// Generator using HIJING as an external generator
// The main HIJING options are accessable for the user through this interface.
// Uses the THijing implementation of TGenerator.
+// Author:
+// Andreas Morsch (andreas.morsch@cern.ch)
//
-// andreas.morsch@cern.ch
-#include <TArrayI.h>
+#include <TClonesArray.h>
#include <TGraph.h>
#include <THijing.h>
#include <TLorentzVector.h>
ClassImp(AliGenHijing)
AliGenHijing::AliGenHijing()
- :AliGenMC()
+ :AliGenMC(),
+ fFrame("CMS"),
+ fMinImpactParam(0.),
+ fMaxImpactParam(5.),
+ fKeep(0),
+ fQuench(1),
+ fShadowing(1),
+ fDecaysOff(1),
+ fTrigger(0),
+ fEvaluate(0),
+ fSelectAll(0),
+ fFlavor(0),
+ fEnergyCMS(5500.),
+ fKineBias(0.),
+ fTrials(0),
+ fXsection(0.),
+ fHijing(0),
+ fPtHardMin(0.),
+ fPtHardMax(1.e4),
+ fSpectators(1),
+ fDsigmaDb(0),
+ fDnDb(0),
+ fPtMinJet(-2.5),
+ fEtaMinJet(-20.),
+ fEtaMaxJet(+20.),
+ fPhiMinJet(0.),
+ fPhiMaxJet(2. * TMath::Pi()),
+ fRadiation(3),
+ fSimpleJet(kFALSE),
+ fNoGammas(kFALSE),
+ fProjectileSpecn(0),
+ fProjectileSpecp(0),
+ fTargetSpecn(0),
+ fTargetSpecp(0),
+ fLHC(kFALSE),
+ fRandomPz(kFALSE),
+ fNoHeavyQuarks(kFALSE)
{
// Constructor
fParticles = 0;
- fHijing = 0;
- fDsigmaDb = 0;
- fDnDb = 0;
AliHijingRndm::SetHijingRandom(GetRandom());
}
AliGenHijing::AliGenHijing(Int_t npart)
- :AliGenMC(npart)
+ :AliGenMC(npart),
+ fFrame("CMS"),
+ fMinImpactParam(0.),
+ fMaxImpactParam(5.),
+ fKeep(0),
+ fQuench(1),
+ fShadowing(1),
+ fDecaysOff(1),
+ fTrigger(0),
+ fEvaluate(0),
+ fSelectAll(0),
+ fFlavor(0),
+ fEnergyCMS(5500.),
+ fKineBias(0.),
+ fTrials(0),
+ fXsection(0.),
+ fHijing(0),
+ fPtHardMin(0.),
+ fPtHardMax(1.e4),
+ fSpectators(1),
+ fDsigmaDb(0),
+ fDnDb(0),
+ fPtMinJet(-2.5),
+ fEtaMinJet(-20.),
+ fEtaMaxJet(+20.),
+ fPhiMinJet(0.),
+ fPhiMaxJet(2. * TMath::Pi()),
+ fRadiation(3),
+ fSimpleJet(kFALSE),
+ fNoGammas(kFALSE),
+ fProjectileSpecn(0),
+ fProjectileSpecp(0),
+ fTargetSpecn(0),
+ fTargetSpecp(0),
+ fLHC(kFALSE),
+ fRandomPz(kFALSE),
+ fNoHeavyQuarks(kFALSE)
{
// Default PbPb collisions at 5. 5 TeV
//
fName = "Hijing";
fTitle= "Particle Generator using HIJING";
-
- SetEnergyCMS();
- SetImpactParameterRange();
- SetBoostLHC();
- SetJetEtaRange();
- SetJetPhiRange();
-
- fKeep = 0;
- fQuench = 1;
- fShadowing = 1;
- fTrigger = 0;
- fDecaysOff = 1;
- fEvaluate = 0;
- fSelectAll = 0;
- fFlavor = 0;
- fSpectators = 1;
- fDsigmaDb = 0;
- fDnDb = 0;
- fPtMinJet = -2.5;
- fRadiation = 3;
- //
- SetSimpleJets();
- SetNoGammas();
//
fParticles = new TClonesArray("TParticle",10000);
//
// Set random number generator
AliHijingRndm::SetHijingRandom(GetRandom());
- fHijing = 0;
-
-}
-
-AliGenHijing::AliGenHijing(const AliGenHijing & hijing):
- AliGenMC(hijing)
-{
-// copy constructor
}
-
AliGenHijing::~AliGenHijing()
{
// Destructor
fHijing->SetHIPR1(11, 2.5);
}
+//
+// Heavy quarks
+//
+ if (fNoHeavyQuarks) {
+ fHijing->SetIHPR2(49, 1);
+ } else {
+ fHijing->SetIHPR2(49, 0);
+ }
+
AliGenMC::Init();
Float_t tof;
// converts from mm/c to s
- const Float_t kconv = 0.001/2.999792458e8;
+ const Float_t kconv = 0.001/2.99792458e8;
//
Int_t nt = 0;
Int_t jev = 0;
- Int_t j, kf, ks, imo;
+ Int_t j, kf, ks, ksp, imo;
kf = 0;
for (j=0; j < 3; j++) origin0[j] = fVertex[j];
}
+
+ Float_t sign = (fRandomPz && (Rndm() < 0.5))? -1. : 1.;
while(1)
{
// Generate one event
// --------------------------------------------------------------------------
- fSpecn = 0;
- fSpecp = 0;
+ fProjectileSpecn = 0;
+ fProjectileSpecp = 0;
+ fTargetSpecn = 0;
+ fTargetSpecp = 0;
// --------------------------------------------------------------------------
fHijing->GenerateEvent();
fTrials++;
Bool_t selected = kTRUE;
kf = iparticle->GetPdgCode();
ks = iparticle->GetStatusCode();
+ ksp = iparticle->GetUniqueID();
// --------------------------------------------------------------------------
// 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(ksp == 0 || ksp == 1){
+ if(kf == kNeutron) fProjectileSpecn += 1;
+ if(kf == kProton) fProjectileSpecp += 1;
+ }
+ else if(ksp == 10 || ksp == 11){
+ if(kf == kNeutron) fTargetSpecn += 1;
+ if(kf == kProton) fTargetSpecp += 1;
}
// --------------------------------------------------------------------------
//
if (!fSelectAll) {
selected = KinematicSelection(iparticle,0)&&SelectFlavor(kf);
- if (!fSpectators && selected) selected = (ks != 0 && ks != 1 && ks != 10
- && ks != 11);
+ if (!fSpectators && selected) selected = (ksp != 0 && ksp != 1 && ksp != 10
+ && ksp != 11);
}
//
// Put particle on the stack if selected
pSelected[i] = 1;
} // selected
} // particle loop final state
+
//
-// Write particles to stack
+// Time of the interactions
+ Float_t tInt = 0.;
+ if (fPileUpTimeWindow > 0.) tInt = fPileUpTimeWindow * (2. * gRandom->Rndm() - 1.);
+
//
+// Write particles to stack
+
for (i = 0; i<np; i++) {
TParticle * iparticle = (TParticle *) fParticles->At(i);
Bool_t hasMother = (iparticle->GetFirstMother() >=0);
Bool_t hasDaughter = (iparticle->GetFirstDaughter() >=0);
-
if (pSelected[i]) {
kf = iparticle->GetPdgCode();
ks = iparticle->GetStatusCode();
p[0] = iparticle->Px();
p[1] = iparticle->Py();
- p[2] = iparticle->Pz();
+ p[2] = iparticle->Pz() * sign;
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();
+ tof = kconv * iparticle->T() + sign * origin0[2] / 3.e10;
+ if (fPileUpTimeWindow > 0.) tof += tInt;
+
imo = -1;
TParticle* mother = 0;
if (hasMother) {
imo = iparticle->GetFirstMother();
mother = (TParticle *) fParticles->At(imo);
- imo = (mother->GetPdgCode() != 92) ? imo = newPos[imo] : -1;
+ imo = (mother->GetPdgCode() != 92) ? newPos[imo] : -1;
} // if has mother
Bool_t tFlag = (fTrackIt && !hasDaughter);
- PushTrack(tFlag,imo,kf,p,origin,polar,
- tof,kPNoProcess,nt, 1., ks);
+ PushTrack(tFlag,imo,kf,p,origin,polar,tof,kPNoProcess,nt, 1., ks);
+
+
KeepTrack(nt);
newPos[i] = nt;
} // if selected
return res;
}
-Bool_t AliGenHijing::Stable(TParticle* particle)
+Bool_t AliGenHijing::Stable(TParticle* particle) const
{
// Return true for a stable particle
//
fHijing->GetN01(),
fHijing->GetN10(),
fHijing->GetN11());
- ((AliGenHijingEventHeader*) header)->SetSpectators(fSpecn, fSpecp);
+ ((AliGenHijingEventHeader*) header)->SetSpectators(fProjectileSpecn, fProjectileSpecp,
+ fTargetSpecn,fTargetSpecp);
+ ((AliGenHijingEventHeader*) header)->SetReactionPlaneAngle(fHijing->GetHINT1(20));
+
+
// 4-momentum vectors of the triggered jets.
//
((AliGenHijingEventHeader*) header)->SetTrials(fTrials);
// Event Vertex
header->SetPrimaryVertex(fVertex);
- gAlice->SetGenEventHeader(header);
+ AddHeader(header);
fCollisionGeometry = (AliGenHijingEventHeader*) header;
}
+void AliGenHijing::AddHeader(AliGenEventHeader* header)
+{
+ // Passes header either to the container or to gAlice
+ if (fContainer) {
+ fContainer->AddHeader(header);
+ } else {
+ gAlice->SetGenEventHeader(header);
+ }
+}
+
+
Bool_t AliGenHijing::CheckTrigger()
{
// Check the kinematic trigger condition
for (Int_t i = 0; i < np; i++) {
TParticle* part = (TParticle*) fParticles->At(i);
Int_t kf = part->GetPdgCode();
- Int_t ks = part->GetStatusCode();
- if (kf == 22 && ks == 40) {
+ Int_t ksp = part->GetUniqueID();
+ if (kf == 22 && ksp == 40) {
Float_t phi = part->Phi();
Float_t eta = part->Eta();
if (eta < fEtaMaxJet &&
} // fTrigger == 2
return triggered;
}
-
-
-void AliGenHijing::Copy(AliGenHijing &) const
-{
- Fatal("Copy","Not implemented!\n");
-}
-
-AliGenHijing& AliGenHijing::operator=(const AliGenHijing& rhs)
-{
- rhs.Copy(*this);
- return (*this);
-}
-
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff