Fortran is simplified and some inter-library dependencies are avoided. Future improvements are welcome...
-
-Revision 1.16 2003/04/08 10:22:05 morsch
-Rapidity shift calculated in Init().
-
-Revision 1.15 2003/04/04 08:13:26 morsch
-Boost method added.
-
-Revision 1.14 2003/01/14 10:50:19 alibrary
-Cleanup of STEER coding conventions
-
-Revision 1.13 2002/10/14 14:55:35 hristov
-Merging the VirtualMC branch to the main development branch (HEAD)
-
-Revision 1.5.4.2 2002/07/24 08:56:28 alibrary
-Updating EVGEN on TVirtulaMC
-
-Revision 1.12 2002/07/19 11:42:33 morsch
-Use CalcMass()
-
-Revision 1.11 2002/06/06 15:26:24 morsch
-Correct child-selection for kPhiKK
-
-Revision 1.10 2002/06/05 14:05:46 morsch
-Decayer option kPhiKK for forced phi->K+K- decay added.
-
-Revision 1.9 2002/05/30 14:58:29 morsch
-Add pointer to AliGeometry to handle geometrical acceptance. (G. MArtinez)
-
-Revision 1.8 2002/04/26 10:42:35 morsch
-Case kNoDecayHeavy added. (N. Carrer)
-
-Revision 1.7 2002/04/17 10:32:32 morsch
-Coding Rule violations corrected.
-
-Revision 1.6 2002/03/26 14:19:36 morsch
-Saver calculation of rapdity.
-
-Revision 1.5 2002/03/12 17:02:20 morsch
-Change in calculation of rapidity, include case in which numerically e == pz.
-
-Revision 1.4 2001/11/27 13:13:07 morsch
-Maximum lifetime for long-lived particles to be put on the stack is parameter.
-It can be set via SetMaximumLifetime(..).
-
-Revision 1.3 2001/10/16 08:48:56 morsch
-Common vertex related code moved to base class AliGenerator.
-
-Revision 1.2 2001/10/15 08:15:51 morsch
-Event vertex and vertex truncation setting moved into AliMC.
-
-Revision 1.1 2001/07/13 10:56:00 morsch
-AliGenMC base class for AliGenParam and AliGenPythia commonalities.
-
-*/
+/* $Id$ */
// Base class for generators using external MC generators.
// For example AliGenPythia using Pythia.
// decay products and particle selection.
// andreas.morsch@cern.ch
+#include <TClonesArray.h>
#include <TMath.h>
#include <TPDGCode.h>
#include <TParticle.h>
+#include <TLorentzVector.h>
+#include <TVector3.h>
#include "AliGenMC.h"
+#include "AliGenEventHeader.h"
+#include "AliRun.h"
+#include "AliGeometry.h"
+#include "AliDecayer.h"
- ClassImp(AliGenMC)
+ClassImp(AliGenMC)
AliGenMC::AliGenMC()
- :AliGenerator()
+ :AliGenerator(),
+ fParticles("TParticle", 1000),
+ fParentSelect(8),
+ fChildSelect(8),
+ fCutOnChild(0),
+ fChildPtMin(0.),
+ fChildPtMax(1.e10),
+ fChildPMin(0.),
+ fChildPMax(1.e10),
+ fChildPhiMin(0.),
+ fChildPhiMax(2. * TMath::Pi()),
+ fChildThetaMin(0.),
+ fChildThetaMax(TMath::Pi()),
+ fChildYMin(-12.),
+ fChildYMax(12.),
+ fXingAngleX(0.),
+ fXingAngleY(0.),
+ fForceDecay(kAll),
+ fMaxLifeTime(1.e-15),
+ fDyBoost(0.),
+ fGeometryAcceptance(0),
+ fPdgCodeParticleforAcceptanceCut(0),
+ fNumberOfAcceptedParticles(0),
+ fNprimaries(0)
{
// Default Constructor
- SetCutOnChild();
- SetChildMomentumRange();
- SetChildPtRange();
- SetChildPhiRange();
- SetChildThetaRange();
- SetChildYRange();
- SetMaximumLifetime();
- SetGeometryAcceptance();
- SetPdgCodeParticleforAcceptanceCut();
- SetNumberOfAcceptedParticles();
- SetTarget();
- SetProjectile();
+ fAProjectile = 1;
+ fZProjectile = 1;
+ fATarget = 1;
+ fZTarget = 1;
+ fProjectile = "P";
+ fTarget = "P";
}
AliGenMC::AliGenMC(Int_t npart)
- :AliGenerator(npart)
+ :AliGenerator(npart),
+ fParticles("TParticle", 1000),
+ fParentSelect(8),
+ fChildSelect(8),
+ fCutOnChild(0),
+ fChildPtMin(0.),
+ fChildPtMax(1.e10),
+ fChildPMin(0.),
+ fChildPMax(1.e10),
+ fChildPhiMin(0.),
+ fChildPhiMax(2. * TMath::Pi()),
+ fChildThetaMin(0.),
+ fChildThetaMax(TMath::Pi()),
+ fChildYMin(-12.),
+ fChildYMax(12.),
+ fXingAngleX(0.),
+ fXingAngleY(0.),
+ fForceDecay(kAll),
+ fMaxLifeTime(1.e-15),
+ fDyBoost(0.),
+ fGeometryAcceptance(0),
+ fPdgCodeParticleforAcceptanceCut(0),
+ fNumberOfAcceptedParticles(0),
+ fNprimaries(0)
{
// Constructor
- SetCutOnChild();
- SetChildMomentumRange();
- SetChildPtRange();
- SetChildPhiRange();
- SetChildThetaRange();
- SetChildYRange();
//
- fParentSelect.Set(8);
- fChildSelect.Set(8);
- for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
- SetMaximumLifetime();
- SetGeometryAcceptance();
- SetPdgCodeParticleforAcceptanceCut();
- SetNumberOfAcceptedParticles();
- SetTarget();
- SetProjectile();
-}
-
-AliGenMC::AliGenMC(const AliGenMC & mc)
-{
-// copy constructor
+ fAProjectile = 1;
+ fZProjectile = 1;
+ fATarget = 1;
+ fZTarget = 1;
+ fProjectile = "P";
+ fTarget = "P";
+ for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0;
}
AliGenMC::~AliGenMC()
//
// Initialization
switch (fForceDecay) {
+ case kBSemiElectronic:
case kSemiElectronic:
case kDiElectron:
case kBJpsiDiElectron:
case kBPsiPrimeDiElectron:
+ case kElectronEM:
+ case kDiElectronEM:
fChildSelect[0] = kElectron;
break;
+ case kHardMuons:
+ case kBSemiMuonic:
+ case kDSemiMuonic:
case kSemiMuonic:
case kDiMuon:
+ case kJpsiDiMuon:
case kBJpsiDiMuon:
case kBPsiPrimeDiMuon:
case kPiToMu:
case kKaToMu:
+ case kWToMuon:
+ case kWToCharmToMuon:
+ case kZDiMuon:
+ case kZDiElectron:
fChildSelect[0]=kMuonMinus;
break;
+ case kWToCharm:
+ break;
case kHadronicD:
+ case kHadronicDWithout4Bodies:
+ case kHadronicDWithV0:
+ case kHadronicDWithout4BodiesWithV0:
fChildSelect[0]=kPiPlus;
fChildSelect[1]=kKPlus;
break;
case kPhiKK:
fChildSelect[0]=kKPlus;
- case kOmega:
+ break;
+ case kBJpsi:
+ case kBJpsiUndecayed:
+ fChildSelect[0]= 443;
+ break;
+ case kChiToJpsiGammaToMuonMuon:
+ fChildSelect[0]= 22;
+ fChildSelect[1]= 13;
+ break;
+ case kChiToJpsiGammaToElectronElectron:
+ fChildSelect[0]= 22;
+ fChildSelect[1]= 11;
+ break;
+ case kLambda:
+ fChildSelect[0]= kProton;
+ fChildSelect[1]= 211;
+ break;
+ case kPsiPrimeJpsiDiElectron:
+ fChildSelect[0]= 211;
+ fChildSelect[1]= 11;
+ break;
+ case kGammaEM:
+ fChildSelect[0] = kGamma;
+ break;
+ case kOmega:
case kAll:
+ case kAllMuonic:
case kNoDecay:
case kNoDecayHeavy:
+ case kNoDecayBeauty:
+ case kNeutralPion:
+ case kBeautyUpgrade:
break;
}
return kFALSE;
}
-Bool_t AliGenMC::KinematicSelection(TParticle *particle, Int_t flag) const
+Bool_t AliGenMC::KinematicSelection(const TParticle *particle, Int_t flag) const
{
// Perform kinematic selection
- Float_t pz = particle->Pz();
- Float_t e = particle->Energy();
- Float_t pt = particle->Pt();
- Float_t p = particle->P();
- Float_t theta = particle->Theta();
- Float_t mass = particle->GetCalcMass();
- Float_t mt2 = pt * pt + mass * mass;
- Float_t phi = particle->Phi();
+ Double_t pz = particle->Pz();
+ Double_t pt = particle->Pt();
+ Double_t p = particle->P();
+ Double_t theta = particle->Theta();
+ Double_t mass = particle->GetCalcMass();
+ Double_t mt2 = pt * pt + mass * mass;
+ Double_t phi = particle->Phi();
+ Double_t e = particle->Energy();
+
+ if (e == 0.)
+ e = TMath::Sqrt(p * p + mass * mass);
+
Double_t y, y0;
Bool_t AliGenMC::CheckAcceptanceGeometry(Int_t np, TClonesArray* particles)
{
- Bool_t Check ; // All fPdgCodeParticleforAcceptanceCut particles are in in the fGeometryAcceptance acceptance
- Int_t NumberOfPdgCodeParticleforAcceptanceCut=0;
- Int_t NumberOfAcceptedPdgCodeParticleforAcceptanceCut=0;
+// Check the geometrical acceptance for particle.
+
+ Bool_t check ;
+ Int_t numberOfPdgCodeParticleforAcceptanceCut = 0;
+ Int_t numberOfAcceptedPdgCodeParticleforAcceptanceCut = 0;
TParticle * particle;
Int_t i;
- for (i=0; i<np; i++) {
+ for (i = 0; i < np; i++) {
particle = (TParticle *) particles->At(i);
if( TMath::Abs( particle->GetPdgCode() ) == TMath::Abs( fPdgCodeParticleforAcceptanceCut ) ) {
- NumberOfPdgCodeParticleforAcceptanceCut++;
- if (fGeometryAcceptance->Impact(particle)) NumberOfAcceptedPdgCodeParticleforAcceptanceCut++;
+ numberOfPdgCodeParticleforAcceptanceCut++;
+ if (fGeometryAcceptance->Impact(particle)) numberOfAcceptedPdgCodeParticleforAcceptanceCut++;
}
}
- if ( NumberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
- Check = kTRUE;
+ if ( numberOfAcceptedPdgCodeParticleforAcceptanceCut > (fNumberOfAcceptedParticles-1) )
+ check = kTRUE;
else
- Check = kFALSE;
+ check = kFALSE;
- return Check;
+ return check;
}
Int_t AliGenMC::CheckPDGCode(Int_t pdgcode) const
//
Double_t beta = TMath::TanH(fDyBoost);
- Double_t gamma = 1./TMath::Sqrt(1.-beta*beta);
+ Double_t gamma = 1./TMath::Sqrt((1.-beta)*(1.+beta));
Double_t gb = gamma * beta;
// printf("\n Boosting particles to lab frame %f %f %f", fDyBoost, beta, gamma);
Int_t i;
- Int_t np = fParticles->GetEntriesFast();
+ Int_t np = fParticles.GetEntriesFast();
for (i = 0; i < np; i++)
{
- TParticle* iparticle = (TParticle*) fParticles->At(i);
+ TParticle* iparticle = (TParticle*) fParticles.At(i);
Double_t e = iparticle->Energy();
Double_t px = iparticle->Px();
}
}
-
-
-AliGenMC& AliGenMC::operator=(const AliGenMC& rhs)
+void AliGenMC::BeamCrossAngle()
{
-// Assignment operator
- return *this;
+ // Applies a boost in the y-direction in order to take into account the
+ // beam crossing angle
+
+ Double_t thetaPr0, pyPr2, pzPr2;
+ TVector3 beta;
+
+ thetaPr0 = fXingAngleY / 2.;
+
+ // Momentum of the CMS system
+ pyPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Sin(thetaPr0);
+ pzPr2 = TMath::Sqrt(fEnergyCMS * fEnergyCMS/ 4 - 0.938 * 0.938) * TMath::Cos(thetaPr0);
+
+ TLorentzVector proj1Vect, proj2Vect, projVect;
+ proj1Vect.SetPxPyPzE(0., pyPr2, pzPr2, fEnergyCMS/2);
+ proj2Vect.SetPxPyPzE(0., pyPr2,-pzPr2, fEnergyCMS/2);
+ projVect = proj1Vect + proj2Vect;
+ beta=(1. / projVect.E()) * (projVect.Vect());
+
+ Int_t i;
+ Int_t np = fParticles.GetEntriesFast();
+ for (i = 0; i < np; i++)
+ {
+ TParticle* iparticle = (TParticle*) fParticles.At(i);
+
+ Double_t e = iparticle->Energy();
+ Double_t px = iparticle->Px();
+ Double_t py = iparticle->Py();
+ Double_t pz = iparticle->Pz();
+
+ TLorentzVector partIn;
+ partIn.SetPxPyPzE(px,py,pz,e);
+ partIn.Boost(beta);
+ iparticle->SetMomentum(partIn.Px(),partIn.Py(),partIn.Pz(),partIn.E());
+ }
}
+
+void AliGenMC::AddHeader(AliGenEventHeader* header)
+{
+ // Passes header either to the container or to gAlice
+ if (fContainer) {
+ header->SetName(fName);
+ fContainer->AddHeader(header);
+ } else {
+ gAlice->SetGenEventHeader(header);
+ }
+}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff