X-Git-Url: http://git.uio.no/git/?p=u%2Fmrichter%2FAliRoot.git;a=blobdiff_plain;f=EVGEN%2FAliGenMC.cxx;h=accdcb5d4a1456196b8fcdf84c061e52e2defda4;hp=479496d42e1e24949cc21b43326914359b054bed;hb=7ff022be8a29d4dc327796cb5a30569316047b2d;hpb=847af60441957c8ca4af8d330e6c4d304bfb4d10 diff --git a/EVGEN/AliGenMC.cxx b/EVGEN/AliGenMC.cxx index 479496d42e1..accdcb5d4a1 100644 --- a/EVGEN/AliGenMC.cxx +++ b/EVGEN/AliGenMC.cxx @@ -25,15 +25,20 @@ #include #include #include +#include +#include #include "AliGenMC.h" +#include "AliGenEventHeader.h" +#include "AliRun.h" #include "AliGeometry.h" +#include "AliDecayer.h" ClassImp(AliGenMC) AliGenMC::AliGenMC() :AliGenerator(), - fParticles(0), + fParticles("TParticle", 1000), fParentSelect(8), fChildSelect(8), fCutOnChild(0), @@ -51,23 +56,24 @@ AliGenMC::AliGenMC() fXingAngleY(0.), fForceDecay(kAll), fMaxLifeTime(1.e-15), - fAProjectile(1), - fZProjectile(1), - fATarget(1), - fZTarget(1), - fProjectile("P"), - fTarget("P"), fDyBoost(0.), fGeometryAcceptance(0), fPdgCodeParticleforAcceptanceCut(0), - fNumberOfAcceptedParticles(2) + fNumberOfAcceptedParticles(0), + fNprimaries(0) { // Default Constructor + fAProjectile = 1; + fZProjectile = 1; + fATarget = 1; + fZTarget = 1; + fProjectile = "P"; + fTarget = "P"; } AliGenMC::AliGenMC(Int_t npart) :AliGenerator(npart), - fParticles(0), + fParticles("TParticle", 1000), fParentSelect(8), fChildSelect(8), fCutOnChild(0), @@ -85,20 +91,21 @@ AliGenMC::AliGenMC(Int_t npart) fXingAngleY(0.), fForceDecay(kAll), fMaxLifeTime(1.e-15), - fAProjectile(1), - fZProjectile(1), - fATarget(1), - fZTarget(1), - fProjectile("P"), - fTarget("P"), fDyBoost(0.), fGeometryAcceptance(0), fPdgCodeParticleforAcceptanceCut(0), - fNumberOfAcceptedParticles(2) + fNumberOfAcceptedParticles(0), + fNprimaries(0) { // Constructor // - for (Int_t i=0; i<8; i++) fParentSelect[i]=fChildSelect[i]=0; + 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() @@ -116,12 +123,16 @@ void AliGenMC::Init() 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: @@ -129,11 +140,15 @@ void AliGenMC::Init() 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; @@ -141,13 +156,36 @@ void AliGenMC::Init() fChildSelect[0]=kKPlus; break; case kBJpsi: - fChildSelect[0]=443; + case kBJpsiUndecayed: + fChildSelect[0]= 443; break; - case kOmega: + 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; } @@ -179,17 +217,21 @@ Bool_t AliGenMC::ChildSelected(Int_t ip) const 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; @@ -346,16 +388,16 @@ void AliGenMC::Boost() // 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(); @@ -368,3 +410,53 @@ void AliGenMC::Boost() iparticle->SetMomentum(px, py, pzb, eb); } } + +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); + } +}