/*
$Log$
+Revision 1.57 2002/05/22 13:22:53 morsch
+Process kPyMbNonDiffr added.
+
+Revision 1.56 2002/04/26 10:30:01 morsch
+Option kPyBeautyPbMNR added. (N. Carrer).
+
+Revision 1.55 2002/04/17 10:23:56 morsch
+Coding Rule violations corrected.
+
+Revision 1.54 2002/03/28 11:49:10 morsch
+Pass status code in SetTrack.
+
+Revision 1.53 2002/03/25 14:51:13 morsch
+New stack-fill and count options introduced (N. Carrer).
+
+Revision 1.51 2002/03/06 08:46:57 morsch
+- Loop until np-1
+- delete dyn. alloc. arrays (N. Carrer)
+
+Revision 1.50 2002/03/03 13:48:50 morsch
+Option kPyCharmPbMNR added. Produce charm pairs in agreement with MNR
+NLO calculations (Nicola Carrer).
+
+Revision 1.49 2002/02/08 16:50:50 morsch
+Add name and title in constructor.
+
+Revision 1.48 2001/12/20 11:44:28 morsch
+Add kinematic bias for direct gamma production.
+
+Revision 1.47 2001/12/19 14:45:00 morsch
+Store number of trials in header.
+
Revision 1.46 2001/12/19 10:36:19 morsch
Add possibility if jet kinematic biasing.
Introduction of the Copyright and cvs Log
*/
+//
+// Generator using the TPythia interface (via AliPythia)
+// to generate pp collisions.
+// Using SetNuclei() also nuclear modifications to the structure functions
+// can be taken into account. This makes, of course, only sense for the
+// generation of the products of hard processes (heavy flavor, jets ...)
+//
+// andreas.morsch@cern.ch
+//
+
+
#include "AliGenPythia.h"
#include "AliGenPythiaEventHeader.h"
#include "AliDecayerPythia.h"
// semimuonic decay
// structure function GRVHO
//
+ fName = "Pythia";
+ fTitle= "Particle Generator using PYTHIA";
fXsection = 0.;
fNucA1=0;
fNucA2=0;
SetEventListRange();
SetJetPhiRange();
SetJetEtaRange();
+ // Options determining what to keep in the stack (Heavy flavour generation)
+ fStackFillOpt = kFlavorSelection; // Keep particle with selected flavor
+ fFeedDownOpt = kTRUE; // allow feed down from higher family
+ // Fragmentation on/off
+ fFragmentation = kTRUE;
+ // Default counting mode
+ fCountMode = kCountAll;
}
AliGenPythia::AliGenPythia(const AliGenPythia & Pythia)
{
// copy constructor
+ Pythia.Copy(*this);
}
AliGenPythia::~AliGenPythia()
fPythia->SetCKIN(3,fPtHardMin);
- fPythia->SetCKIN(4,fPtHardMax);
+ fPythia->SetCKIN(4,fPtHardMax);
+ fPythia->SetCKIN(7,fYHardMin);
+ fPythia->SetCKIN(8,fYHardMax);
+
if (fNucA1 > 0 && fNucA2 > 0) fPythia->SetNuclei(fNucA1, fNucA2);
+ // Fragmentation?
+ if (fFragmentation) {
+ fPythia->SetMSTP(111,1);
+ } else {
+ fPythia->SetMSTP(111,0);
+ }
+
fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc);
// fPythia->Pylist(0);
switch (fProcess)
{
case kPyCharm:
- fParentSelect[0] = 411;
- fParentSelect[1] = 421;
- fParentSelect[2] = 431;
- fParentSelect[3] = 4122;
- fFlavorSelect = 4;
- break;
case kPyCharmUnforced:
- fParentSelect[0] = 411;
- fParentSelect[1] = 421;
- fParentSelect[2] = 431;
- fParentSelect[3]= 4122;
- fFlavorSelect = 4;
+ case kPyCharmPbMNR:
+ fParentSelect[0] = 411;
+ fParentSelect[1] = 421;
+ fParentSelect[2] = 431;
+ fParentSelect[3] = 4122;
+ fFlavorSelect = 4;
+ break;
+ case kPyD0PbMNR:
+ fParentSelect[0] = 421;
+ fFlavorSelect = 4;
break;
case kPyBeauty:
+ case kPyBeautyPbMNR:
fParentSelect[0]= 511;
fParentSelect[1]= 521;
fParentSelect[2]= 531;
fParentSelect[0] = 443;
break;
case kPyMb:
+ case kPyMbNonDiffr:
case kPyJets:
case kPyDirectGamma:
break;
Int_t* pParent = new Int_t[np];
Int_t* pSelected = new Int_t[np];
Int_t* trackIt = new Int_t[np];
- for (i=0; i< np-1; i++) {
+ for (i=0; i< np; i++) {
pParent[i] = -1;
pSelected[i] = 0;
+ trackIt[i] = 0;
}
- printf("\n **************************************************%d\n",np);
- Int_t nc = 0;
- if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma) {
+ // printf("\n **************************************************%d\n",np);
+ Int_t nc = 0; // Total n. of selected particles
+ Int_t nParents = 0; // Selected parents
+ Int_t nTkbles = 0; // Trackable particles
+ if (fProcess != kPyMb && fProcess != kPyJets && fProcess != kPyDirectGamma &&
+ fProcess != kPyMbNonDiffr) {
- for (i = 0; i<np-1; i++) {
+ for (i = 0; i<np; i++) {
iparticle = (TParticle *) fParticles->At(i);
Int_t ks = iparticle->GetStatusCode();
kf = CheckPDGCode(iparticle->GetPdgCode());
kfMo = TMath::Abs(mother->GetPdgCode());
}
// printf("\n particle (all) %d %d %d", i, pSelected[i], kf);
- if (kfl >= fFlavorSelect) {
+ // What to keep in Stack?
+ Bool_t flavorOK = kFALSE;
+ Bool_t selectOK = kFALSE;
+ if (fFeedDownOpt) {
+ if (kfl >= fFlavorSelect) flavorOK = kTRUE;
+ } else {
+ if (kfl > fFlavorSelect) {
+ nc = -1;
+ break;
+ }
+ if (kfl == fFlavorSelect) flavorOK = kTRUE;
+ }
+ switch (fStackFillOpt) {
+ case kFlavorSelection:
+ selectOK = kTRUE;
+ break;
+ case kParentSelection:
+ if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE;
+ break;
+ }
+ if (flavorOK && selectOK) {
//
// Heavy flavor hadron or quark
//
// Kinematic seletion on final state heavy flavor mesons
if (ParentSelected(kf) && !KinematicSelection(iparticle, 0))
{
- nc = -1;
- break;
+ continue;
}
pSelected[i] = 1;
+ if (ParentSelected(kf)) ++nParents; // Update parent count
// printf("\n particle (HF) %d %d %d", i, pSelected[i], kf);
} else {
// Kinematic seletion on decay products
if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf)
&& !KinematicSelection(iparticle, 1))
{
- nc = -1;
- break;
+ continue;
}
//
// Decay products
}
if (pSelected[i] == -1) pSelected[i] = 0;
if (!pSelected[i]) continue;
+ // Count quarks only if you did not include fragmentation
+ if (fFragmentation && kf <= 10) continue;
nc++;
// Decision on tracking
trackIt[i] = 0;
} else {
if (ParentSelected(kf)) trackIt[i] = 0;
}
+ if (trackIt[i] == 1) ++nTkbles; // Update trackable counter
//
//
} // particle selection loop
- if (nc > -1) {
- for (i = 0; i<np-1; i++) {
+ if (nc > 0) {
+ for (i = 0; i<np; i++) {
if (!pSelected[i]) continue;
TParticle * iparticle = (TParticle *) fParticles->At(i);
kf = CheckPDGCode(iparticle->GetPdgCode());
+ Int_t ks = iparticle->GetStatusCode();
p[0] = iparticle->Px();
p[1] = iparticle->Py();
p[2] = iparticle->Pz();
Int_t ipa = iparticle->GetFirstMother()-1;
Int_t iparent = (ipa > -1) ? pParent[ipa] : -1;
SetTrack(fTrackIt*trackIt[i] ,
- iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1.);
+ iparent, kf, p, origin, polar, tof, kPPrimary, nt, 1., ks);
pParent[i] = nt;
KeepTrack(nt);
} // SetTrack loop
nc = GenerateMB();
} // mb ?
+ if (pParent) delete[] pParent;
+ if (pSelected) delete[] pSelected;
+ if (trackIt) delete[] trackIt;
+
if (nc > 0) {
- jev+=nc;
+ switch (fCountMode) {
+ case kCountAll:
+ // printf(" Count all \n");
+ jev += nc;
+ break;
+ case kCountParents:
+ // printf(" Count parents \n");
+ jev += nParents;
+ break;
+ case kCountTrackables:
+ // printf(" Count trackable \n");
+ jev += nTkbles;
+ break;
+ }
if (jev >= fNpart || fNpart == -1) {
fKineBias=Float_t(fNpart)/Float_t(fTrials);
printf("\n Trials: %i %i %i\n",fTrials, fNpart, jev);
Int_t AliGenPythia::GenerateMB()
{
+//
+// Min Bias selection and other global selections
+//
Int_t i, kf, nt, iparent;
Int_t nc = 0;
Float_t p[3];
Int_t np = fParticles->GetEntriesFast();
Int_t* pParent = new Int_t[np];
- for (i=0; i< np-1; i++) pParent[i] = -1;
- if (fProcess == kPyJets) {
+ for (i=0; i< np; i++) pParent[i] = -1;
+ if (fProcess == kPyJets || fProcess == kPyDirectGamma) {
TParticle* jet1 = (TParticle *) fParticles->At(6);
TParticle* jet2 = (TParticle *) fParticles->At(7);
if (!CheckTrigger(jet1, jet2)) return 0;
}
- for (i = 0; i<np-1; i++) {
+ for (i = 0; i<np; i++) {
Int_t trackIt = 0;
TParticle * iparticle = (TParticle *) fParticles->At(i);
kf = CheckPDGCode(iparticle->GetPdgCode());
nc++;
if (ks == 1) trackIt = 1;
Int_t ipa = iparticle->GetFirstMother()-1;
-
+
iparent = (ipa > -1) ? pParent[ipa] : -1;
-
+
//
// store track information
p[0] = iparticle->Px();
origin[2] = fOrigin[2]+iparticle->Vz()/10.;
Float_t tof=kconv*iparticle->T();
SetTrack(fTrackIt*trackIt, iparent, kf, p, origin, polar,
- tof, kPPrimary, nt);
+ tof, kPPrimary, nt, 1., ks);
KeepTrack(nt);
pParent[i] = nt;
} // select particle
}
-void AliGenPythia::MakeHeader()
+void AliGenPythia::MakeHeader() const
{
// Builds the event header, to be called after each event
AliGenEventHeader* header = new AliGenPythiaEventHeader("Pythia");
}
-Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2)
+Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2) const
{
// Check the kinematic trigger condition
//
- Double_t eta1 = jet1->Eta();
- Double_t eta2 = jet2->Eta();
- Double_t phi1 = jet1->Phi();
- Double_t phi2 = jet2->Phi();
+ Double_t eta[2];
+ eta[0] = jet1->Eta();
+ eta[1] = jet2->Eta();
+ Double_t phi[2];
+ phi[0] = jet1->Phi();
+ phi[1] = jet2->Phi();
+ Int_t pdg[2];
+ pdg[0] = jet1->GetPdgCode();
+ pdg[1] = jet2->GetPdgCode();
Bool_t triggered = kFALSE;
- //Check eta range first...
- if ((eta1 < fEtaMaxJet && eta1 > fEtaMinJet) ||
- (eta2 < fEtaMaxJet && eta2 > fEtaMinJet))
- {
- //Eta is okay, now check phi range
- if ((phi1 < fPhiMaxJet && phi1 > fPhiMinJet) ||
- (phi2 < fPhiMaxJet && phi2 > fPhiMinJet))
- {
- triggered = kTRUE;
- }
+
+ if (fProcess == kPyJets) {
+ //Check eta range first...
+ if ((eta[0] < fEtaMaxJet && eta[0] > fEtaMinJet) ||
+ (eta[1] < fEtaMaxJet && eta[1] > fEtaMinJet))
+ {
+ //Eta is okay, now check phi range
+ if ((phi[0] < fPhiMaxJet && phi[0] > fPhiMinJet) ||
+ (phi[1] < fPhiMaxJet && phi[1] > fPhiMinJet))
+ {
+ triggered = kTRUE;
+ }
+ }
+ } else {
+ Int_t ij = 0;
+ Int_t ig = 1;
+ if (pdg[0] == kGamma) {
+ ij = 1;
+ ig = 0;
+ }
+ //Check eta range first...
+ if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) &&
+ (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma))
+ {
+ //Eta is okay, now check phi range
+ if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) &&
+ (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma))
+ {
+ triggered = kTRUE;
+ }
+ }
}
+
+
return triggered;
}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff