PWGCF/Correlations/Base/AliAnalysisTaskCFTree.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 // Analysis task to produce trees of lightweight events
  17 // evgeny.kryshen@cern.ch
  18
  19 // aliroot
  20 #include "AliAnalysisTaskCFTree.h"
  21 #include "AliCFParticle.h"
  22 #include "AliAnalysisManager.h"
  23 #include "AliInputEventHandler.h"
  24 #include "AliESDEvent.h"
  25 #include "AliAODEvent.h"
  26 #include "AliMCEvent.h"
  27 #include "AliHeader.h"
  28 #include "AliESDHeader.h"
  29 #include "AliAODHeader.h"
  30 #include "AliAODMCHeader.h"
  31 #include "AliGenEventHeader.h"
  32 #include "AliGenCocktailEventHeader.h"
  33 #include "AliAODTrack.h"
  34 #include "AliESDtrack.h"
  35 #include "AliMCParticle.h"
  36 #include "AliAODMCParticle.h"
  37 #include "AliExternalTrackParam.h"
  38 #include "AliCentrality.h"
  39 #include "AliAnalysisFilter.h"
  40 #include "AliPIDResponse.h"
  41 #include "AliTPCPIDResponse.h"
  42 #include "AliAODTracklets.h"
  43 // root
  44 #include "TMath.h"
  45 #include "TFile.h"
  46 #include "TList.h"
  47 #include "TH1I.h"
  48 #include "TChain.h"
  49 #include "TTree.h"
  50 #include "TClonesArray.h"
  51 ClassImp(AliAnalysisTaskCFTree)
  52
  53 //-----------------------------------------------------------------------------
  54 AliAnalysisTaskCFTree::AliAnalysisTaskCFTree(const char* name) :
  55   AliAnalysisTask(name,""),
  56   fDebug(0),
  57   fMode(0),
  58   fIsAOD(1),
  59   fInputHandler(0x0),
  60   fMcHandler(0x0),
  61   fTrackFilter(0x0),
  62   fHybridConstrainedMask(0),
  63   fTPConlyConstrainedMask(0),
  64   fPIDResponse(0x0),
  65   fListOfHistos(0x0),
  66   fEventStatistics(0x0),
  67   fTree(0x0),
  68   fParticles(0x0),
  69   fTracklets(0x0),
  70   fMuons(0x0),
  71   fField(0),
  72   fCentrality(0),
  73   fZvtx(0),
  74   fRunNumber(0),
  75   fPeriod(0),
  76   fOrbit(),
  77   fBc(),
  78   fSelectMask(0),
  79   fSelectBit(AliVEvent::kMB),
  80   fZVertexCut(10.),
  81   fnTracksVertex(1),
  82   fCentralityMethod("V0M"),
  83   fTrackFilterBit(0xffffffff),
  84   fTrackEtaCut(1.0),
  85   fPtMin(0.15),
  86   fSharedClusterCut(0.4),
  87   fCrossedRowsCut(100),
  88   fFoundFractionCut(0.8),
  89   fStoreTracks(0),
  90   fStoreTracklets(0),
  91   fStoreMuons(0)
  92 {
  93   Info("AliAnalysisTaskCFTree","Calling Constructor");
  94   DefineInput(0,TChain::Class());
  95   DefineOutput(0,TList::Class());
  96   DefineOutput(1,TTree::Class());
  97 }
  98 //-----------------------------------------------------------------------------
  99
 100
 101 //-----------------------------------------------------------------------------
 102 void AliAnalysisTaskCFTree::ConnectInputData(Option_t* /*option*/){
 103   fInputHandler = dynamic_cast<AliInputEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetInputEventHandler());
 104   fMcHandler    = dynamic_cast<AliInputEventHandler*> (AliAnalysisManager::GetAnalysisManager()->GetMCtruthEventHandler());
 105   fInputHandler->SetNeedField();
 106 }
 107 //-----------------------------------------------------------------------------
 108
 109
 110 //-----------------------------------------------------------------------------
 111 void AliAnalysisTaskCFTree::CreateOutputObjects(){
 112   fListOfHistos = new TList();
 113   fListOfHistos->SetOwner();
 114   fEventStatistics = new TH1I("fEventStatistics","",10,0,10);
 115   fEventStatistics->SetBit(TH1::kCanRebin);
 116
 117   fListOfHistos->Add(fEventStatistics);
 118
 119   if (fStoreTracks)    fParticles = new TClonesArray("AliCFParticle",2000);
 120   if (fStoreTracklets) fTracklets = new TClonesArray("AliCFParticle",100);
 121   if (fStoreMuons)     fMuons     = new TClonesArray("AliCFParticle",100);
 122   // create file-resident tree
 123   TDirectory *owd = gDirectory;
 124   OpenFile(1);
 125   fTree = new TTree("events","events");
 126   owd->cd();
 127   fTree->Branch("cent",&fCentrality);
 128   fTree->Branch("zvtx",&fZvtx);
 129   fTree->Branch("field",&fField);
 130   fTree->Branch("run",&fRunNumber);
 131   fTree->Branch("period",&fPeriod);
 132   fTree->Branch("orbit",&fOrbit);
 133   fTree->Branch("bc",&fBc);
 134   fTree->Branch("mask",&fSelectMask);
 135   if (fStoreTracks)    fTree->Branch("particles",&fParticles);
 136   if (fStoreTracklets) fTree->Branch("tracklets",&fTracklets);
 137   if (fStoreMuons)     fTree->Branch("muons",&fMuons);
 138   PostData(0,fListOfHistos);
 139   PostData(1,fTree);
 140 }
 141 //-----------------------------------------------------------------------------
 142
 143
 144 //-----------------------------------------------------------------------------
 145 void AliAnalysisTaskCFTree::Exec(Option_t *){
 146   if (fParticles) fParticles->Clear();
 147   if (fTracklets) fTracklets->Clear();
 148   if (fMuons)     fMuons->Clear();
 149
 150   fEventStatistics->Fill("before cuts",1);
 151
 152   AliVEvent* event = fInputHandler->GetEvent();
 153   if (!event) return;
 154   fEventStatistics->Fill("after event check",1);
 155
 156   fPIDResponse = fInputHandler->GetPIDResponse();
 157
 158   fSelectMask = fInputHandler->IsEventSelected();
 159   if (!(fSelectMask & fSelectBit)) return;
 160   fEventStatistics->Fill("after trigger selection",1);
 161   fRunNumber  = event->GetRunNumber();
 162   fPeriod     = event->GetPeriodNumber();
 163   fOrbit      = event->GetOrbitNumber();
 164   fBc         = event->GetBunchCrossNumber();
 165   fField      = event->GetMagneticField();
 166   fCentrality = event->GetCentrality()->GetCentralityPercentile(fCentralityMethod);
 167
 168   if (fMode==0){ // Data analysis
 169     const AliVVertex* vertex  = event->GetPrimaryVertex();
 170     if (!vertex) return;
 171     fZvtx  = vertex->GetZ();
 172     TString name(vertex->GetName());
 173     if (name.CompareTo("PrimaryVertex") && name.CompareTo("SPDVertex")) return; // Reject TPC only vertex
 174     fEventStatistics->Fill("after rejection of TPC only vertex",1);
 175     if (TMath::Abs(fZvtx) >= fZVertexCut || vertex->GetNContributors()<fnTracksVertex)  return;
 176     fEventStatistics->Fill("after vertex selection",1);
 177
 178     if (fParticles) {
 179       for (Int_t ipart=0;ipart<event->GetNumberOfTracks();ipart++){
 180         AliVTrack* track = (AliVTrack*) event->GetTrack(ipart);
 181         if (!track) continue;
 182         UInt_t mask = GetFilterMap(track);
 183         if (!(mask & fTrackFilterBit)) continue;
 184
 185         if (track->InheritsFrom("AliAODTrack")) AddTrack(track,mask,0);
 186         else if (track->InheritsFrom("AliESDtrack")) {
 187           if (mask)                           AddTrack(track,mask,1);
 188           if (mask & fHybridConstrainedMask)  AddTrack(track,mask,2);
 189           if (mask & fTPConlyConstrainedMask) AddTrack(track,mask,3);
 190         }
 191       }
 192     }
 193     if (fIsAOD){
 194       AliAODEvent* aod = (AliAODEvent*) event;
 195
 196       if (fStoreTracklets){
 197         AliAODTracklets* tracklets = aod->GetTracklets();
 198         Int_t nTracklets = tracklets->GetNumberOfTracklets();
 199         for (Int_t i=0;i<nTracklets;i++){
 200           Float_t phi   = tracklets->GetPhi(i);
 201           Float_t theta = tracklets->GetTheta(i);
 202           Float_t dphi  = tracklets->GetDeltaPhi(i);
 203           new ((*fTracklets)[fTracklets->GetEntriesFast()]) AliCFParticle(dphi,-TMath::Log(TMath::Tan(theta/2)),phi,0,0);
 204         }
 205       }
 206
 207       if (fStoreMuons){
 208         for (Int_t iTrack = 0; iTrack < aod->GetNTracks(); iTrack++) {
 209           AliAODTrack* track = aod->GetTrack(iTrack);
 210           if (!track->IsMuonTrack()) continue;
 211           Float_t pt     = track->Pt();
 212           Float_t eta    = track->Eta();
 213           Float_t phi    = track->Phi();
 214           Short_t charge = track->Charge();
 215           Float_t dca    = track->DCA();
 216           Float_t chi2   = track->Chi2perNDF();
 217           Float_t rabs   = track->GetRAtAbsorberEnd();
 218           Int_t   mask   = track->GetMatchTrigger();
 219           if (rabs < 17.6 || rabs > 89.5) continue;
 220           if (eta < -4 || eta > -2.5) continue;
 221           AliCFParticle* part = new ((*fMuons)[fMuons->GetEntriesFast()]) AliCFParticle(pt,eta,phi,charge,mask,3);
 222           part->SetAt(dca,0);
 223           part->SetAt(chi2,1);
 224           part->SetAt(rabs,2);
 225         }
 226       }
 227     }
 228   }
 229
 230   else { // MC analysis
 231     AliMCEvent* mcEvent = fMcHandler ? fMcHandler->MCEvent() : 0;
 232     TClonesArray* mcTracks = dynamic_cast<TClonesArray*>(event->FindListObject(AliAODMCParticle::StdBranchName()));
 233     if (!mcEvent && !mcTracks) { printf("No mc object found\n"); return; }
 234     fEventStatistics->Fill("after mc objects check",1);
 235
 236     Int_t nPrimGen = 0;
 237     Int_t nProduced = 0;
 238     if (mcEvent) { // ESD
 239       AliHeader* header = (AliHeader*) mcEvent->Header();
 240       AliGenCocktailEventHeader* cocktailHeader = dynamic_cast<AliGenCocktailEventHeader*> (header->GenEventHeader());
 241       AliGenEventHeader* mcHeader = dynamic_cast<AliGenEventHeader*> (cocktailHeader ? cocktailHeader->GetHeaders()->First() : header->GenEventHeader());
 242       if (!mcHeader) { printf("mc header not found\n"); return; }
 243       nProduced = mcEvent->GetNumberOfTracks();
 244       nPrimGen = mcHeader->NProduced();
 245       fZvtx = mcEvent->GetPrimaryVertex()->GetZ();
 246     } else { // AOD
 247       AliAODMCHeader* mcHeader = (AliAODMCHeader*) event->FindListObject(AliAODMCHeader::StdBranchName());
 248       if (!mcHeader) { printf("AliAODMCHeader not found\n"); return; }
 249       if (mcHeader->GetCocktailHeaders()) {
 250         nProduced = mcTracks->GetEntriesFast();
 251         AliGenEventHeader* header0 =  mcHeader->GetCocktailHeader(0);
 252         if (!header0) { printf("first header expected but not found\n"); return; }
 253         nPrimGen = header0->NProduced();
 254       } else  nPrimGen = nProduced;
 255       fZvtx = mcHeader->GetVtxZ();
 256     }
 257     fEventStatistics->Fill("after mc header check",1);
 258
 259     if (TMath::Abs(fZvtx)>fZVertexCut) return;
 260     fEventStatistics->Fill("after MC vertex cut",1);
 261
 262     const AliVVertex* vertex = event->GetPrimaryVertex();
 263     if (!vertex) return;
 264     fEventStatistics->Fill("after check for vertex object",1);
 265     TString name(vertex->GetName());
 266     if (name.CompareTo("PrimaryVertex") && name.CompareTo("SPDVertex")) fZvtx=1000; // Reject TPC only vertex
 267     fEventStatistics->Fill("after rejection of TPC only vertex",1);
 268     if (vertex->GetNContributors()<fnTracksVertex)  fZvtx=-1000;
 269     fEventStatistics->Fill("after check for vertex contributors",1);
 270
 271     if (fParticles) {
 272       UInt_t* masks = new UInt_t[nProduced];
 273       for (Int_t i=0;i<nProduced;i++) masks[i]=0;
 274
 275       // Loop over reconstructed tracks to set masks
 276       for (Int_t ipart=0;ipart<event->GetNumberOfTracks();ipart++){
 277         AliVTrack* part = (AliVTrack*) event->GetTrack(ipart);
 278         if (!part) continue;
 279         Int_t label = TMath::Abs(part->GetLabel());
 280         if (label>=nProduced) continue;
 281         masks[label] |= GetFilterMap(part);
 282       }
 283
 284       // Loop over mc tracks to be stored
 285       for (Int_t ipart=0;ipart<nProduced;ipart++){
 286         AliVParticle* part = 0;
 287         Bool_t isPrimary = 0;
 288         if (mcTracks) { // AOD analysis
 289           AliAODMCParticle* particle = (AliAODMCParticle*) mcTracks->At(ipart);
 290           if (!particle) continue;
 291           // skip injected signals
 292           AliAODMCParticle* mother = particle;
 293           while (!mother->IsPrimary()) mother = (AliAODMCParticle*) mcTracks->At(mother->GetMother());
 294           if (mother->GetLabel()>=nPrimGen) continue;
 295           part = particle;
 296           // check for primary
 297           isPrimary = particle->IsPhysicalPrimary();
 298         } else { // ESD analysis
 299           AliMCParticle* particle = (AliMCParticle*) mcEvent->GetTrack(ipart);
 300           if (!particle) continue;
 301           // skip injected signals
 302           AliMCParticle* mother = particle;
 303           while (mother->GetMother()>=0) mother = (AliMCParticle*) mcEvent->GetTrack(mother->GetMother());
 304           if (mother->GetLabel()>=nPrimGen) continue;
 305           part = particle;
 306           // check for primary
 307           isPrimary = mcEvent->IsPhysicalPrimary(ipart);
 308         }
 309
 310         // store only primaries and all reconstructed (non-zero mask)
 311         Int_t mask = masks[ipart];
 312         if (isPrimary) mask |= (1 << 30);
 313         if (!mask) continue;
 314         AddTrack(part,mask);
 315       }
 316       delete[] masks;
 317     }
 318
 319     if (fIsAOD){
 320       AliAODEvent* aod = (AliAODEvent*) event;
 321
 322       if (fStoreTracklets) {
 323         AliAODTracklets* tracklets = aod->GetTracklets();
 324         Int_t nTracklets = tracklets->GetNumberOfTracklets();
 325         for (Int_t i=0;i<nTracklets;i++){
 326           Float_t phi   = tracklets->GetPhi(i);
 327           Float_t theta = tracklets->GetTheta(i);
 328           Float_t dphi  = tracklets->GetDeltaPhi(i);
 329           AliCFParticle* tracklet = new ((*fTracklets)[fTracklets->GetEntriesFast()]) AliCFParticle(dphi,-TMath::Log(TMath::Tan(theta/2)),phi,0,0,4);
 330           Int_t label1 = tracklets->GetLabel(i,0);
 331           Int_t label2 = tracklets->GetLabel(i,1);
 332           if (label1!=label2) continue;
 333           AliAODMCParticle* particle = (AliAODMCParticle*) mcTracks->At(label1);
 334           if (!particle) continue;
 335           Short_t charge = particle->Charge();
 336           Float_t ptMC   = particle->Pt();
 337           Float_t etaMC  = particle->Eta();
 338           Float_t phiMC  = particle->Phi();
 339           Float_t pdg    = particle->PdgCode();
 340           tracklet->SetCharge(charge);
 341           tracklet->SetAt(ptMC,0);
 342           tracklet->SetAt(etaMC,1);
 343           tracklet->SetAt(phiMC,2);
 344           tracklet->SetAt(pdg,3);
 345         }
 346       }
 347
 348       if (fStoreMuons){
 349         for (Int_t iTrack = 0; iTrack < aod->GetNTracks(); iTrack++) {
 350           AliAODTrack* track = aod->GetTrack(iTrack);
 351           if (!track->IsMuonTrack()) continue;
 352           Float_t pt     = track->Pt();
 353           Float_t eta    = track->Eta();
 354           Float_t phi    = track->Phi();
 355           Short_t charge = track->Charge();
 356           Float_t dca    = track->DCA();
 357           Float_t chi2   = track->Chi2perNDF();
 358           Float_t rabs   = track->GetRAtAbsorberEnd();
 359           Int_t   mask   = track->GetMatchTrigger();
 360           if (rabs < 17.6 || rabs > 89.5) continue;
 361           if (eta < -4 || eta > -2.5) continue;
 362           AliCFParticle* part = new ((*fMuons)[fMuons->GetEntriesFast()]) AliCFParticle(pt,eta,phi,charge,mask,3);
 363           part->SetAt(dca,0);
 364           part->SetAt(chi2,1);
 365           part->SetAt(rabs,2);
 366         }
 367       }
 368     }
 369   }
 370   fTree->Fill();
 371   PostData(0,fListOfHistos);
 372   PostData(1,fTree);
 373 }
 374 //-----------------------------------------------------------------------------
 375
 376
 377 //-----------------------------------------------------------------------------
 378 UInt_t AliAnalysisTaskCFTree::GetFilterMap(AliVParticle* particle){
 379   UInt_t mask = 0;
 380   if (particle->InheritsFrom("AliAODTrack")) {
 381     AliAODTrack* part = (AliAODTrack*) particle;
 382     mask = part->GetFilterMap();
 383     Double_t nCrossedRaws      = part->GetTPCNCrossedRows();
 384     Double_t nFindableClusters = part->GetTPCNclsF();
 385     Double_t nSharedClusters   = part->GetTPCnclsS();
 386     Double_t nClusters         = part->GetTPCncls();
 387     Bool_t itsRefit            = part->GetStatus() & AliVTrack::kITSrefit;
 388     if (nCrossedRaws/nFindableClusters > fFoundFractionCut) mask |= (1 << 26);
 389     if (nCrossedRaws>fCrossedRowsCut)                       mask |= (1 << 27);
 390     if (itsRefit)                                           mask |= (1 << 28);
 391     if (nSharedClusters/nClusters<=fSharedClusterCut)       mask |= (1 << 29);
 392     if (part->GetLabel()<0)                                 mask |= (1 << 31);
 393   } else if (particle->InheritsFrom("AliESDtrack")){
 394     AliESDtrack* part = (AliESDtrack*) particle;
 395     if (!fTrackFilter) AliFatal("Track filter undefined");
 396     mask |= fTrackFilter->IsSelected(part);
 397   }
 398
 399   return mask;
 400 }
 401 //-----------------------------------------------------------------------------
 402
 403
 404 //-----------------------------------------------------------------------------
 405 AliCFParticle* AliAnalysisTaskCFTree::AddTrack(AliVParticle* part, UInt_t mask, UInt_t flag){
 406
 407   // skip neutral mc particles
 408   Char_t charge = part->Charge();
 409   if (charge==0) return NULL;
 410
 411   // set pt,eta,phi
 412   Float_t pt=0,eta=0,phi=0;
 413   if (flag==0 || flag==1){ // AOD, MC or Global ESD tracks
 414     pt  = part->Pt();
 415     eta = part->Eta();
 416     phi = part->Phi();
 417     if  (flag==1) mask &= (~fHybridConstrainedMask) & (~fTPConlyConstrainedMask);
 418   }
 419   else if (flag==2) { // Hybrid constrained tracks (ESD)
 420     AliESDtrack* track = (AliESDtrack*) part;
 421     const AliExternalTrackParam* param = track->GetConstrainedParam();
 422     pt  = param->Pt();
 423     eta = param->Eta();
 424     phi = param->Phi();
 425     mask &= fHybridConstrainedMask;
 426   }
 427   else if (flag==3) { // TPC only constrained tracks (ESD)
 428     AliESDtrack* track = (AliESDtrack*) part;
 429     AliESDtrack tpcTrack;
 430     if (!track->FillTPCOnlyTrack(tpcTrack)) return NULL;
 431     AliExternalTrackParam param;
 432     const AliESDVertex* vtxSPD = ((AliESDEvent*) fInputHandler->GetEvent())->GetPrimaryVertexSPD();
 433     if (!tpcTrack.RelateToVertexTPC(vtxSPD,fField,1.e30,&param)) return NULL;
 434     pt  = param.Pt();
 435     eta = param.Eta();
 436     phi = param.Phi();
 437     mask &= fTPConlyConstrainedMask;
 438   }
 439
 440   // kinematic cuts
 441   if (pt < fPtMin || TMath::Abs(eta) > fTrackEtaCut) return NULL;
 442
 443
 444   AliCFParticle* cfpart = new ((*fParticles)[fParticles->GetEntriesFast()]) AliCFParticle(pt,eta,phi,charge,mask,3);
 445
 446   AliVTrack* track = dynamic_cast<AliVTrack*> (part);
 447   if (!track) return cfpart;
 448   Float_t ncl  = track->GetTPCsignalN();
 449   Float_t dedx = track->GetTPCsignalTunedOnData(); if (dedx<=0) dedx = track->GetTPCsignal();
 450   Float_t beta = -99;
 451   if (track->GetStatus()&AliESDtrack::kTOFpid){
 452     Double_t tof[5];
 453     track->GetIntegratedTimes(tof);
 454     beta = tof[0]/track->GetTOFsignal();
 455   }
 456   cfpart->SetAt(ncl,0);
 457   cfpart->SetAt(dedx,1);
 458   cfpart->SetAt(beta,2);
 459   return cfpart;
 460 }