1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
19 // Generator using the TPythia interface (via AliPythia)
20 // to generate pp collisions.
21 // Using SetNuclei() also nuclear modifications to the structure functions
22 // can be taken into account. This makes, of course, only sense for the
23 // generation of the products of hard processes (heavy flavor, jets ...)
25 // andreas.morsch@cern.ch
28 #include <TClonesArray.h>
29 #include <TDatabasePDG.h>
30 #include <TParticle.h>
32 #include <TObjArray.h>
36 #include "AliDecayerPythia.h"
37 #include "AliGenPythia.h"
38 #include "AliFastGlauber.h"
39 #include "AliHeader.h"
40 #include "AliGenPythiaEventHeader.h"
41 #include "AliPythia.h"
42 #include "AliPythiaRndm.h"
45 #include "AliRunLoader.h"
47 #include "PyquenCommon.h"
49 ClassImp(AliGenPythia)
52 AliGenPythia::AliGenPythia():
87 fDecayer(new AliDecayerPythia()),
95 fPhiMaxJet(2.* TMath::Pi()),
96 fJetReconstruction(kCell),
100 fPhiMaxGamma(2. * TMath::Pi()),
104 fPycellThreshold(0.),
106 fPycellMinEtJet(10.),
107 fPycellMaxRadius(1.),
108 fStackFillOpt(kFlavorSelection),
110 fFragmentation(kTRUE),
117 fTriggerMultiplicity(0),
118 fTriggerMultiplicityEta(0),
119 fTriggerMultiplicityPtMin(0),
120 fCountMode(kCountAll),
124 fFragPhotonInCalo(kFALSE),
126 fPhotonInCalo(kFALSE),
130 fCheckPHOSeta(kFALSE),
131 fFragPhotonOrPi0MinPt(0),
142 // Default Constructor
144 if (!AliPythiaRndm::GetPythiaRandom())
145 AliPythiaRndm::SetPythiaRandom(GetRandom());
148 AliGenPythia::AliGenPythia(Int_t npart)
160 fInteractionRate(0.),
174 fHadronisation(kTRUE),
176 fReadFromFile(kFALSE),
183 fDecayer(new AliDecayerPythia()),
184 fDebugEventFirst(-1),
191 fPhiMaxJet(2.* TMath::Pi()),
192 fJetReconstruction(kCell),
196 fPhiMaxGamma(2. * TMath::Pi()),
200 fPycellThreshold(0.),
202 fPycellMinEtJet(10.),
203 fPycellMaxRadius(1.),
204 fStackFillOpt(kFlavorSelection),
206 fFragmentation(kTRUE),
213 fTriggerMultiplicity(0),
214 fTriggerMultiplicityEta(0),
215 fTriggerMultiplicityPtMin(0),
216 fCountMode(kCountAll),
220 fFragPhotonInCalo(kFALSE),
222 fPhotonInCalo(kFALSE),
226 fCheckPHOSeta(kFALSE),
227 fFragPhotonOrPi0MinPt(0),
237 // default charm production at 5. 5 TeV
239 // structure function GRVHO
243 fTitle= "Particle Generator using PYTHIA";
245 // Set random number generator
246 if (!AliPythiaRndm::GetPythiaRandom())
247 AliPythiaRndm::SetPythiaRandom(GetRandom());
250 AliGenPythia::~AliGenPythia()
253 if(fEventsTime) delete fEventsTime;
256 void AliGenPythia::SetInteractionRate(Float_t rate,Float_t timewindow)
258 // Generate pileup using user specified rate
259 fInteractionRate = rate;
260 fTimeWindow = timewindow;
264 void AliGenPythia::GeneratePileup()
266 // Generate sub events time for pileup
268 if(fInteractionRate == 0.) {
269 Warning("GeneratePileup","Zero interaction specified. Skipping pileup generation.\n");
273 Int_t npart = NumberParticles();
275 Warning("GeneratePileup","Negative number of particles. Skipping pileup generation.\n");
279 if(fEventsTime) delete fEventsTime;
280 fEventsTime = new TArrayF(npart);
281 TArrayF &array = *fEventsTime;
282 for(Int_t ipart = 0; ipart < npart; ipart++)
285 Float_t eventtime = 0.;
288 eventtime += (AliPythiaRndm::GetPythiaRandom())->Exp(1./fInteractionRate);
289 if(eventtime > fTimeWindow) break;
290 array.Set(array.GetSize()+1);
291 array[array.GetSize()-1] = eventtime;
297 eventtime -= (AliPythiaRndm::GetPythiaRandom())->Exp(1./fInteractionRate);
298 if(TMath::Abs(eventtime) > fTimeWindow) break;
299 array.Set(array.GetSize()+1);
300 array[array.GetSize()-1] = eventtime;
303 SetNumberParticles(fEventsTime->GetSize());
306 void AliGenPythia::SetPycellParameters(Float_t etamax, Int_t neta, Int_t nphi,
307 Float_t thresh, Float_t etseed, Float_t minet, Float_t r)
309 // Set pycell parameters
310 fPycellEtaMax = etamax;
313 fPycellThreshold = thresh;
314 fPycellEtSeed = etseed;
315 fPycellMinEtJet = minet;
316 fPycellMaxRadius = r;
321 void AliGenPythia::SetEventListRange(Int_t eventFirst, Int_t eventLast)
323 // Set a range of event numbers, for which a table
324 // of generated particle will be printed
325 fDebugEventFirst = eventFirst;
326 fDebugEventLast = eventLast;
327 if (fDebugEventLast==-1) fDebugEventLast=fDebugEventFirst;
330 void AliGenPythia::Init()
334 SetMC(AliPythia::Instance());
335 fPythia=(AliPythia*) fMCEvGen;
338 fParentWeight=1./Float_t(fNpart);
342 fPythia->SetCKIN(3,fPtHardMin);
343 fPythia->SetCKIN(4,fPtHardMax);
344 fPythia->SetCKIN(7,fYHardMin);
345 fPythia->SetCKIN(8,fYHardMax);
347 if (fAProjectile > 0 && fATarget > 0) fPythia->SetNuclei(fAProjectile, fATarget, fNucPdf);
349 if (fFragmentation) {
350 fPythia->SetMSTP(111,1);
352 fPythia->SetMSTP(111,0);
356 // initial state radiation
357 fPythia->SetMSTP(61,fGinit);
358 // final state radiation
359 fPythia->SetMSTP(71,fGfinal);
362 fPythia->SetMSTP(91,1);
363 fPythia->SetPARP(91,fPtKick);
364 fPythia->SetPARP(93, 4. * fPtKick);
366 fPythia->SetMSTP(91,0);
371 fRL = AliRunLoader::Open(fFileName, "Partons");
372 fRL->LoadKinematics();
378 fPythia->ProcInit(fProcess,fEnergyCMS,fStrucFunc, fItune);
379 // Forward Paramters to the AliPythia object
380 fDecayer->SetForceDecay(fForceDecay);
381 // Switch off Heavy Flavors on request
383 // Maximum number of quark flavours used in pdf
384 fPythia->SetMSTP(58, 3);
385 // Maximum number of flavors that can be used in showers
386 fPythia->SetMSTJ(45, 3);
387 // Switch off g->QQbar splitting in decay table
388 ((AliDecayerPythia*) fDecayer)->HeavyFlavourOff();
394 // Parent and Children Selection
397 case kPyOldUEQ2ordered:
398 case kPyOldUEQ2ordered2:
402 case kPyCharmUnforced:
403 case kPyCharmPbPbMNR:
406 case kPyCharmppMNRwmi:
407 fParentSelect[0] = 411;
408 fParentSelect[1] = 421;
409 fParentSelect[2] = 431;
410 fParentSelect[3] = 4122;
411 fParentSelect[4] = 4232;
412 fParentSelect[5] = 4132;
413 fParentSelect[6] = 4332;
419 fParentSelect[0] = 421;
422 case kPyDPlusPbPbMNR:
425 fParentSelect[0] = 411;
428 case kPyDPlusStrangePbPbMNR:
429 case kPyDPlusStrangepPbMNR:
430 case kPyDPlusStrangeppMNR:
431 fParentSelect[0] = 431;
436 case kPyBeautyPbPbMNR:
437 case kPyBeautypPbMNR:
439 case kPyBeautyppMNRwmi:
440 fParentSelect[0]= 511;
441 fParentSelect[1]= 521;
442 fParentSelect[2]= 531;
443 fParentSelect[3]= 5122;
444 fParentSelect[4]= 5132;
445 fParentSelect[5]= 5232;
446 fParentSelect[6]= 5332;
449 case kPyBeautyUnforced:
450 fParentSelect[0] = 511;
451 fParentSelect[1] = 521;
452 fParentSelect[2] = 531;
453 fParentSelect[3] = 5122;
454 fParentSelect[4] = 5132;
455 fParentSelect[5] = 5232;
456 fParentSelect[6] = 5332;
461 fParentSelect[0] = 443;
464 case kPyMbAtlasTuneMC09:
466 case kPyMbWithDirectPhoton:
479 // JetFinder for Trigger
481 // Configure detector (EMCAL like)
483 fPythia->SetPARU(51, fPycellEtaMax);
484 fPythia->SetMSTU(51, fPycellNEta);
485 fPythia->SetMSTU(52, fPycellNPhi);
487 // Configure Jet Finder
489 fPythia->SetPARU(58, fPycellThreshold);
490 fPythia->SetPARU(52, fPycellEtSeed);
491 fPythia->SetPARU(53, fPycellMinEtJet);
492 fPythia->SetPARU(54, fPycellMaxRadius);
493 fPythia->SetMSTU(54, 2);
495 // This counts the total number of calls to Pyevnt() per run.
510 Warning("Init","SetNuclei used. Use SetProjectile + SetTarget instead. fDyBoost has been reset to 0\n");
513 fPythia->SetPARJ(200, 0.0);
514 fPythia->SetPARJ(199, 0.0);
515 fPythia->SetPARJ(198, 0.0);
516 fPythia->SetPARJ(197, 0.0);
519 fPythia->InitQuenching(0., 0.1, 0.6e6, 0);
523 // Nestor's change of the splittings
524 fPythia->SetPARJ(200, 0.8);
525 fPythia->SetMSTJ(41, 1); // QCD radiation only
526 fPythia->SetMSTJ(42, 2); // angular ordering
527 fPythia->SetMSTJ(44, 2); // option to run alpha_s
528 fPythia->SetMSTJ(47, 0); // No correction back to hard scattering element
529 fPythia->SetMSTJ(50, 0); // No coherence in first branching
530 fPythia->SetPARJ(82, 1.); // Cut off for parton showers
531 } else if (fQuench == 4) {
532 // Armesto-Cunqueiro-Salgado change of the splittings.
533 AliFastGlauber* glauber = AliFastGlauber::Instance();
535 //read and store transverse almonds corresponding to differnt
537 glauber->SetCentralityClass(0.,0.1);
538 fPythia->SetPARJ(200, 1.);
539 fPythia->SetPARJ(198, fQhat);
540 fPythia->SetPARJ(199, fLength);
541 fPythia->SetMSTJ(42, 2); // angular ordering
542 fPythia->SetMSTJ(44, 2); // option to run alpha_s
543 fPythia->SetPARJ(82, 1.); // Cut off for parton showers
547 void AliGenPythia::Generate()
549 // Generate one event
550 if (!fPythia) fPythia=(AliPythia*) fMCEvGen;
551 fDecayer->ForceDecay();
553 Float_t polar[3] = {0,0,0};
554 Float_t origin[3] = {0,0,0};
556 // converts from mm/c to s
557 const Float_t kconv=0.001/2.999792458e8;
567 // Set collision vertex position
568 if (fVertexSmear == kPerEvent) Vertex();
577 // Switch hadronisation off
579 fPythia->SetMSTJ(1, 0);
583 // Quenching comes through medium-modified splitting functions.
584 AliFastGlauber::Instance()->GetRandomBHard(bimp);
585 fPythia->SetPARJ(197, bimp);
589 // Either produce new event or read partons from file
591 if (!fReadFromFile) {
597 fNpartons = fPythia->GetN();
599 printf("Loading Event %d\n",AliRunLoader::Instance()->GetEventNumber());
600 fRL->GetEvent(AliRunLoader::Instance()->GetEventNumber());
602 LoadEvent(fRL->Stack(), 0 , 1);
607 // Run quenching routine
611 } else if (fQuench == 2){
612 fPythia->Pyquen(208., 0, 0.);
613 } else if (fQuench == 3) {
614 // Quenching is via multiplicative correction of the splittings
618 // Switch hadronisation on
620 if (fHadronisation) {
621 fPythia->SetMSTJ(1, 1);
623 // .. and perform hadronisation
624 // printf("Calling hadronisation %d\n", fPythia->GetN());
628 fPythia->ImportParticles(&fParticles,"All");
629 if (TMath::Abs(fDyBoost) > 1.e-4) Boost();
636 Int_t np = fParticles.GetEntriesFast();
638 if (np == 0) continue;
642 Int_t* pParent = new Int_t[np];
643 Int_t* pSelected = new Int_t[np];
644 Int_t* trackIt = new Int_t[np];
645 for (i = 0; i < np; i++) {
651 Int_t nc = 0; // Total n. of selected particles
652 Int_t nParents = 0; // Selected parents
653 Int_t nTkbles = 0; // Trackable particles
654 if (fProcess != kPyMbDefault &&
656 fProcess != kPyMbAtlasTuneMC09 &&
657 fProcess != kPyMbWithDirectPhoton &&
658 fProcess != kPyJets &&
659 fProcess != kPyDirectGamma &&
660 fProcess != kPyMbNonDiffr &&
661 fProcess != kPyMbMSEL1 &&
664 fProcess != kPyCharmppMNRwmi &&
665 fProcess != kPyBeautyppMNRwmi &&
666 fProcess != kPyBeautyJets) {
668 for (i = 0; i < np; i++) {
669 TParticle* iparticle = (TParticle *) fParticles.At(i);
670 Int_t ks = iparticle->GetStatusCode();
671 kf = CheckPDGCode(iparticle->GetPdgCode());
672 // No initial state partons
673 if (ks==21) continue;
675 // Heavy Flavor Selection
682 if (kfl > 100000) kfl %= 100000;
683 if (kfl > 10000) kfl %= 10000;
685 if (kfl > 10) kfl/=100;
687 if (kfl > 10) kfl/=10;
688 Int_t ipa = iparticle->GetFirstMother()-1;
691 // Establish mother daughter relation between heavy quarks and mesons
693 if (kf >= fFlavorSelect && kf <= 6) {
694 Int_t idau = iparticle->GetFirstDaughter() - 1;
696 TParticle* daughter = (TParticle *) fParticles.At(idau);
697 Int_t pdgD = daughter->GetPdgCode();
698 if (pdgD == 91 || pdgD == 92) {
699 Int_t jmin = daughter->GetFirstDaughter() - 1;
700 Int_t jmax = daughter->GetLastDaughter() - 1;
701 for (Int_t jp = jmin; jp <= jmax; jp++)
702 ((TParticle *) fParticles.At(jp))->SetFirstMother(i+1);
703 } // is string or cluster
709 TParticle * mother = (TParticle *) fParticles.At(ipa);
710 kfMo = TMath::Abs(mother->GetPdgCode());
713 // What to keep in Stack?
714 Bool_t flavorOK = kFALSE;
715 Bool_t selectOK = kFALSE;
717 if (kfl >= fFlavorSelect) flavorOK = kTRUE;
719 if (kfl > fFlavorSelect) {
723 if (kfl == fFlavorSelect) flavorOK = kTRUE;
725 switch (fStackFillOpt) {
726 case kFlavorSelection:
729 case kParentSelection:
730 if (ParentSelected(kf) || kf <= 10) selectOK = kTRUE;
733 if (flavorOK && selectOK) {
735 // Heavy flavor hadron or quark
737 // Kinematic seletion on final state heavy flavor mesons
738 if (ParentSelected(kf) && !KinematicSelection(iparticle, 0))
743 if (ParentSelected(kf)) ++nParents; // Update parent count
744 // printf("\n particle (HF) %d %d %d", i, pSelected[i], kf);
746 // Kinematic seletion on decay products
747 if (fCutOnChild && ParentSelected(kfMo) && ChildSelected(kf)
748 && !KinematicSelection(iparticle, 1))
754 // Select if mother was selected and is not tracked
756 if (pSelected[ipa] &&
757 !trackIt[ipa] && // mother will be tracked ?
758 kfMo != 5 && // mother is b-quark, don't store fragments
759 kfMo != 4 && // mother is c-quark, don't store fragments
760 kf != 92) // don't store string
763 // Semi-stable or de-selected: diselect decay products:
766 if (pSelected[i] == -1 || fDecayer->GetLifetime(kf) > fMaxLifeTime)
768 Int_t ipF = iparticle->GetFirstDaughter();
769 Int_t ipL = iparticle->GetLastDaughter();
770 if (ipF > 0) for (j = ipF-1; j < ipL; j++) pSelected[j] = -1;
772 // printf("\n particle (decay) %d %d %d", i, pSelected[i], kf);
773 pSelected[i] = (pSelected[i] == -1) ? 0 : 1;
776 if (pSelected[i] == -1) pSelected[i] = 0;
777 if (!pSelected[i]) continue;
778 // Count quarks only if you did not include fragmentation
779 if (fFragmentation && kf <= 10) continue;
782 // Decision on tracking
785 // Track final state particle
786 if (ks == 1) trackIt[i] = 1;
787 // Track semi-stable particles
788 if ((ks == 1) || (fDecayer->GetLifetime(kf) > fMaxLifeTime)) trackIt[i] = 1;
789 // Track particles selected by process if undecayed.
790 if (fForceDecay == kNoDecay) {
791 if (ParentSelected(kf)) trackIt[i] = 1;
793 if (ParentSelected(kf)) trackIt[i] = 0;
795 if (trackIt[i] == 1) ++nTkbles; // Update trackable counter
799 } // particle selection loop
801 for (i = 0; i<np; i++) {
802 if (!pSelected[i]) continue;
803 TParticle * iparticle = (TParticle *) fParticles.At(i);
804 kf = CheckPDGCode(iparticle->GetPdgCode());
805 Int_t ks = iparticle->GetStatusCode();
806 p[0] = iparticle->Px();
807 p[1] = iparticle->Py();
808 p[2] = iparticle->Pz();
809 p[3] = iparticle->Energy();
811 origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm]
812 origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm]
813 origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm]
815 Float_t tof = kconv*iparticle->T();
816 Int_t ipa = iparticle->GetFirstMother()-1;
817 Int_t iparent = (ipa > -1) ? pParent[ipa] : -1;
819 PushTrack(fTrackIt*trackIt[i], iparent, kf,
820 p[0], p[1], p[2], p[3],
821 origin[0], origin[1], origin[2], tof,
822 polar[0], polar[1], polar[2],
823 kPPrimary, nt, 1., ks);
840 switch (fCountMode) {
842 // printf(" Count all \n");
846 // printf(" Count parents \n");
849 case kCountTrackables:
850 // printf(" Count trackable \n");
854 if (jev >= fNpart || fNpart == -1) {
855 fKineBias=Float_t(fNpart)/Float_t(fTrials);
857 fQ += fPythia->GetVINT(51);
858 fX1 += fPythia->GetVINT(41);
859 fX2 += fPythia->GetVINT(42);
860 fTrialsRun += fTrials;
867 SetHighWaterMark(nt);
868 // adjust weight due to kinematic selection
871 fXsection=fPythia->GetPARI(1);
874 Int_t AliGenPythia::GenerateMB()
877 // Min Bias selection and other global selections
879 Int_t i, kf, nt, iparent;
882 Float_t polar[3] = {0,0,0};
883 Float_t origin[3] = {0,0,0};
884 // converts from mm/c to s
885 const Float_t kconv=0.001/2.999792458e8;
889 Int_t np = (fHadronisation) ? fParticles.GetEntriesFast() : fNpartons;
893 Int_t* pParent = new Int_t[np];
894 for (i=0; i< np; i++) pParent[i] = -1;
895 if (fProcess == kPyJets || fProcess == kPyDirectGamma || fProcess == kPyBeautyJets || fProcess == kPyBeautyppMNRwmi) {
896 TParticle* jet1 = (TParticle *) fParticles.At(6);
897 TParticle* jet2 = (TParticle *) fParticles.At(7);
898 if (!CheckTrigger(jet1, jet2)) {
904 // Select jets with fragmentation photon or pi0 going to PHOS or EMCAL
905 if (fProcess == kPyJets && (fFragPhotonInCalo || fPi0InCalo) ) {
910 if (fFragPhotonInCalo) pdg = 22 ; // Photon
911 else if (fPi0InCalo) pdg = 111 ; // Pi0
913 for (i=0; i< np; i++) {
914 TParticle* iparticle = (TParticle *) fParticles.At(i);
915 if(iparticle->GetStatusCode()==1 && iparticle->GetPdgCode()==pdg &&
916 iparticle->Pt() > fFragPhotonOrPi0MinPt){
917 Int_t imother = iparticle->GetFirstMother() - 1;
918 TParticle* pmother = (TParticle *) fParticles.At(imother);
920 (pdg == 22 && pmother->GetStatusCode() != 11)) //No photon from hadron decay
922 Float_t phi = iparticle->Phi()*180./TMath::Pi(); //Convert to degrees
923 Float_t eta =TMath::Abs(iparticle->Eta()); //in calos etamin=-etamax
924 if((fCheckEMCAL && IsInEMCAL(phi,eta)) ||
925 (fCheckPHOS && IsInPHOS(phi,eta)) )
934 // Select beauty jets with electron in EMCAL
935 if (fProcess == kPyBeautyJets && fEleInEMCAL) {
939 Int_t pdg = 11; //electron
944 for (i=0; i< np; i++) {
945 TParticle* iparticle = (TParticle *) fParticles.At(i);
946 if(iparticle->GetStatusCode()==1 && TMath::Abs(iparticle->GetPdgCode())==pdg &&
947 iparticle->Pt() > fElectronMinPt){
948 pt = iparticle->Pt();
949 phi = iparticle->Phi()*180./TMath::Pi(); //Convert to degrees
950 eta =TMath::Abs(iparticle->Eta()); //in calos etamin=-etamax
951 if(IsInEMCAL(phi,eta))
957 AliDebug(5,Form("Found an electron jet (pt,eta,phi) = (%f,%f,%f)",pt,eta,phi));
959 // Check for minimum multiplicity
960 if (fTriggerMultiplicity > 0) {
961 Int_t multiplicity = 0;
962 for (i = 0; i < np; i++) {
963 TParticle * iparticle = (TParticle *) fParticles.At(i);
965 Int_t statusCode = iparticle->GetStatusCode();
967 // Initial state particle
971 if (fTriggerMultiplicityEta > 0 && TMath::Abs(iparticle->Eta()) > fTriggerMultiplicityEta)
974 if (iparticle->Pt() < fTriggerMultiplicityPtMin)
977 TParticlePDG* pdgPart = iparticle->GetPDG();
978 if (pdgPart && pdgPart->Charge() == 0)
984 if (multiplicity < fTriggerMultiplicity) {
988 Printf("Triggered on event with multiplicity of %d >= %d", multiplicity, fTriggerMultiplicity);
991 // Select events with a photon pt > min pt going to PHOS eta acceptance or exactly PHOS eta phi
992 if ((fProcess == kPyJets || fProcess == kPyDirectGamma) && fPhotonInCalo && (fCheckPHOSeta || fCheckPHOS)){
998 for (i=0; i< np; i++) {
999 TParticle* iparticle = (TParticle *) fParticles.At(i);
1000 Float_t phi = iparticle->Phi()*180./TMath::Pi(); //Convert to degrees
1001 Float_t eta =TMath::Abs(iparticle->Eta());//in calos etamin=-etamax
1003 if(iparticle->GetStatusCode() == 1
1004 && iparticle->GetPdgCode() == pdg
1005 && iparticle->Pt() > fPhotonMinPt
1008 // first check if the photon is in PHOS phi
1009 if(IsInPHOS(phi,eta)){
1013 if(fCheckPHOSeta) iphcand = i; // candiate photon to rotate in phi
1018 if(!okd && iphcand != -1) // execute rotation in phi
1019 RotatePhi(iphcand,okd);
1025 if (fTriggerParticle) {
1026 Bool_t triggered = kFALSE;
1027 for (i = 0; i < np; i++) {
1028 TParticle * iparticle = (TParticle *) fParticles.At(i);
1029 kf = CheckPDGCode(iparticle->GetPdgCode());
1030 if (kf != fTriggerParticle) continue;
1031 if (iparticle->Pt() == 0.) continue;
1032 if (TMath::Abs(iparticle->Eta()) > fTriggerEta) continue;
1043 // Check if there is a ccbar or bbbar pair with at least one of the two
1044 // in fYMin < y < fYMax
1046 if (fProcess == kPyCharmppMNRwmi || fProcess == kPyBeautyppMNRwmi || fProcess == kPyBeautyJets) {
1047 TParticle *partCheck;
1049 Bool_t theQ=kFALSE,theQbar=kFALSE,inYcut=kFALSE;
1050 Bool_t theChild=kFALSE;
1052 Int_t pdg,mpdg,mpdgUpperFamily;
1053 for(i=0; i<np; i++) {
1054 partCheck = (TParticle*)fParticles.At(i);
1055 pdg = partCheck->GetPdgCode();
1056 if(TMath::Abs(pdg) == fFlavorSelect) { // quark
1057 if(pdg>0) { theQ=kTRUE; } else { theQbar=kTRUE; }
1058 y = 0.5*TMath::Log((partCheck->Energy()+partCheck->Pz()+1.e-13)/
1059 (partCheck->Energy()-partCheck->Pz()+1.e-13));
1060 if(y>fYMin && y<fYMax) inYcut=kTRUE;
1062 if(fCutOnChild && TMath::Abs(pdg) == fPdgCodeParticleforAcceptanceCut) {
1063 Int_t mi = partCheck->GetFirstMother() - 1;
1065 mother = (TParticle*)fParticles.At(mi);
1066 mpdg=TMath::Abs(mother->GetPdgCode());
1067 mpdgUpperFamily=(mpdg>1000 ? mpdg+1000 : mpdg+100); // keep e from c from b
1068 if ( ParentSelected(mpdg) ||
1069 (fFlavorSelect==5 && ParentSelected(mpdgUpperFamily))) {
1070 if (KinematicSelection(partCheck,1)) {
1076 if (!theQ || !theQbar || !inYcut) { // one of the c/b conditions not satisfied
1080 if (fCutOnChild && !theChild) { // one of the child conditions not satisfied
1087 //Introducing child cuts in case kPyW, kPyZ, kPyMb, and kPyMbNonDiff
1088 if ( (fProcess == kPyW ||
1090 fProcess == kPyMbDefault ||
1091 fProcess == kPyMb ||
1092 fProcess == kPyMbAtlasTuneMC09 ||
1093 fProcess == kPyMbWithDirectPhoton ||
1094 fProcess == kPyMbNonDiffr)
1095 && (fCutOnChild == 1) ) {
1096 if ( !CheckKinematicsOnChild() ) {
1103 for (i = 0; i < np; i++) {
1105 TParticle * iparticle = (TParticle *) fParticles.At(i);
1106 kf = CheckPDGCode(iparticle->GetPdgCode());
1107 Int_t ks = iparticle->GetStatusCode();
1108 Int_t km = iparticle->GetFirstMother();
1109 if ((ks == 1 && kf!=0 && KinematicSelection(iparticle, 0)) ||
1111 ((fProcess == kPyJets || fProcess == kPyBeautyJets) && ks == 21 && km == 0 && i>1)) {
1113 if (ks == 1) trackIt = 1;
1114 Int_t ipa = iparticle->GetFirstMother()-1;
1116 iparent = (ipa > -1) ? pParent[ipa] : -1;
1119 // store track information
1120 p[0] = iparticle->Px();
1121 p[1] = iparticle->Py();
1122 p[2] = iparticle->Pz();
1123 p[3] = iparticle->Energy();
1126 origin[0] = fVertex[0]+iparticle->Vx()/10; // [cm]
1127 origin[1] = fVertex[1]+iparticle->Vy()/10; // [cm]
1128 origin[2] = fVertex[2]+iparticle->Vz()/10; // [cm]
1130 Float_t tof = fEventTime + kconv * iparticle->T();
1132 PushTrack(fTrackIt*trackIt, iparent, kf,
1133 p[0], p[1], p[2], p[3],
1134 origin[0], origin[1], origin[2], tof,
1135 polar[0], polar[1], polar[2],
1136 kPPrimary, nt, 1., ks);
1140 SetHighWaterMark(nt);
1142 } // select particle
1151 void AliGenPythia::FinishRun()
1153 // Print x-section summary
1162 printf("\nTotal number of Pyevnt() calls %d\n", fTrialsRun);
1163 printf("\nMean Q, x1, x2: %f %f %f\n", fQ, fX1, fX2);
1166 void AliGenPythia::AdjustWeights() const
1168 // Adjust the weights after generation of all events
1172 Int_t ntrack=gAlice->GetMCApp()->GetNtrack();
1173 for (Int_t i=0; i<ntrack; i++) {
1174 part= gAlice->GetMCApp()->Particle(i);
1175 part->SetWeight(part->GetWeight()*fKineBias);
1180 void AliGenPythia::SetNuclei(Int_t a1, Int_t a2, Int_t pdfset)
1182 // Treat protons as inside nuclei with mass numbers a1 and a2
1186 fNucPdf = pdfset; // 0 EKS98 1 EPS08
1191 void AliGenPythia::MakeHeader()
1194 // Make header for the simulated event
1197 if (gAlice->GetEvNumber()>=fDebugEventFirst &&
1198 gAlice->GetEvNumber()<=fDebugEventLast) fPythia->Pylist(2);
1201 // Builds the event header, to be called after each event
1202 if (fHeader) delete fHeader;
1203 fHeader = new AliGenPythiaEventHeader("Pythia");
1206 ((AliGenPythiaEventHeader*) fHeader)->SetProcessType(fPythia->GetMSTI(1));
1209 ((AliGenPythiaEventHeader*) fHeader)->SetTrials(fTrials);
1212 fHeader->SetPrimaryVertex(fVertex);
1215 // Number of primaries
1216 fHeader->SetNProduced(fNprimaries);
1218 // Jets that have triggered
1220 //Need to store jets for b-jet studies too!
1221 if (fProcess == kPyJets || fProcess == kPyDirectGamma || fProcess == kPyBeautyJets || fProcess == kPyBeautyppMNRwmi)
1224 Float_t jets[4][10];
1225 GetJets(njet, ntrig, jets);
1228 for (Int_t i = 0; i < ntrig; i++) {
1229 ((AliGenPythiaEventHeader*) fHeader)->AddJet(jets[0][i], jets[1][i], jets[2][i],
1234 // Copy relevant information from external header, if present.
1239 AliGenPythiaEventHeader* exHeader = (AliGenPythiaEventHeader*) (fRL->GetHeader()->GenEventHeader());
1240 for (Int_t i = 0; i < exHeader->NTriggerJets(); i++)
1242 printf("Adding Jet %d %d \n", i, exHeader->NTriggerJets());
1245 exHeader->TriggerJet(i, uqJet);
1246 ((AliGenPythiaEventHeader*) fHeader)->AddUQJet(uqJet[0], uqJet[1], uqJet[2], uqJet[3]);
1250 // Store quenching parameters
1257 fPythia->GetQuenchingParameters(xp, yp, z);
1258 } else if (fQuench == 2){
1260 Double_t r1 = PARIMP.rb1;
1261 Double_t r2 = PARIMP.rb2;
1262 Double_t b = PARIMP.b1;
1263 Double_t r = 0.5 * TMath::Sqrt(2. * (r1 * r1 + r2 * r2) - b * b);
1264 Double_t phi = PARIMP.psib1;
1265 xp = r * TMath::Cos(phi);
1266 yp = r * TMath::Sin(phi);
1268 } else if (fQuench == 4) {
1272 AliFastGlauber::Instance()->GetSavedXY(xy);
1273 AliFastGlauber::Instance()->GetSavedI0I1(i0i1);
1276 ((AliGenPythiaEventHeader*) fHeader)->SetImpactParameter(fImpact);
1279 ((AliGenPythiaEventHeader*) fHeader)->SetXYJet(xp, yp);
1280 ((AliGenPythiaEventHeader*) fHeader)->SetZQuench(z);
1284 ((AliGenPythiaEventHeader*) fHeader)->SetPtHard(fPythia->GetVINT(47));
1292 Bool_t AliGenPythia::CheckTrigger(TParticle* jet1, TParticle* jet2)
1294 // Check the kinematic trigger condition
1297 eta[0] = jet1->Eta();
1298 eta[1] = jet2->Eta();
1300 phi[0] = jet1->Phi();
1301 phi[1] = jet2->Phi();
1303 pdg[0] = jet1->GetPdgCode();
1304 pdg[1] = jet2->GetPdgCode();
1305 Bool_t triggered = kFALSE;
1307 if (fProcess == kPyJets || fProcess == kPyBeautyJets || fProcess == kPyBeautyppMNRwmi) {
1310 Float_t jets[4][10];
1312 // Use Pythia clustering on parton level to determine jet axis
1314 GetJets(njets, ntrig, jets);
1316 if (ntrig || fEtMinJet == 0.) triggered = kTRUE;
1321 if (pdg[0] == kGamma) {
1325 //Check eta range first...
1326 if ((eta[ij] < fEtaMaxJet && eta[ij] > fEtaMinJet) &&
1327 (eta[ig] < fEtaMaxGamma && eta[ig] > fEtaMinGamma))
1329 //Eta is okay, now check phi range
1330 if ((phi[ij] < fPhiMaxJet && phi[ij] > fPhiMinJet) &&
1331 (phi[ig] < fPhiMaxGamma && phi[ig] > fPhiMinGamma))
1342 Bool_t AliGenPythia::CheckKinematicsOnChild(){
1344 //Checking Kinematics on Child (status code 1, particle code ?, kin cuts
1346 Bool_t checking = kFALSE;
1347 Int_t j, kcode, ks, km;
1348 Int_t nPartAcc = 0; //number of particles in the acceptance range
1349 Int_t numberOfAcceptedParticles = 1;
1350 if (fNumberOfAcceptedParticles != 0) { numberOfAcceptedParticles = fNumberOfAcceptedParticles; }
1351 Int_t npart = fParticles.GetEntriesFast();
1353 for (j = 0; j<npart; j++) {
1354 TParticle * jparticle = (TParticle *) fParticles.At(j);
1355 kcode = TMath::Abs( CheckPDGCode(jparticle->GetPdgCode()) );
1356 ks = jparticle->GetStatusCode();
1357 km = jparticle->GetFirstMother();
1359 if( (ks == 1) && (kcode == fPdgCodeParticleforAcceptanceCut) && (KinematicSelection(jparticle,1)) ){
1362 if( numberOfAcceptedParticles <= nPartAcc){
1371 void AliGenPythia::LoadEvent(AliStack* stack, Int_t flag, Int_t reHadr)
1374 // Load event into Pythia Common Block
1377 Int_t npart = stack -> GetNprimary();
1381 (fPythia->GetPyjets())->N = npart;
1383 n0 = (fPythia->GetPyjets())->N;
1384 (fPythia->GetPyjets())->N = n0 + npart;
1388 for (Int_t part = 0; part < npart; part++) {
1389 TParticle *mPart = stack->Particle(part);
1391 Int_t kf = mPart->GetPdgCode();
1392 Int_t ks = mPart->GetStatusCode();
1393 Int_t idf = mPart->GetFirstDaughter();
1394 Int_t idl = mPart->GetLastDaughter();
1397 if (ks == 11 || ks == 12) {
1404 Float_t px = mPart->Px();
1405 Float_t py = mPart->Py();
1406 Float_t pz = mPart->Pz();
1407 Float_t e = mPart->Energy();
1408 Float_t m = mPart->GetCalcMass();
1411 (fPythia->GetPyjets())->P[0][part+n0] = px;
1412 (fPythia->GetPyjets())->P[1][part+n0] = py;
1413 (fPythia->GetPyjets())->P[2][part+n0] = pz;
1414 (fPythia->GetPyjets())->P[3][part+n0] = e;
1415 (fPythia->GetPyjets())->P[4][part+n0] = m;
1417 (fPythia->GetPyjets())->K[1][part+n0] = kf;
1418 (fPythia->GetPyjets())->K[0][part+n0] = ks;
1419 (fPythia->GetPyjets())->K[3][part+n0] = idf + 1;
1420 (fPythia->GetPyjets())->K[4][part+n0] = idl + 1;
1421 (fPythia->GetPyjets())->K[2][part+n0] = mPart->GetFirstMother() + 1;
1425 void AliGenPythia::LoadEvent(TObjArray* stack, Int_t flag, Int_t reHadr)
1428 // Load event into Pythia Common Block
1431 Int_t npart = stack -> GetEntries();
1435 (fPythia->GetPyjets())->N = npart;
1437 n0 = (fPythia->GetPyjets())->N;
1438 (fPythia->GetPyjets())->N = n0 + npart;
1442 for (Int_t part = 0; part < npart; part++) {
1443 TParticle *mPart = dynamic_cast<TParticle *>(stack->At(part));
1444 Int_t kf = mPart->GetPdgCode();
1445 Int_t ks = mPart->GetStatusCode();
1446 Int_t idf = mPart->GetFirstDaughter();
1447 Int_t idl = mPart->GetLastDaughter();
1450 if (ks == 11 || ks == 12) {
1457 Float_t px = mPart->Px();
1458 Float_t py = mPart->Py();
1459 Float_t pz = mPart->Pz();
1460 Float_t e = mPart->Energy();
1461 Float_t m = mPart->GetCalcMass();
1464 (fPythia->GetPyjets())->P[0][part+n0] = px;
1465 (fPythia->GetPyjets())->P[1][part+n0] = py;
1466 (fPythia->GetPyjets())->P[2][part+n0] = pz;
1467 (fPythia->GetPyjets())->P[3][part+n0] = e;
1468 (fPythia->GetPyjets())->P[4][part+n0] = m;
1470 (fPythia->GetPyjets())->K[1][part+n0] = kf;
1471 (fPythia->GetPyjets())->K[0][part+n0] = ks;
1472 (fPythia->GetPyjets())->K[3][part+n0] = idf + 1;
1473 (fPythia->GetPyjets())->K[4][part+n0] = idl + 1;
1474 (fPythia->GetPyjets())->K[2][part+n0] = mPart->GetFirstMother() + 1;
1479 void AliGenPythia::RecJetsUA1(Int_t& njets, Float_t jets [4][50])
1482 // Calls the Pythia jet finding algorithm to find jets in the current event
1487 Int_t n = fPythia->GetN();
1491 fPythia->Pycell(njets);
1493 for (i = 0; i < njets; i++) {
1494 Float_t px = (fPythia->GetPyjets())->P[0][n+i];
1495 Float_t py = (fPythia->GetPyjets())->P[1][n+i];
1496 Float_t pz = (fPythia->GetPyjets())->P[2][n+i];
1497 Float_t e = (fPythia->GetPyjets())->P[3][n+i];
1508 void AliGenPythia::GetJets(Int_t& nJets, Int_t& nJetsTrig, Float_t jets[4][10])
1511 // Calls the Pythia clustering algorithm to find jets in the current event
1513 Int_t n = fPythia->GetN();
1516 if (fJetReconstruction == kCluster) {
1518 // Configure cluster algorithm
1520 fPythia->SetPARU(43, 2.);
1521 fPythia->SetMSTU(41, 1);
1523 // Call cluster algorithm
1525 fPythia->Pyclus(nJets);
1527 // Loading jets from common block
1533 fPythia->Pycell(nJets);
1537 for (i = 0; i < nJets; i++) {
1538 Float_t px = (fPythia->GetPyjets())->P[0][n+i];
1539 Float_t py = (fPythia->GetPyjets())->P[1][n+i];
1540 Float_t pz = (fPythia->GetPyjets())->P[2][n+i];
1541 Float_t e = (fPythia->GetPyjets())->P[3][n+i];
1542 Float_t pt = TMath::Sqrt(px * px + py * py);
1543 Float_t phi = TMath::Pi() + TMath::ATan2(-py, -px);
1544 Float_t theta = TMath::ATan2(pt,pz);
1545 Float_t et = e * TMath::Sin(theta);
1546 Float_t eta = -TMath::Log(TMath::Tan(theta / 2.));
1548 eta > fEtaMinJet && eta < fEtaMaxJet &&
1549 phi > fPhiMinJet && phi < fPhiMaxJet &&
1550 et > fEtMinJet && et < fEtMaxJet
1553 jets[0][nJetsTrig] = px;
1554 jets[1][nJetsTrig] = py;
1555 jets[2][nJetsTrig] = pz;
1556 jets[3][nJetsTrig] = e;
1558 // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg);
1560 // printf("\n........-Jet #%d: %10.3f %10.3f %10.3f %10.3f \n", i, pt, et, eta, phi * kRaddeg);
1565 void AliGenPythia::GetSubEventTime()
1567 // Calculates time of the next subevent
1570 TArrayF &array = *fEventsTime;
1571 fEventTime = array[fCurSubEvent++];
1573 // printf(" Event time: %d %f %p",fCurSubEvent,fEventTime,fEventsTime);
1577 Bool_t AliGenPythia::IsInEMCAL(Float_t phi, Float_t eta)
1579 // Is particle in EMCAL acceptance?
1580 // phi in degrees, etamin=-etamax
1581 if(phi > fEMCALMinPhi && phi < fEMCALMaxPhi &&
1588 Bool_t AliGenPythia::IsInPHOS(Float_t phi, Float_t eta)
1590 // Is particle in PHOS acceptance?
1591 // Acceptance slightly larger considered.
1592 // phi in degrees, etamin=-etamax
1593 if(phi > fPHOSMinPhi && phi < fPHOSMaxPhi &&
1600 void AliGenPythia::RotatePhi(Int_t iphcand, Bool_t& okdd)
1602 //calculate the new position random between fPHOSMinPhi and fPHOSMaxPhi
1603 Double_t phiPHOSmin = TMath::Pi()*fPHOSMinPhi/180;
1604 Double_t phiPHOSmax = TMath::Pi()*fPHOSMaxPhi/180;
1605 Double_t phiPHOS = gRandom->Uniform(phiPHOSmin,phiPHOSmax);
1607 //calculate deltaphi
1608 TParticle* ph = (TParticle *) fParticles.At(iphcand);
1609 Double_t phphi = ph->Phi();
1610 Double_t deltaphi = phiPHOS - phphi;
1614 //loop for all particles and produce the phi rotation
1615 Int_t np = (fHadronisation) ? fParticles.GetEntriesFast() : fNpartons;
1616 Double_t oldphi, newphi;
1617 Double_t newVx, newVy, R, Vz, time;
1618 Double_t newPx, newPy, pt, Pz, e;
1619 for(Int_t i=0; i< np; i++) {
1620 TParticle* iparticle = (TParticle *) fParticles.At(i);
1621 oldphi = iparticle->Phi();
1622 newphi = oldphi + deltaphi;
1623 if(newphi < 0) newphi = 2*TMath::Pi() + newphi; // correct angle
1624 if(newphi > 2*TMath::Pi()) newphi = newphi - 2*TMath::Pi(); // correct angle
1627 newVx = R*TMath::Cos(newphi);
1628 newVy = R*TMath::Sin(newphi);
1629 Vz = iparticle->Vz(); // don't transform
1630 time = iparticle->T(); // don't transform
1632 pt = iparticle->Pt();
1633 newPx = pt*TMath::Cos(newphi);
1634 newPy = pt*TMath::Sin(newphi);
1635 Pz = iparticle->Pz(); // don't transform
1636 e = iparticle->Energy(); // don't transform
1639 iparticle->SetProductionVertex(newVx, newVy, Vz, time);
1640 iparticle->SetMomentum(newPx, newPy, Pz, e);
1642 } //end particle loop
1644 // now let's check that we put correctly the candidate photon in PHOS
1645 Float_t phi = ph->Phi()*180./TMath::Pi(); //Convert to degrees
1646 Float_t eta =TMath::Abs(ph->Eta());//in calos etamin=-etamax
1647 if(IsInPHOS(phi,eta))
1653 void AliGenPythia::Streamer(TBuffer &R__b)
1655 // Stream an object of class AliGenPythia.
1657 if (R__b.IsReading()) {
1658 Version_t R__v = R__b.ReadVersion(); if (R__v) { }
1659 AliGenerator::Streamer(R__b);
1660 R__b >> (Int_t&)fProcess;
1661 R__b >> (Int_t&)fStrucFunc;
1662 R__b >> (Int_t&)fForceDecay;
1666 fParentSelect.Streamer(R__b);
1667 fChildSelect.Streamer(R__b);
1669 // (AliPythia::Instance())->Streamer(R__b);
1672 // if (fDecayer) fDecayer->Streamer(R__b);
1674 R__b.WriteVersion(AliGenPythia::IsA());
1675 AliGenerator::Streamer(R__b);
1676 R__b << (Int_t)fProcess;
1677 R__b << (Int_t)fStrucFunc;
1678 R__b << (Int_t)fForceDecay;
1682 fParentSelect.Streamer(R__b);
1683 fChildSelect.Streamer(R__b);
1688 // fDecayer->Streamer(R__b);