#include <TMath.h>
#include <TPDGCode.h>
#include <TParticle.h>
+#include <TLorentzVector.h>
+#include <TVector3.h>
#include "AliGenMC.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:
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:
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();
}
}
+void AliGenMC::BeamCrossAngle()
+{
+ // Applies a boost in the y-direction in order to take into account the
+ // beam crossing angle
+
+ Double_t thetaPr0, phiPr0, pyPr2, pzPr2;
+ TVector3 beta;
+
+ thetaPr0 = fXingAngleY / 2.;
+ phiPr0 = 0;
+
+ // 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