#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)
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:
fChildSelect[0]=kKPlus;
break;
case kBJpsi:
+ case kBJpsiUndecayed:
fChildSelect[0]= 443;
break;
case kChiToJpsiGammaToMuonMuon:
fChildSelect[0]= 22;
fChildSelect[1]= 11;
break;
-
- case kOmega:
+ 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
Double_t pz = particle->Pz();
- Double_t e = particle->Energy();
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;
//
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);
}
}
+void AliGenMC::BeamCrossAngle()
+{
+ // 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);