PWG3/vertexingHF/AliAnalysisTaskSEDplus.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-2008, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  11  * appear in the supporting documentation. The authors make no claims     *
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  13  * provided "as is" without express or implied warranty.                  *
  14  **************************************************************************/
  15
  16 /////////////////////////////////////////////////////////////
  17 //
  18 // AliAnalysisTaskSE for the extraction of signal(e.g D+) of heavy flavor
  19 // decay candidates with the MC truth.
  20 // Author: Renu Bala, bala@to.infn.it
  21 /////////////////////////////////////////////////////////////
  22
  23 #include <TClonesArray.h>
  24 #include <TNtuple.h>
  25 #include <TList.h>
  26 #include <TString.h>
  27 #include <TH1F.h>
  28 #include "AliAODEvent.h"
  29 #include "AliAODVertex.h"
  30 #include "AliAODTrack.h"
  31 #include "AliAODMCHeader.h"
  32 #include "AliAODMCParticle.h"
  33 #include "AliAODRecoDecayHF3Prong.h"
  34 #include "AliAnalysisVertexingHF.h"
  35 #include "AliAnalysisTaskSE.h"
  36 #include "AliAnalysisTaskSEDplus.h"
  37
  38 ClassImp(AliAnalysisTaskSEDplus)
  39
  40
  41 //________________________________________________________________________
  42 AliAnalysisTaskSEDplus::AliAnalysisTaskSEDplus():
  43 AliAnalysisTaskSE(),
  44 fOutput(0),
  45 fNtupleDplus(0),
  46 fNtupleDplusbackg(0),
  47 fFillNtuple(kFALSE),
  48 fVHF(0)
  49 {
  50   // Default constructor
  51 }
  52
  53 //________________________________________________________________________
  54 AliAnalysisTaskSEDplus::AliAnalysisTaskSEDplus(const char *name,Bool_t fillNtuple):
  55 AliAnalysisTaskSE(name),
  56 fOutput(0),
  57 fNtupleDplus(0),
  58 fNtupleDplusbackg(0),
  59 fFillNtuple(fillNtuple),
  60 fVHF(0)
  61 {
  62   // Default constructor
  63
  64   // Output slot #1 writes into a TList container
  65   DefineOutput(1,TList::Class());  //My private output
  66
  67   if(fFillNtuple){
  68     // Output slot #2 writes into a TNtuple container
  69     DefineOutput(2,TNtuple::Class());  //My private output
  70     // Output slot #3 writes into a TNtuple container
  71     DefineOutput(3,TNtuple::Class());  //My private output
  72   }
  73 }
  74
  75 //________________________________________________________________________
  76 AliAnalysisTaskSEDplus::~AliAnalysisTaskSEDplus()
  77 {
  78   // Destructor
  79   if (fOutput) {
  80     delete fOutput;
  81     fOutput = 0;
  82   }
  83   if (fVHF) {
  84     delete fVHF;
  85     fVHF = 0;
  86   }
  87 }
  88
  89 //________________________________________________________________________
  90 void AliAnalysisTaskSEDplus::Init()
  91 {
  92   // Initialization
  93
  94   if(fDebug > 1) printf("AnalysisTaskSEDplus::Init() \n");
  95
  96   gROOT->LoadMacro("ConfigVertexingHF.C");
  97
  98   fVHF = (AliAnalysisVertexingHF*)gROOT->ProcessLine("ConfigVertexingHF()");
  99   fVHF->PrintStatus();
 100
 101   return;
 102 }
 103
 104 //________________________________________________________________________
 105 void AliAnalysisTaskSEDplus::UserCreateOutputObjects()
 106 {
 107   // Create the output container
 108   //
 109   if(fDebug > 1) printf("AnalysisTaskSEDplus::UserCreateOutputObjects() \n");
 110
 111   // Several histograms are more conveniently managed in a TList
 112   fOutput = new TList();
 113   fOutput->SetOwner();
 114   fOutput->SetName("OutputHistos");
 115
 116   Int_t nPtBins=4;
 117   TString hisname;
 118   for(Int_t i=0;i<nPtBins;i++){
 119     hisname.Form("hMassPt%d",i);
 120     TH1F* hm=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 121     hm->Sumw2();
 122     hisname.Form("hSigPt%d",i);
 123     TH1F* hs=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 124     hs->Sumw2();
 125     hisname.Form("hBkgPt%d",i);
 126     TH1F* hb=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 127     hb->Sumw2();
 128
 129     hisname.Form("hMassPt%dTC",i);
 130     TH1F* hmtc=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 131     hmtc->Sumw2();
 132     hisname.Form("hSigPt%dTC",i);
 133     TH1F* hstc=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 134     hstc->Sumw2();
 135     hisname.Form("hBkgPt%dTC",i);
 136     TH1F* hbtc=new TH1F(hisname.Data(),hisname.Data(),100,1.765,1.965);
 137     hbtc->Sumw2();
 138
 139
 140     fOutput->Add(hm);
 141     fOutput->Add(hs);
 142     fOutput->Add(hb);
 143     fOutput->Add(hmtc);
 144     fOutput->Add(hstc);
 145     fOutput->Add(hbtc);
 146   }
 147
 148
 149   if(fFillNtuple){
 150     OpenFile(2); // 2 is the slot number of the ntuple
 151     fNtupleDplus = new TNtuple("fNtupleDplus","D +","pdg:Px:Py:Pz:Ptpi:PtK:Ptpi2:PtRec:PtTrue:PointingAngle:DecLeng:VxTrue:VxRec:VyRec:VzRec:InvMass:sigvert:d0Pi:d0K:d0Pi2");
 152     OpenFile(3); // 3 is the slot number of the ntuple
 153     fNtupleDplusbackg = new TNtuple("fNtupleDplusbackg","D + backg","Ptpibkg:Ptkbkg:Ptpi2bkg:PtRecbkg:PointingAnglebkg:DLbkg:VxRecbkg:VyRecbkg:VzRecbkg:InvMassbkg:sigvertbkg:d0Pibkg:d0Kbkg:d0Pi2bkg");
 154   }
 155
 156   return;
 157 }
 158
 159 //________________________________________________________________________
 160 void AliAnalysisTaskSEDplus::UserExec(Option_t */*option*/)
 161 {
 162   // Execute analysis for current event:
 163   // heavy flavor candidates association to MC truth
 164
 165
 166
 167   AliAODEvent *aod = dynamic_cast<AliAODEvent*> (InputEvent());
 168
 169   // load Dplus->Kpipi candidates
 170   TClonesArray *array3Prong =
 171     (TClonesArray*)aod->GetList()->FindObject("Charm3Prong");
 172   if(!array3Prong) {
 173     printf("AliAnalysisTaskSEDplus::UserExec: Charm3Prong branch not found!\n");
 174     return;
 175   }
 176
 177   // AOD primary vertex
 178   AliAODVertex *vtx1 = (AliAODVertex*)aod->GetPrimaryVertex();
 179   //    vtx1->Print();
 180
 181   // load MC particles
 182   TClonesArray *arrayMC =
 183     (TClonesArray*)aod->GetList()->FindObject(AliAODMCParticle::StdBranchName());
 184   if(!arrayMC) {
 185     printf("AliAnalysisTaskSEDplus::UserExec: MC particles branch not found!\n");
 186     return;
 187   }
 188
 189   // load MC header
 190   AliAODMCHeader *mcHeader =
 191     (AliAODMCHeader*)aod->GetList()->FindObject(AliAODMCHeader::StdBranchName());
 192   if(!mcHeader) {
 193     printf("AliAnalysisTaskSEDplus::UserExec: MC header branch not found!\n");
 194     return;
 195   }
 196   Int_t n3Prong = array3Prong->GetEntriesFast();
 197   if(fDebug>1) printf("Number of D+->Kpipi: %d\n",n3Prong);
 198
 199
 200   Int_t pdgDgDplustoKpipi[3]={321,211,211};
 201   Double_t cutsDplus[12]={0.2,0.4,0.4,0.,0.,0.01,0.06,0.02,0.,0.85,0.,10000000000.};
 202   for (Int_t i3Prong = 0; i3Prong < n3Prong; i3Prong++) {
 203     AliAODRecoDecayHF3Prong *d = (AliAODRecoDecayHF3Prong*)array3Prong->UncheckedAt(i3Prong);
 204
 205
 206     Bool_t unsetvtx=kFALSE;
 207     if(!d->GetOwnPrimaryVtx()){
 208       d->SetOwnPrimaryVtx(vtx1);
 209       unsetvtx=kTRUE;
 210     }
 211     if(d->SelectDplus(fVHF->GetDplusCuts())) {
 212       Int_t iPtBin=0;
 213       Double_t ptCand = d->Pt();
 214       if(ptCand<2.){
 215         iPtBin=0;
 216         cutsDplus[7]=0.08;
 217         cutsDplus[8]=0.5;
 218         cutsDplus[10]=0.979;
 219       }
 220       else if(ptCand>2. && ptCand<3){
 221         iPtBin=1;
 222         cutsDplus[7]=0.08;
 223         cutsDplus[8]=0.5;
 224         cutsDplus[9]=0.991;
 225       }else if(ptCand>3. && ptCand<5){
 226         iPtBin=2;
 227         cutsDplus[7]=0.1;
 228         cutsDplus[8]=0.5;
 229         cutsDplus[9]=0.9955;
 230       }else{
 231         iPtBin=3;
 232         cutsDplus[7]=0.1;
 233         cutsDplus[8]=0.5;
 234         cutsDplus[9]=0.997;
 235       }
 236       Bool_t passTightCuts=d->SelectDplus(cutsDplus);
 237       Int_t labDp = d->MatchToMC(411,arrayMC,3,pdgDgDplustoKpipi);
 238       Double_t invMass=d->InvMassDplus();
 239
 240       TString hisNameA(Form("hMassPt%d",iPtBin));
 241       TString hisNameS(Form("hSigPt%d",iPtBin));
 242       TString hisNameB(Form("hBkgPt%d",iPtBin));
 243       TString hisNameATC(Form("hMassPt%dTC",iPtBin));
 244       TString hisNameSTC(Form("hSigPt%dTC",iPtBin));
 245       TString hisNameBTC(Form("hBkgPt%dTC",iPtBin));
 246
 247       ((TH1F*)(fOutput->FindObject(hisNameA)))->Fill(invMass);
 248       if(passTightCuts){
 249         ((TH1F*)(fOutput->FindObject(hisNameATC)))->Fill(invMass);
 250       }
 251
 252
 253       if(labDp>=0) {
 254         ((TH1F*)(fOutput->FindObject(hisNameS)))->Fill(invMass);
 255         if(passTightCuts){
 256           ((TH1F*)(fOutput->FindObject(hisNameSTC)))->Fill(invMass);
 257         }
 258         if(fFillNtuple){
 259           AliAODMCParticle *partDp = (AliAODMCParticle*)arrayMC->At(labDp);
 260           AliAODMCParticle *dg0 = (AliAODMCParticle*)arrayMC->At(partDp->GetDaughter(0));
 261           Float_t tmp[20];
 262           tmp[0]=TMath::Abs(partDp->GetPdgCode());
 263           tmp[1]=partDp->Px()-d->Px();
 264           tmp[2]=partDp->Py()-d->Py();
 265           tmp[3]=partDp->Pz()-d->Pz();
 266           tmp[4]=d->PtProng(0);
 267           tmp[5]=d->PtProng(1);
 268           tmp[6]=d->PtProng(2);
 269           tmp[7]=d->Pt();
 270           tmp[8]=partDp->Pt();
 271           tmp[9]=d->CosPointingAngle();
 272           tmp[10]=d->DecayLength();
 273           tmp[11]=dg0->Xv();
 274           tmp[12]=d->Xv();
 275           tmp[13]=d->Yv();
 276           tmp[14]=d->Zv();
 277           tmp[15]=d->InvMassDplus();
 278           tmp[16]=d->GetSigmaVert();
 279           tmp[17]=d->Getd0Prong(0);
 280           tmp[18]=d->Getd0Prong(1);
 281           tmp[19]=d->Getd0Prong(2);
 282           fNtupleDplus->Fill(tmp);
 283           PostData(2,fNtupleDplus);
 284         }
 285       }else{
 286         ((TH1F*)(fOutput->FindObject(hisNameB)))->Fill(invMass);
 287         if(passTightCuts){
 288           ((TH1F*)(fOutput->FindObject(hisNameBTC)))->Fill(invMass);
 289         }
 290         if(fFillNtuple){
 291           Float_t tmpbkg[14];
 292           tmpbkg[0]=d->PtProng(0);
 293           tmpbkg[1]=d->PtProng(1);
 294           tmpbkg[2]=d->PtProng(2);
 295           tmpbkg[3]=d->Pt();
 296           tmpbkg[4]=d->CosPointingAngle();
 297           tmpbkg[5]=d->DecayLength();
 298           tmpbkg[6]=d->Xv();
 299           tmpbkg[7]=d->Yv();
 300           tmpbkg[8]=d->Zv();
 301           tmpbkg[9]=d->InvMassDplus();
 302           tmpbkg[10]=d->GetSigmaVert();
 303           tmpbkg[11]=d->Getd0Prong(0);
 304           tmpbkg[12]=d->Getd0Prong(1);
 305           tmpbkg[13]=d->Getd0Prong(2);
 306           fNtupleDplusbackg->Fill(tmpbkg);
 307           PostData(3,fNtupleDplusbackg);
 308         }
 309       }
 310       PostData(1,fOutput);
 311     }
 312     if(unsetvtx) d->UnsetOwnPrimaryVtx();
 313   }
 314
 315   return;
 316 }
 317
 318 //________________________________________________________________________
 319 void AliAnalysisTaskSEDplus::Terminate(Option_t */*option*/)
 320 {
 321   // Terminate analysis
 322   //
 323   if(fDebug > 1) printf("AnalysisTaskSEDplus: Terminate() \n");
 324
 325   fOutput = dynamic_cast<TList*> (GetOutputData(1));
 326   if (!fOutput) {
 327     printf("ERROR: fOutput not available\n");
 328     return;
 329   }
 330
 331   if(fFillNtuple){
 332     fNtupleDplus = dynamic_cast<TNtuple*>(GetOutputData(2));
 333     fNtupleDplusbackg = dynamic_cast<TNtuple*>(GetOutputData(3));
 334   }
 335
 336   return;
 337 }
 338