/*
$Log$
+Revision 1.40 2002/02/12 11:05:53 morsch
+Get daughter indices right.
+
+Revision 1.39 2002/02/12 09:16:39 morsch
+Correction in SelectFlavor()
+
+Revision 1.38 2002/02/12 08:53:21 morsch
+SetNoGammas can be used to inhibit writing of gammas and pi0.
+
+Revision 1.37 2002/02/08 16:50:50 morsch
+Add name and title in constructor.
+
+Revision 1.36 2002/01/31 20:17:55 morsch
+Allow for triggered jets with simplified topology: Exact pT, back-to-back
+
+Revision 1.35 2001/12/13 07:56:25 hristov
+Set pointers to zero in the default constructor
+
+Revision 1.34 2001/12/11 16:55:42 morsch
+Correct initialization for jet phi-range.
+
+Revision 1.33 2001/12/05 10:18:51 morsch
+Possibility of kinematic biasing of jet phi range. (J. Klay)
+
+Revision 1.32 2001/11/28 13:51:11 morsch
+Introduce kinematic biasing (etamin, etamax) of jet trigger. Bookkeeping
+(number of trials) done in AliGenHijingEventHeader.
+
+Revision 1.31 2001/11/06 12:30:34 morsch
+Add Boost() method to boost all particles to LHC lab frame. Needed for asymmetric collision systems.
+
+Revision 1.30 2001/10/21 18:35:56 hristov
+Several pointers were set to zero in the default constructors to avoid memory management problems
+
+Revision 1.29 2001/10/15 08:12:24 morsch
+- Vertex smearing with truncated gaussian.
+- Store triggered jet info before and after final state radiation into mc-heade
+
+Revision 1.28 2001/10/08 11:55:25 morsch
+Store 4-momenta of trigegred jets in event header.
+Possibility to switch of initial and final state radiation.
+
Revision 1.27 2001/10/08 07:13:14 morsch
Add setter for minimum transverse momentum of triggered jet.
:AliGenMC()
{
// Constructor
+ fHijing = 0;
+ fDsigmaDb = 0;
+ fDnDb = 0;
}
AliGenHijing::AliGenHijing(Int_t npart)
{
// Default PbPb collisions at 5. 5 TeV
//
+ fName = "Hijing";
+ fTitle= "Particle Generator using HIJING";
+
SetEnergyCMS();
SetImpactParameterRange();
SetTarget();
SetProjectile();
+ SetBoostLHC();
+ SetJetEtaRange();
+ SetJetPhiRange();
+
fKeep = 0;
fQuench = 1;
fShadowing = 1;
fDnDb = 0;
fPtMinJet = -2.5;
fRadiation = 1;
+ fEventVertex.Set(3);
+//
+ SetSimpleJets();
+ SetNoGammas();
+
//
// Set random number generator
sRandom = fRandom;
+ fHijing = 0;
+
}
AliGenHijing::AliGenHijing(const AliGenHijing & Hijing)
fHijing=(THijing*) fgMCEvGen;
fHijing->SetIHPR2(2, fRadiation);
fHijing->SetIHPR2(3, fTrigger);
- fHijing->SetIHPR2(4, fQuench);
fHijing->SetIHPR2(6, fShadowing);
fHijing->SetIHPR2(12, fDecaysOff);
fHijing->SetIHPR2(21, fKeep);
fHijing->SetHIPR1(10, fPtMinJet);
- fHijing->Initialize();
-
+ fHijing->SetHIPR1(50, fSimpleJet);
+//
+// Quenching
+//
+//
+// fQuench = 0: no quenching
+// fQuench = 1: hijing default
+// fQuench = 2: new LHC parameters for HIPR1(11) and HIPR1(14)
+// fQuench = 3: new RHIC parameters for HIPR1(11) and HIPR1(14)
+// fQuench = 4: new LHC parameters with log(e) dependence
+// fQuench = 5: new RHIC parameters with log(e) dependence
+ fHijing->SetIHPR2(50, 0);
+ if (fQuench > 0)
+ fHijing->SetIHPR2(4, 1);
+ else
+ fHijing->SetIHPR2(4, 0);
+// New LHC parameters from Xin-Nian Wang
+ if (fQuench == 2) {
+ fHijing->SetHIPR1(14, 1.1);
+ fHijing->SetHIPR1(11, 3.7);
+ } else if (fQuench == 3) {
+ fHijing->SetHIPR1(14, 0.20);
+ fHijing->SetHIPR1(11, 2.5);
+ } else if (fQuench == 4) {
+ fHijing->SetIHPR2(50, 1);
+ fHijing->SetHIPR1(14, 4.*0.34);
+ fHijing->SetHIPR1(11, 3.7);
+ } else if (fQuench == 5) {
+ fHijing->SetIHPR2(50, 1);
+ fHijing->SetHIPR1(14, 0.34);
+ fHijing->SetHIPR1(11, 2.5);
+ }
+
+
+//
+// Initialize Hijing
+//
+ fHijing->Initialize();
//
if (fEvaluate) EvaluateCrossSections();
//
fTrials = 0;
for (j = 0;j < 3; j++) origin0[j] = fOrigin[j];
if(fVertexSmear == kPerEvent) {
- Rndm(random,6);
- for (j=0; j < 3; j++) {
- origin0[j] += fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
- TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
- }
+ Float_t dv[3];
+ dv[2] = 1.e10;
+ while(TMath::Abs(dv[2]) > fCutVertexZ*fOsigma[2]) {
+ Rndm(random,6);
+ for (j=0; j < 3; j++) {
+ dv[j] = fOsigma[j]*TMath::Cos(2*random[2*j]*TMath::Pi())*
+ TMath::Sqrt(-2*TMath::Log(random[2*j+1]));
+ }
+ }
+ for (j=0; j < 3; j++) origin0[j] += dv[j];
} else if (fVertexSmear == kPerTrack) {
// fHijing->SetMSTP(151,0);
for (j = 0; j < 3; j++) {
// --------------------------------------------------------------------------
fHijing->GenerateEvent();
fTrials++;
+ if (fTrigger != kNoTrigger) {
+ if (!CheckTrigger()) continue;
+ }
+
fHijing->ImportParticles(particles,"All");
+ if (fLHC) Boost(particles);
+
+
Int_t np = particles->GetEntriesFast();
printf("\n **************************************************%d\n",np);
Int_t nc = 0;
if (np == 0 ) continue;
Int_t i;
- Int_t * newPos = new Int_t[np];
+ Int_t* newPos = new Int_t[np];
+ Int_t* pSelected = new Int_t[np];
- for (i = 0; i < np; i++) *(newPos+i) = i;
+ for (i = 0; i < np; i++) {
+ newPos[i] = i;
+ pSelected[i] = 0;
+ }
+
+// Get event vertex
//
-// First write parent particles
+ TParticle * iparticle = (TParticle *) particles->At(0);
+ fEventVertex[0] = origin0[0];
+ fEventVertex[1] = origin0[1];
+ fEventVertex[2] = origin0[2];
+
+//
+// First select parent particles
//
for (i = 0; i < np; i++) {
- TParticle * iparticle = (TParticle *) particles->At(i);
+ iparticle = (TParticle *) particles->At(i);
// Is this a parent particle ?
- if (Stable(iparticle)) continue;
+ if (Stable(iparticle)) continue;
//
- Bool_t hasMother = (iparticle->GetFirstMother() >=0);
- Bool_t selected = kTRUE;
- Bool_t hasSelectedDaughters = kFALSE;
-
-
- kf = iparticle->GetPdgCode();
- ks = iparticle->GetStatusCode();
- if (kf == 92) continue;
-
- if (!fSelectAll) selected = KinematicSelection(iparticle, 0)&&SelectFlavor(kf);
- hasSelectedDaughters = DaughtersSelection(iparticle, particles);
-//
-// Put particle on the stack if it is either selected or it is the mother of at least one seleted particle
-//
- if (selected || hasSelectedDaughters) {
- nc++;
- p[0] = iparticle->Px();
- p[1] = iparticle->Py();
- p[2] = iparticle->Pz();
- origin[0] = origin0[0]+iparticle->Vx()/10;
- origin[1] = origin0[1]+iparticle->Vy()/10;
- origin[2] = origin0[2]+iparticle->Vz()/10;
- tof = kconv*iparticle->T();
- imo = -1;
- TParticle* mother = 0;
- if (hasMother) {
- imo = iparticle->GetFirstMother();
- mother = (TParticle *) particles->At(imo);
- imo = (mother->GetPdgCode() != 92) ? imo =* (newPos+imo) : -1;
-
- }
-// Put particle on the stack ...
-// printf("\n set track mother: %d %d %d %d %d %d ",i,imo, kf, nt+1, selected, hasSelectedDaughters);
+ Bool_t selected = kTRUE;
+ Bool_t hasSelectedDaughters = kFALSE;
+
+
+ kf = iparticle->GetPdgCode();
+ ks = iparticle->GetStatusCode();
+ if (kf == 92) continue;
- SetTrack(0,imo,kf,p,origin,polar, tof,kPPrimary,nt);
-// ... and keep it there
- KeepTrack(nt);
+ if (!fSelectAll) selected = KinematicSelection(iparticle, 0) &&
+ SelectFlavor(kf);
+ hasSelectedDaughters = DaughtersSelection(iparticle, particles);
//
- *(newPos+i)=nt;
- } // selected
+// Put particle on the stack if it is either selected or
+// it is the mother of at least one seleted particle
+//
+ if (selected || hasSelectedDaughters) {
+ nc++;
+ pSelected[i] = 1;
+ } // selected
} // particle loop parents
//
-// Now write the final state particles
+// Now select the final state particles
//
for (i = 0; i<np; i++) {
- TParticle * iparticle = (TParticle *) particles->At(i);
+ TParticle * iparticle = (TParticle *) particles->At(i);
// Is this a final state particle ?
- if (!Stable(iparticle)) continue;
-
- Bool_t hasMother = (iparticle->GetFirstMother() >=0);
- Bool_t selected = kTRUE;
- kf = iparticle->GetPdgCode();
- ks = iparticle->GetStatusCode();
+ if (!Stable(iparticle)) continue;
+
+ Bool_t selected = kTRUE;
+ kf = iparticle->GetPdgCode();
+ ks = iparticle->GetStatusCode();
// --------------------------------------------------------------------------
// Count spectator neutrons and protons
- if(ks == 0 || ks == 1 || ks == 10 || ks == 11){
- if(kf == kNeutron) fSpecn += 1;
- if(kf == kProton) fSpecp += 1;
- }
+ if(ks == 0 || ks == 1 || ks == 10 || ks == 11){
+ if(kf == kNeutron) fSpecn += 1;
+ if(kf == kProton) fSpecp += 1;
+ }
// --------------------------------------------------------------------------
//
- if (!fSelectAll) {
- selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
- if (!fSpectators && selected) selected = (ks != 0 && ks != 1 && ks != 10
- && ks != 11);
- }
+ if (!fSelectAll) {
+ selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
+ if (!fSpectators && selected) selected = (ks != 0 && ks != 1 && ks != 10
+ && ks != 11);
+ }
//
// Put particle on the stack if selected
//
- if (selected) {
- nc++;
- p[0] = iparticle->Px();
- p[1] = iparticle->Py();
- p[2] = iparticle->Pz();
- origin[0] = origin0[0]+iparticle->Vx()/10;
- origin[1] = origin0[1]+iparticle->Vy()/10;
- origin[2] = origin0[2]+iparticle->Vz()/10;
- tof = kconv*iparticle->T();
- imo = -1;
- TParticle* mother = 0;
- if (hasMother) {
- imo = iparticle->GetFirstMother();
- mother = (TParticle *) particles->At(imo);
- imo = (mother->GetPdgCode() != 92) ? imo=*(newPos+imo) : -1;
- }
-// Put particle on the stack
- SetTrack(fTrackIt,imo,kf,p,origin,polar,
- tof,kPNoProcess,nt);
- KeepTrack(nt);
- *(newPos+i)=nt;
- } // selected
+ if (selected) {
+ nc++;
+ pSelected[i] = 1;
+ } // selected
} // particle loop final state
-
+//
+// Write particles to stack
+//
+ for (i = 0; i<np; i++) {
+ TParticle * iparticle = (TParticle *) particles->At(i);
+ Bool_t hasMother = (iparticle->GetFirstMother() >=0);
+ Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0);
+
+ if (pSelected[i]) {
+ kf = iparticle->GetPdgCode();
+ p[0] = iparticle->Px();
+ p[1] = iparticle->Py();
+ p[2] = iparticle->Pz();
+ origin[0] = origin0[0]+iparticle->Vx()/10;
+ origin[1] = origin0[1]+iparticle->Vy()/10;
+ origin[2] = origin0[2]+iparticle->Vz()/10;
+ tof = kconv*iparticle->T();
+ imo = -1;
+ TParticle* mother = 0;
+ if (hasMother) {
+ imo = iparticle->GetFirstMother();
+ mother = (TParticle *) particles->At(imo);
+ imo = (mother->GetPdgCode() != 92) ? imo = newPos[imo] : -1;
+ } // if has mother
+ Bool_t tFlag = (fTrackIt && !hasDaughter);
+ SetTrack(tFlag,imo,kf,p,origin,polar,
+ tof,kPNoProcess,nt);
+ KeepTrack(nt);
+ newPos[i] = nt;
+ } // if selected
+ } // particle loop
delete[] newPos;
-
+ delete[] pSelected;
+
printf("\n I've put %i particles on the stack \n",nc);
if (nc > 0) {
jev += nc;
}
} // event loop
MakeHeader();
-
SetHighWaterMark(nt);
}
// 0: all
// 4: charm and beauty
// 5: beauty
- if (fFlavor == 0) return kTRUE;
+ Bool_t res = 0;
- Int_t ifl = TMath::Abs(pid/100);
- if (ifl > 10) ifl/=10;
- return (fFlavor == ifl);
+ if (fFlavor == 0) {
+ res = kTRUE;
+ } else {
+ Int_t ifl = TMath::Abs(pid/100);
+ if (ifl > 10) ifl/=10;
+ res = (fFlavor == ifl);
+ }
+//
+// This part if gamma writing is inhibited
+ if (fNoGammas)
+ res = res && (pid != kGamma && pid != kPi0);
+//
+ return res;
}
Bool_t AliGenHijing::Stable(TParticle* particle)
{
// Return true for a stable particle
//
+
if (particle->GetFirstDaughter() < 0 )
{
return kTRUE;
}
}
+
+void AliGenHijing::Boost(TClonesArray* particles)
+{
+//
+// Boost cms into LHC lab frame
+//
+ Double_t dy = - 0.5 * TMath::Log(Double_t(fZProjectile) * Double_t(fATarget) /
+ (Double_t(fZTarget) * Double_t(fAProjectile)));
+ Double_t beta = TMath::TanH(dy);
+ Double_t gamma = 1./TMath::Sqrt(1.-beta*beta);
+ Double_t gb = gamma * beta;
+
+ printf("\n Boosting particles to lab frame %f %f %f", dy, beta, gamma);
+
+ Int_t i;
+ Int_t np = particles->GetEntriesFast();
+ for (i = 0; i < np; i++)
+ {
+ TParticle* iparticle = (TParticle*) particles->At(i);
+
+ Double_t e = iparticle->Energy();
+ Double_t px = iparticle->Px();
+ Double_t py = iparticle->Py();
+ Double_t pz = iparticle->Pz();
+
+ Double_t eb = gamma * e - gb * pz;
+ Double_t pzb = -gb * e + gamma * pz;
+
+ iparticle->SetMomentum(px, py, pzb, eb);
+ }
+}
+
+
void AliGenHijing::MakeHeader()
{
// Builds the event header, to be called after each event
fHijing->GetN11());
((AliGenHijingEventHeader*) header)->SetSpectators(fSpecn, fSpecp);
+// 4-momentum vectors of the triggered jets.
+//
+// Before final state gluon radiation.
TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(21),
fHijing->GetHINT1(22),
fHijing->GetHINT1(23),
fHijing->GetHINT1(32),
fHijing->GetHINT1(33),
fHijing->GetHINT1(34));
-
- ((AliGenHijingEventHeader*) header)->SetJets(jet1, jet2);
+// After final state gluon radiation.
+ TLorentzVector* jet3 = new TLorentzVector(fHijing->GetHINT1(26),
+ fHijing->GetHINT1(27),
+ fHijing->GetHINT1(28),
+ fHijing->GetHINT1(29));
+
+ TLorentzVector* jet4 = new TLorentzVector(fHijing->GetHINT1(36),
+ fHijing->GetHINT1(37),
+ fHijing->GetHINT1(38),
+ fHijing->GetHINT1(39));
+ ((AliGenHijingEventHeader*) header)->SetJets(jet1, jet2, jet3, jet4);
+// Bookkeeping for kinematic bias
+ ((AliGenHijingEventHeader*) header)->SetTrials(fTrials);
+// Event Vertex
+ header->SetPrimaryVertex(fEventVertex);
gAlice->SetGenEventHeader(header);
}
+Bool_t AliGenHijing::CheckTrigger()
+{
+// Check the kinematic trigger condition
+//
+ TLorentzVector* jet1 = new TLorentzVector(fHijing->GetHINT1(26),
+ fHijing->GetHINT1(27),
+ fHijing->GetHINT1(28),
+ fHijing->GetHINT1(29));
+
+ TLorentzVector* jet2 = new TLorentzVector(fHijing->GetHINT1(36),
+ fHijing->GetHINT1(37),
+ fHijing->GetHINT1(38),
+ fHijing->GetHINT1(39));
+ Double_t eta1 = jet1->Eta();
+ Double_t eta2 = jet2->Eta();
+ Double_t phi1 = jet1->Phi();
+ Double_t phi2 = jet2->Phi();
+ Bool_t triggered = kFALSE;
+// printf("\n Trigger: %f %f %f %f",
+// fEtaMinJet, fEtaMaxJet, fPhiMinJet, fPhiMaxJet);
+// printf("\n Jet1: %f %f", phi1, eta1);
+// printf("\n Jet2: %f %f", phi2, eta2);
+
+
+ if (
+ (eta1 < fEtaMaxJet && eta1 > fEtaMinJet &&
+ phi1 < fPhiMaxJet && phi1 > fPhiMinJet)
+ ||
+ (eta2 < fEtaMaxJet && eta2 > fEtaMinJet &&
+ phi2 < fPhiMaxJet && phi2 > fPhiMinJet)
+ )
+ triggered = kTRUE;
+
+ return triggered;
+}
+
+
+
+
AliGenHijing& AliGenHijing::operator=(const AliGenHijing& rhs)
{
// Assignment operator
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff