PWG3/vertexingHF/AliAnalysisTaskSECompareHF.cxx

   1 /**************************************************************************
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   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  15
  16 /////////////////////////////////////////////////////////////
  17 //
  18 // AliAnalysisTaskSE for the comparison of heavy flavor
  19 // decay candidates with the MC truth.
  20 //
  21 // Author: A.Dainese, andrea.dainese@lnl.infn.it
  22 /////////////////////////////////////////////////////////////
  23
  24 #include <TClonesArray.h>
  25 #include <TNtuple.h>
  26 #include <TList.h>
  27 #include <TH1F.h>
  28
  29 #include "AliAnalysisManager.h"
  30 #include "AliAODHandler.h"
  31 #include "AliAODEvent.h"
  32 #include "AliAODVertex.h"
  33 #include "AliESDtrack.h"
  34 #include "AliAODTrack.h"
  35 #include "AliAODMCHeader.h"
  36 #include "AliAODMCParticle.h"
  37 #include "AliAODRecoDecayHF2Prong.h"
  38 #include "AliAODRecoCascadeHF.h"
  39 #include "AliAnalysisVertexingHF.h"
  40 #include "AliAnalysisTaskSE.h"
  41 #include "AliAnalysisTaskSECompareHF.h"
  42
  43 ClassImp(AliAnalysisTaskSECompareHF)
  44
  45
  46 //________________________________________________________________________
  47 AliAnalysisTaskSECompareHF::AliAnalysisTaskSECompareHF():
  48 AliAnalysisTaskSE(),
  49 fOutput(0),
  50 fNtupleCmp(0),
  51 fHistMass(0),
  52 fHistNEvents(0),
  53 fVHF(0)
  54 {
  55   // Default constructor
  56
  57   // NO DefineOutput() HERE (ONLY IN STANDARD CONSTRUCTOR)
  58 }
  59
  60 //________________________________________________________________________
  61 AliAnalysisTaskSECompareHF::AliAnalysisTaskSECompareHF(const char *name):
  62 AliAnalysisTaskSE(name),
  63 fOutput(0),
  64 fNtupleCmp(0),
  65 fHistMass(0),
  66 fHistNEvents(0),
  67 fVHF(0)
  68 {
  69   // Standard constructor
  70
  71   // Output slot #1 writes into a TList container
  72   DefineOutput(1,TList::Class());  //My private output
  73   // Output slot #2 writes into a TNtuple container
  74   DefineOutput(2,TNtuple::Class());  //My private output
  75 }
  76
  77 //________________________________________________________________________
  78 AliAnalysisTaskSECompareHF::~AliAnalysisTaskSECompareHF()
  79 {
  80   // Destructor
  81   if (fOutput) {
  82     delete fOutput;
  83     fOutput = 0;
  84   }
  85   if (fVHF) {
  86     delete fVHF;
  87     fVHF = 0;
  88   }
  89 }
  90
  91 //________________________________________________________________________
  92 void AliAnalysisTaskSECompareHF::Init()
  93 {
  94   // Initialization
  95
  96   if(fDebug > 1) printf("AnalysisTaskSECompareHF::Init() \n");
  97
  98   gROOT->LoadMacro("ConfigVertexingHF.C");
  99
 100   fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
 101   fVHF->PrintStatus();
 102
 103   return;
 104 }
 105
 106 //________________________________________________________________________
 107 void AliAnalysisTaskSECompareHF::UserCreateOutputObjects()
 108 {
 109   // Create the output container
 110   //
 111   if(fDebug > 1) printf("AnalysisTaskSECompareHF::UserCreateOutputObjects() \n");
 112
 113   // Several histograms are more conveniently managed in a TList
 114   fOutput = new TList();
 115   fOutput->SetOwner();
 116
 117   fHistMass = new TH1F("fHistMass", "D^{0} invariant mass; M [GeV]; Entries",200,1.765,1.965);
 118   fHistMass->Sumw2();
 119   fHistMass->SetMinimum(0);
 120   fOutput->Add(fHistMass);
 121
 122   fHistNEvents = new TH1F("fHistNEvents", "Number of processed events; ; Events",3,-1.5,1.5);
 123   fHistNEvents->Sumw2();
 124   fHistNEvents->SetMinimum(0);
 125   fOutput->Add(fHistNEvents);
 126
 127   OpenFile(2); // 2 is the slot number of the ntuple
 128   fNtupleCmp = new TNtuple("fNtupleCmp","Charm comparison","pdg:nprongs:VxRec:VxTrue:ErrVx:VyRec:VyTrue:ErrVy:VzRec:VzTrue:ErrVz:Chi2toNDF:PtRec:Mrec:CPta:Prodd0");
 129
 130   return;
 131 }
 132
 133 //________________________________________________________________________
 134 void AliAnalysisTaskSECompareHF::UserExec(Option_t */*option*/)
 135 {
 136   // Execute analysis for current event:
 137   // heavy flavor candidates association to MC truth
 138
 139
 140   AliAODEvent *aod = dynamic_cast<AliAODEvent*> (InputEvent());
 141
 142   TClonesArray *inputArrayVertices = 0;
 143   TClonesArray *inputArrayD0toKpi = 0;
 144   TClonesArray *inputArrayDstar = 0;
 145
 146   if(!aod && AODEvent() && IsStandardAOD()) {
 147     // In case there is an AOD handler writing a standard AOD, use the AOD
 148     // event in memory rather than the input (ESD) event.
 149     aod = dynamic_cast<AliAODEvent*> (AODEvent());
 150     // in this case the braches in the deltaAOD (AliAOD.VertexingHF.root)
 151     // have to taken from the AOD event hold by the AliAODExtension
 152     AliAODHandler* aodHandler = (AliAODHandler*)
 153       ((AliAnalysisManager::GetAnalysisManager())->GetOutputEventHandler());
 154     if(aodHandler->GetExtensions()) {
 155       AliAODExtension *ext = (AliAODExtension*)aodHandler->GetExtensions()->FindObject("AliAOD.VertexingHF.root");
 156       AliAODEvent *aodFromExt = ext->GetAOD();
 157       // load HF vertices
 158       inputArrayVertices = (TClonesArray*)aodFromExt->GetList()->FindObject("VerticesHF");
 159       // load D0->Kpi candidates
 160       inputArrayD0toKpi = (TClonesArray*)aodFromExt->GetList()->FindObject("D0toKpi");
 161       // load D*+ candidates
 162       inputArrayDstar = (TClonesArray*)aodFromExt->GetList()->FindObject("Dstar");
 163     }
 164   } else {
 165     // load HF vertices
 166     inputArrayVertices = (TClonesArray*)aod->GetList()->FindObject("VerticesHF");
 167     // load D0->Kpi candidates
 168     inputArrayD0toKpi = (TClonesArray*)aod->GetList()->FindObject("D0toKpi");
 169     // load D*+ candidates
 170     inputArrayDstar = (TClonesArray*)aod->GetList()->FindObject("Dstar");
 171   }
 172
 173
 174   if(!inputArrayVertices) {
 175     printf("AliAnalysisTaskSECompareHF::UserExec: Vertices branch not found!\n");
 176     return;
 177   }
 178   if(!inputArrayD0toKpi) {
 179     printf("AliAnalysisTaskSECompareHF::UserExec: D0toKpi branch not found!\n");
 180     return;
 181   }
 182   if(!inputArrayDstar) {
 183     printf("AliAnalysisTaskSECompareHF::UserExec: Dstar branch not found!\n");
 184     return;
 185   }
 186
 187
 188   fHistNEvents->Fill(0); // count event
 189   // Post the data already here
 190   PostData(1,fOutput);
 191
 192   // AOD primary vertex
 193   AliAODVertex *vtx1 = (AliAODVertex*)aod->GetPrimaryVertex();
 194   //vtx1->Print();
 195
 196   // load MC particles
 197   TClonesArray *mcArray =
 198     (TClonesArray*)aod->GetList()->FindObject(AliAODMCParticle::StdBranchName());
 199   if(!mcArray) {
 200     printf("AliAnalysisTaskSECompareHF::UserExec: MC particles branch not found!\n");
 201     return;
 202   }
 203
 204   // load MC header
 205   AliAODMCHeader *mcHeader =
 206     (AliAODMCHeader*)aod->GetList()->FindObject(AliAODMCHeader::StdBranchName());
 207   if(!mcHeader) {
 208     printf("AliAnalysisTaskSECompareHF::UserExec: MC header branch not found!\n");
 209     return;
 210   }
 211
 212   Int_t nprongs,lab,okD0,okD0bar,pdg;
 213   Bool_t unsetvtx;
 214   Double_t invmass,posRec[3],posTrue[3],covRec[6],errx,erry,errz;
 215   AliAODRecoDecayHF2Prong *d2=0;
 216   AliAODRecoDecayHF3Prong *d3=0;
 217   AliAODRecoDecayHF4Prong *d4=0;
 218
 219   Int_t pdgDgD0toKpi[2]={321,211};
 220   Int_t pdgDgDplustoKpipi[3]={321,211,211};
 221   Int_t pdgDgD0toKpipipi[4]={321,211,211,211};
 222
 223   // loop over vertices
 224   Int_t nVertices = inputArrayVertices->GetEntriesFast();
 225   if(fDebug>1) printf("Number of vertices: %d\n",nVertices);
 226
 227   for (Int_t iVtx = 0; iVtx < nVertices; iVtx++) {
 228     AliAODVertex *vtx = (AliAODVertex*)inputArrayVertices->UncheckedAt(iVtx);
 229
 230     vtx->GetXYZ(posRec);
 231     vtx->GetCovarianceMatrix(covRec);
 232     errx=1.; erry=1.; errz=1.;
 233     if(covRec[0]>0) errx = TMath::Sqrt(covRec[0]);
 234     if(covRec[2]>0) erry = TMath::Sqrt(covRec[2]);
 235     if(covRec[5]>0) errz = TMath::Sqrt(covRec[5]);
 236
 237
 238     // get parent AliAODRecoDecayHF
 239     nprongs= vtx->GetNDaughters();
 240     // check that the daughters have kITSrefit and kTPCrefit
 241     Bool_t allDgOK=kTRUE;
 242     for(Int_t idg=0; idg<nprongs; idg++) {
 243       AliAODTrack *track = (AliAODTrack*)vtx->GetDaughter(idg);
 244       if(!(track->GetStatus()&AliESDtrack::kITSrefit)) allDgOK=kFALSE;
 245       if(!(track->GetStatus()&AliESDtrack::kTPCrefit)) allDgOK=kFALSE;
 246     }
 247     if(!allDgOK) continue;
 248
 249
 250     switch(nprongs) {
 251     case 2: // look for D0->Kpi
 252       d2 = (AliAODRecoDecayHF2Prong*)vtx->GetParent();
 253       if(d2->IsLikeSign()) continue;
 254       if(d2->Charge() != 0) continue; // these are D*
 255       lab = d2->MatchToMC(421,mcArray,2,pdgDgD0toKpi);
 256       if(lab>=0) {
 257         unsetvtx=kFALSE;
 258         if(!d2->GetOwnPrimaryVtx()) {
 259           d2->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
 260           unsetvtx=kTRUE;
 261         }
 262         okD0=0; okD0bar=0;
 263         if(d2->SelectD0(fVHF->GetD0toKpiCuts(),okD0,okD0bar)) { // beware: cuts may bias the resolution!
 264           AliAODMCParticle *dMC = (AliAODMCParticle*)mcArray->At(lab);
 265           pdg = dMC->GetPdgCode();
 266           invmass = (pdg==421 ? d2->InvMassD0() : d2->InvMassD0bar());
 267           // get a daughter for true pos of decay vertex
 268           AliAODMCParticle *dg0MC = (AliAODMCParticle*)mcArray->At(dMC->GetDaughter(0));
 269           dg0MC->XvYvZv(posTrue);
 270           fHistMass->Fill(invmass);
 271           // Post the data already here
 272           PostData(1,fOutput);
 273           Float_t tmp[16]={(Float_t)pdg,(Float_t)nprongs,
 274                            (Float_t)posRec[0],(Float_t)posTrue[0],(Float_t)errx,
 275                            (Float_t)posRec[1],(Float_t)posTrue[1],(Float_t)erry,
 276                            (Float_t)posRec[2],(Float_t)posTrue[2],(Float_t)errz,
 277                            (Float_t)d2->GetReducedChi2(),(Float_t)d2->Pt(),(Float_t)invmass,
 278                            (Float_t)d2->CosPointingAngle(),(Float_t)d2->Prodd0d0()};
 279           fNtupleCmp->Fill(tmp);
 280           PostData(2,fNtupleCmp);
 281         }
 282         if(unsetvtx) d2->UnsetOwnPrimaryVtx();
 283       }
 284       break;
 285     case 3: // look for D+
 286       d3 = (AliAODRecoDecayHF3Prong*)vtx->GetParent();
 287       if(d3->IsLikeSign()) continue;
 288       lab = d3->MatchToMC(411,mcArray,3,pdgDgDplustoKpipi);
 289       if(lab>=0) {
 290         unsetvtx=kFALSE;
 291         if(!d3->GetOwnPrimaryVtx()) {
 292           d3->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
 293           unsetvtx=kTRUE;
 294         }
 295         //if(d3->SelectDplus(fVHF->GetDplusCuts())) {
 296         AliAODMCParticle *dMC = (AliAODMCParticle*)mcArray->At(lab);
 297         pdg = dMC->GetPdgCode();
 298         invmass = d3->InvMassDplus();
 299         // get a daughter for true pos of decay vertex
 300         AliAODMCParticle *dg0MC = (AliAODMCParticle*)mcArray->At(dMC->GetDaughter(0));
 301         dg0MC->XvYvZv(posTrue);
 302         Float_t tmp[16]={(Float_t)pdg,(Float_t)nprongs,
 303                          (Float_t)posRec[0],(Float_t)posTrue[0],(Float_t)errx,
 304                          (Float_t)posRec[1],(Float_t)posTrue[1],(Float_t)erry,
 305                          (Float_t)posRec[2],(Float_t)posTrue[2],(Float_t)errz,
 306                          (Float_t)d3->GetReducedChi2(),(Float_t)d3->Pt(),(Float_t)invmass,
 307                          (Float_t)d3->CosPointingAngle(),(Float_t)(d3->Getd0Prong(0)*d3->Getd0Prong(1)*d3->Getd0Prong(2))};
 308         fNtupleCmp->Fill(tmp);
 309         PostData(2,fNtupleCmp);
 310         //}
 311         if(unsetvtx) d3->UnsetOwnPrimaryVtx();
 312       }
 313       break;
 314     case 4: // look for D0->Kpipipi
 315       d4 = (AliAODRecoDecayHF4Prong*)vtx->GetParent();
 316       if(d4->IsLikeSign()) continue;
 317       lab = d4->MatchToMC(421,mcArray,4,pdgDgD0toKpipipi);
 318       if(lab>=0) {
 319         unsetvtx=kFALSE;
 320         if(!d4->GetOwnPrimaryVtx()) {
 321           d4->SetOwnPrimaryVtx(vtx1); // needed to compute all variables
 322           unsetvtx=kTRUE;
 323         }
 324         okD0=0; okD0bar=0;
 325         //if(d4->SelectD0(fVHF->GetD0to4ProngsCuts(),okD0,okD0bar)) {
 326         AliAODMCParticle *dMC = (AliAODMCParticle*)mcArray->At(lab);
 327         pdg = dMC->GetPdgCode();
 328         //invmass = (pdg==421 ? d->InvMassD0() : d->InvMassD0bar());
 329         invmass = 10.;    // dummy
 330         // get a daughter for true pos of decay vertex
 331         AliAODMCParticle *dg0MC = (AliAODMCParticle*)mcArray->At(dMC->GetDaughter(0));
 332         dg0MC->XvYvZv(posTrue);
 333         Float_t tmp[16]={(Float_t)pdg,(Float_t)nprongs,
 334                          (Float_t)posRec[0],(Float_t)posTrue[0],(Float_t)errx,
 335                          (Float_t)posRec[1],(Float_t)posTrue[1],(Float_t)erry,
 336                          (Float_t)posRec[2],(Float_t)posTrue[2],(Float_t)errz,
 337                          (Float_t)d4->GetReducedChi2(),(Float_t)d4->Pt(),(Float_t)invmass,
 338                          (Float_t)d4->CosPointingAngle(),(Float_t)(d4->Getd0Prong(0)*d4->Getd0Prong(1)*d4->Getd0Prong(2)*d4->Getd0Prong(3))};
 339         fNtupleCmp->Fill(tmp);
 340         PostData(2,fNtupleCmp);
 341         //}
 342         if(unsetvtx) d4->UnsetOwnPrimaryVtx();
 343       }
 344       break;
 345     }
 346
 347   } // end loop on vertices
 348
 349
 350   // loop over D*+ candidates
 351   /*
 352   for (Int_t iDstar = 0; iDstar < inputArrayDstar->GetEntries(); iDstar++) {
 353     AliAODRecoCascadeHF *c = (AliAODRecoCascadeHF*)inputArrayDstar->UncheckedAt(iDstar);
 354     Int_t labDstar = c->MatchToMC(413,421,mcArray);
 355     if(labDstar>=0) printf("GOOD MATCH FOR D*+\n");
 356   }
 357   */
 358
 359   // Post the data already here
 360   PostData(1,fOutput);
 361   PostData(2,fNtupleCmp);
 362
 363   return;
 364 }
 365 //________________________________________________________________________
 366 void AliAnalysisTaskSECompareHF::Terminate(Option_t */*option*/)
 367 {
 368   // Terminate analysis
 369   //
 370   if(fDebug > 1) printf("AnalysisTaskSECompareHF: Terminate() \n");
 371
 372   fOutput = dynamic_cast<TList*> (GetOutputData(1));
 373   if (!fOutput) {
 374     printf("ERROR: fOutput not available\n");
 375     return;
 376   }
 377
 378   fHistMass = dynamic_cast<TH1F*>(fOutput->FindObject("fHistMass"));
 379   fHistNEvents = dynamic_cast<TH1F*>(fOutput->FindObject("fHistNEvents"));
 380
 381   //fNtupleCmp = dynamic_cast<TNtuple*> (GetOutputData(2));
 382
 383   return;
 384 }
 385