PWG3/vertexingHF/AliCFVertexingHFCascade.cxx

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   3  *                                                                        *
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  15
  16 //-----------------------------------------------------------------------
  17 // Class for HF corrections as a function of many variables and steps
  18 // For D* and other cascades
  19 //
  20 // Author : A.Grelli a.grelli@uu.nl  UTECHT
  21 //-----------------------------------------------------------------------
  22
  23 #include "AliAODRecoDecayHF2Prong.h"
  24 #include "AliAODMCParticle.h"
  25 #include "AliAODEvent.h"
  26 #include "TClonesArray.h"
  27 #include "AliCFVertexingHF.h"
  28 #include "AliESDtrack.h"
  29 #include "TDatabasePDG.h"
  30 #include "AliAODRecoCascadeHF.h"
  31 #include "AliCFVertexingHFCascade.h"
  32 #include "AliCFContainer.h"
  33
  34 ClassImp(AliCFVertexingHFCascade)
  35
  36
  37 //_________________________________________
  38   AliCFVertexingHFCascade::AliCFVertexingHFCascade(TClonesArray *mcArray, UShort_t originDselection):
  39   AliCFVertexingHF(mcArray, originDselection)
  40 {
  41   // standard constructor
  42
  43   SetNProngs(3);
  44   fPtAccCut=new Float_t[fProngs];
  45   fEtaAccCut=new Float_t[fProngs];
  46   // element 0 in the cut arrays corresponds to the soft pion!!!!!!!! Careful when setting the values...
  47   fPtAccCut[0]=0.;
  48   fEtaAccCut[0]=0.;
  49   for(Int_t iP=1; iP<fProngs; iP++){
  50           fPtAccCut[iP]=0.1;
  51           fEtaAccCut[iP]=0.9;
  52   }
  53
  54 }
  55
  56
  57 //_____________________________________
  58 AliCFVertexingHFCascade& AliCFVertexingHFCascade::operator=(const AliCFVertexingHFCascade& c)
  59 {
  60   // operator =
  61
  62   if  (this != &c) {
  63
  64     AliCFVertexingHF::operator=(c);
  65
  66   }
  67   return *this;
  68 }
  69
  70 //__________________________________________
  71 Bool_t AliCFVertexingHFCascade::SetRecoCandidateParam(AliAODRecoDecayHF *recoCand)
  72 {
  73   // set the AliAODRecoDecay candidate
  74
  75   Bool_t bSignAssoc = kFALSE;
  76
  77   fRecoCandidate = recoCand;
  78   AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)recoCand;
  79
  80   if (!fRecoCandidate) {
  81     AliError("fRecoCandidate not found, problem in assignement\n");
  82     return bSignAssoc;
  83   }
  84
  85   if ( fRecoCandidate->GetPrimaryVtx()) AliDebug(3,"fReco Candidate has a pointer to PrimVtx\n");
  86   //if (recoCand->GetPrimaryVtx()) printf("Reco Cand has a pointer to PrimVtx\n");
  87
  88   //Int_t pdgCand = 413;
  89
  90   Int_t pdgDgDStartoD0pi[2]={421,211};
  91   Int_t pdgDgD0toKpi[2]={321,211};
  92
  93   Int_t nentries = fmcArray->GetEntriesFast();
  94
  95   AliDebug(3,Form("nentries = %d\n", nentries));
  96
  97   Int_t mcLabel =  dstarD0pi->MatchToMC(413,421,pdgDgDStartoD0pi,pdgDgD0toKpi,fmcArray);
  98
  99   if (mcLabel == -1) return bSignAssoc;
 100
 101   if ((fRecoCandidate->NumberOfFakeDaughters()>0)&&(fFakeSelection==1)) return bSignAssoc;
 102   if ((fRecoCandidate->NumberOfFakeDaughters()==0)&&(fFakeSelection==2)) return bSignAssoc;
 103
 104   SetMCLabel(mcLabel);
 105   fmcPartCandidate = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fmcLabel));
 106
 107   if (!fmcPartCandidate){
 108     AliDebug(3,"No part candidate");
 109     return bSignAssoc;
 110   }
 111
 112   bSignAssoc = kTRUE;
 113   return bSignAssoc;
 114 }
 115
 116 //______________________________________________
 117 Bool_t AliCFVertexingHFCascade::GetGeneratedValuesFromMCParticle(Double_t* vectorMC)
 118 {
 119   //
 120   // collecting all the necessary info (pt, y, cosThetaStar, ptPi, ptKa, cT) from MC particle
 121   //
 122
 123         Bool_t bGenValues = kFALSE;
 124
 125
 126         Int_t daughter0ds = fmcPartCandidate->GetDaughter(0);
 127         Int_t daughter1ds = fmcPartCandidate->GetDaughter(1);
 128
 129         //the D0
 130         AliAODMCParticle* mcPartDaughterD0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0ds));
 131         AliAODMCParticle* mcPartDaughterPis = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1ds));
 132
 133         Double_t vtx1[3] = {0,0,0};   // primary vertex
 134         Double_t vtx2daughter0[3] = {0,0,0};   // secondary vertex from daughter 0
 135         Double_t vtx2daughter1[3] = {0,0,0};   // secondary vertex from daughter 1
 136         fmcPartCandidate->XvYvZv(vtx1);  // cm
 137
 138         //D0 daughters
 139         Int_t daughter0 = mcPartDaughterD0->GetDaughter(0);
 140         Int_t daughter1 = mcPartDaughterD0->GetDaughter(1);
 141
 142         AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0)); //D0
 143         AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1)); //pis
 144
 145         // getting vertex from daughters
 146         mcPartDaughter0->XvYvZv(vtx2daughter0);  // cm
 147         mcPartDaughter1->XvYvZv(vtx2daughter1);  //cm
 148         if (TMath::Abs(vtx2daughter0[0] - vtx2daughter1[0])>1E-5 || TMath::Abs(vtx2daughter0[1]- vtx2daughter1[1])>1E-5 || TMath::Abs(vtx2daughter0[2] - vtx2daughter1[2])>1E-5) {
 149           AliError("Daughters have different secondary vertex, skipping the track");
 150           return bGenValues;
 151         }
 152
 153         Int_t nprongs = 2;
 154         Short_t charge = 0;
 155         // always instantiate the AliAODRecoDecay with the positive daughter first, the negative second
 156         AliAODMCParticle* positiveDaugh = mcPartDaughter0;
 157         AliAODMCParticle* negativeDaugh = mcPartDaughter1;
 158         if (mcPartDaughter0->GetPdgCode()<0 && mcPartDaughter1->GetPdgCode()>0){
 159                 // inverting in case the positive daughter is the second one
 160                 positiveDaugh = mcPartDaughter1;
 161                 negativeDaugh = mcPartDaughter0;
 162         }
 163         // getting the momentum from the daughters
 164         Double_t px[2] = {positiveDaugh->Px(), negativeDaugh->Px()};
 165         Double_t py[2] = {positiveDaugh->Py(), negativeDaugh->Py()};
 166         Double_t pz[2] = {positiveDaugh->Pz(), negativeDaugh->Pz()};
 167
 168         Double_t d0[2] = {0.,0.};
 169
 170         AliAODRecoDecayHF* decay = new AliAODRecoDecayHF(vtx1,vtx2daughter0,nprongs,charge,px,py,pz,d0);
 171
 172         Double_t cosThetaStar = 0.;
 173         Double_t cosThetaStarD0 = 0.;
 174         Double_t cosThetaStarD0bar = 0.;
 175         cosThetaStarD0 = decay->CosThetaStar(1,421,211,321);
 176         cosThetaStarD0bar = decay->CosThetaStar(0,421,321,211);
 177         if (mcPartDaughterD0->GetPdgCode() == 421){  // D0
 178           AliDebug(3, Form("D0, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
 179           cosThetaStar = cosThetaStarD0;
 180         }
 181         else if (mcPartDaughterD0->GetPdgCode() == -421){  // D0bar{
 182           AliDebug(3, Form("D0bar, with pdgprong0 = %d, pdgprong1 = %d",mcPartDaughter0->GetPdgCode(),mcPartDaughter1->GetPdgCode()));
 183           cosThetaStar = cosThetaStarD0bar;
 184         }
 185         else{
 186           AliWarning("There are problems!! particle was expected to be either a D0 or a D0bar, check...");
 187           return vectorMC;
 188         }
 189         if (cosThetaStar < -1 || cosThetaStar > 1) {
 190           AliWarning("Invalid value for cosine Theta star, returning");
 191           return bGenValues;
 192         }
 193
 194         Double_t vectorD0[2] ={0.,0.};
 195
 196         // evaluate the correct cascade
 197         if (!EvaluateIfD0toKpi(mcPartDaughterD0,vectorD0)) {
 198           AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
 199           return bGenValues;
 200         }
 201
 202         //ct
 203         Double_t cT = decay->Ct(421);
 204         // get the pT of the daughters
 205         Double_t pTD0 = 0.;
 206         Double_t pTpi = 0.;
 207
 208         if (TMath::Abs(fmcPartCandidate->GetPdgCode()) == 413) {
 209                 pTD0 = mcPartDaughterD0->Pt();
 210                 pTpi = mcPartDaughterPis->Pt();
 211         }
 212
 213
 214         vectorMC[0] = fmcPartCandidate->Pt();
 215         vectorMC[1] = fmcPartCandidate->Y() ;
 216         vectorMC[2] = cosThetaStar ;
 217         vectorMC[3] = vectorD0[0];
 218         vectorMC[4] = vectorD0[1];
 219         vectorMC[5] = cT*1.E4 ;  // in micron
 220         vectorMC[6] = 0.;   // dummy value, meaningless in MC
 221         vectorMC[7] = 0.;   // dummy value, meaningless in MC, in micron
 222         vectorMC[8] = 0.;   // dummy value, meaningless in MC, in micron
 223         vectorMC[9] = -100000.; // dummy value, meaningless in MC, in micron^2
 224         vectorMC[10] = 1.01;    // dummy value, meaningless in MC
 225         vectorMC[11] = fmcPartCandidate->Phi();
 226         vectorMC[12] = fzMCVertex;    // z of reconstructed of primary vertex
 227         vectorMC[13] = fCentValue; // reconstructed centrality
 228
 229         delete decay;
 230         bGenValues = kTRUE;
 231         return bGenValues;
 232 }
 233 //____________________________________________
 234 Bool_t AliCFVertexingHFCascade::GetRecoValuesFromCandidate(Double_t *vectorReco) const
 235 {
 236   // read the variables for the container
 237
 238   Bool_t bFillRecoValues=kFALSE;
 239
 240   //Get the D* and the D0 from D*
 241   AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)fRecoCandidate;
 242   AliAODRecoDecayHF2Prong* d0toKpi = (AliAODRecoDecayHF2Prong*)dstarD0pi->Get2Prong();
 243
 244
 245   if (dstarD0pi->GetPrimaryVtx())printf("dstarD0pi has primary vtx\n");
 246   if (fRecoCandidate->GetPrimaryVtx())printf("fRecoCandidateDstar has primary vtx\n");
 247
 248   Double_t pt =  dstarD0pi->Pt();
 249   Double_t rapidity =  dstarD0pi->YDstar();
 250   Double_t invMass=0.;
 251   Double_t cosThetaStar = 9999.;
 252   Double_t pTpi = 0.;
 253   Double_t pTK = 0.;
 254   Double_t dca = d0toKpi->GetDCA();
 255   Double_t d0pi = 0.;
 256   Double_t d0K = 0.;
 257   Double_t d0xd0 = d0toKpi->Prodd0d0();
 258   Double_t cosPointingAngle = d0toKpi->CosPointingAngle();
 259   Double_t phi = dstarD0pi->Phi();
 260
 261   Int_t pdgCode = fmcPartCandidate->GetPdgCode();
 262
 263   if (pdgCode > 0){
 264     cosThetaStar = d0toKpi->CosThetaStarD0();
 265     pTpi = d0toKpi->PtProng(0);
 266     pTK = d0toKpi->PtProng(1);
 267     d0pi = d0toKpi->Getd0Prong(0);
 268     d0K = d0toKpi->Getd0Prong(1);
 269     invMass=d0toKpi->InvMassD0();
 270   }
 271   else {
 272     cosThetaStar = d0toKpi->CosThetaStarD0bar();
 273     pTpi = d0toKpi->PtProng(1);
 274     pTK = d0toKpi->PtProng(0);
 275     d0pi = d0toKpi->Getd0Prong(1);
 276     d0K = d0toKpi->Getd0Prong(0);
 277     invMass= d0toKpi->InvMassD0bar();
 278   }
 279
 280   Double_t cT = d0toKpi->CtD0();
 281
 282   vectorReco[0] = pt;
 283   vectorReco[1] = rapidity;
 284   vectorReco[2] = cosThetaStar;
 285   vectorReco[3] = pTpi;
 286   vectorReco[4] = pTK;
 287   vectorReco[5] = cT*1.E4;  // in micron
 288   vectorReco[6] = dca*1.E4;  // in micron
 289   vectorReco[7] = d0pi*1.E4;  // in micron
 290   vectorReco[8] = d0K*1.E4;  // in micron
 291   vectorReco[9] = d0xd0*1.E8;  // in micron^2
 292   vectorReco[10] = cosPointingAngle;  // in micron
 293   vectorReco[11] = phi;
 294   vectorReco[12] = fzPrimVertex;    // z of reconstructed of primary vertex
 295   vectorReco[13] = fCentValue;
 296
 297   bFillRecoValues = kTRUE;
 298
 299   return bFillRecoValues;
 300 }
 301
 302
 303 //_____________________________________________________________
 304 Bool_t AliCFVertexingHFCascade::CheckMCChannelDecay() const
 305 {
 306   // check the required decay channel
 307
 308   Bool_t checkCD = kFALSE;
 309
 310
 311   Int_t daughter0 = fmcPartCandidate->GetDaughter(0);
 312   Int_t daughter1 = fmcPartCandidate->GetDaughter(1);
 313   AliAODMCParticle* mcPartDaughter0 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter0));
 314   AliAODMCParticle* mcPartDaughter1 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter1));
 315
 316   if (!mcPartDaughter0 || !mcPartDaughter1) {
 317     AliDebug (2,"Problems in the MC Daughters\n");
 318     return checkCD;
 319   }
 320
 321   if (!(TMath::Abs(mcPartDaughter0->GetPdgCode())==421 &&
 322         TMath::Abs(mcPartDaughter1->GetPdgCode())==211) &&
 323       !(TMath::Abs(mcPartDaughter0->GetPdgCode())==211 &&
 324         TMath::Abs(mcPartDaughter1->GetPdgCode())==421)) {
 325     AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");
 326     return checkCD;
 327   }
 328
 329   Double_t vectorD0[2] ={0.,0.};
 330
 331   // D* is a cascade ...evaluate the correct cascade
 332   if (!EvaluateIfD0toKpi(mcPartDaughter0,vectorD0)) {
 333     AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
 334     return checkCD;
 335   }
 336
 337   checkCD = kTRUE;
 338   return checkCD;
 339
 340 }
 341
 342 //__________________________________________
 343 Bool_t AliCFVertexingHFCascade::EvaluateIfD0toKpi(AliAODMCParticle* neutralDaugh, Double_t* vectorD0)const
 344 {
 345   //
 346   // chack wether D0 is decaing into kpi
 347   //
 348
 349   Bool_t isHadronic = kFALSE;
 350
 351   Int_t daughterD00 = neutralDaugh->GetDaughter(0);
 352   Int_t daughterD01 = neutralDaugh->GetDaughter(1);
 353
 354   AliDebug(2, Form("daughter0 = %d and daughter1 = %d",daughterD00,daughterD01));
 355   if (daughterD00 == 0 || daughterD01 == 0) {
 356     AliDebug(2, "Error! the D0 MC doesn't have correct daughters!!");
 357     return isHadronic;
 358   }
 359
 360   if (TMath::Abs(daughterD01 - daughterD00) != 1) { // should be everytime true - see PDGdatabooklet
 361     AliDebug(2, "The D0 MC doesn't come from a 2-prong decay, skipping!!");
 362     return isHadronic;
 363   }
 364
 365   AliAODMCParticle* mcPartDaughterD00 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughterD00));
 366   AliAODMCParticle* mcPartDaughterD01 = dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughterD01));
 367   if (!mcPartDaughterD00 || !mcPartDaughterD01) {
 368     AliWarning("D0 MC analysis: At least one Daughter Particle not found in tree, skipping");
 369     return isHadronic;
 370   }
 371
 372   if (!(TMath::Abs(mcPartDaughterD00->GetPdgCode())==321 &&
 373         TMath::Abs(mcPartDaughterD01->GetPdgCode())==211) &&
 374       !(TMath::Abs(mcPartDaughterD00->GetPdgCode())==211 &&
 375         TMath::Abs(mcPartDaughterD01->GetPdgCode())==321)) {
 376     AliDebug(2, "The D0 MC doesn't come from a Kpi decay, skipping!!");
 377     return isHadronic;
 378   }
 379
 380   Double_t pTD0pi = 0;
 381   Double_t pTD0K = 0;
 382
 383
 384   if (TMath::Abs(mcPartDaughterD00->GetPdgCode()) == 211) {
 385     pTD0pi = mcPartDaughterD00->Pt();
 386     pTD0K = mcPartDaughterD01->Pt();
 387   }
 388   else {
 389     pTD0pi = mcPartDaughterD01->Pt();
 390     pTD0K  = mcPartDaughterD00->Pt();
 391   }
 392
 393   isHadronic = kTRUE;
 394
 395   vectorD0[0] = pTD0pi;
 396   vectorD0[1] = pTD0K;
 397
 398   return isHadronic;
 399
 400 }
 401
 402 //___________________________________________________________
 403
 404 void AliCFVertexingHFCascade::SetPtAccCut(Float_t* ptAccCut)
 405 {
 406         //
 407         // setting the pt cut to be used in the Acceptance steps (MC+Reco)
 408         //
 409
 410         AliInfo("The 3rd element of the pt cut array will correspond to the cut applied to the soft pion - please check that it is correct");
 411         if (fProngs>0){
 412                 for (Int_t iP=0; iP<fProngs; iP++){
 413                         fPtAccCut[iP]=ptAccCut[iP];
 414                 }
 415         }
 416         return;
 417 }
 418
 419
 420
 421 //___________________________________________________________
 422
 423 void AliCFVertexingHFCascade::SetEtaAccCut(Float_t* etaAccCut)
 424 {
 425         //
 426         // setting the eta cut to be used in the Acceptance steps (MC+Reco)
 427         //
 428
 429         AliInfo("The 3rd element of the eta cut array will correspond to the cut applied to the soft pion - please check that it is correct");
 430         if (fProngs>0){
 431                 for (Int_t iP=0; iP<fProngs; iP++){
 432                         fEtaAccCut[iP]=etaAccCut[iP];
 433                 }
 434         }
 435         return;
 436 }
 437 //___________________________________________________________
 438
 439 void AliCFVertexingHFCascade::SetAccCut(Float_t* ptAccCut, Float_t* etaAccCut)
 440 {
 441         //
 442         // setting the pt and eta cut to be used in the Acceptance steps (MC+Reco)
 443         //
 444
 445         AliInfo("The 3rd element of the pt and cut array will correspond to the cut applied to the soft pion - please check that they are correct");
 446         if (fProngs>0){
 447                 for (Int_t iP=0; iP<fProngs; iP++){
 448                         fPtAccCut[iP]=ptAccCut[iP];
 449                         fEtaAccCut[iP]=etaAccCut[iP];
 450                 }
 451         }
 452         return;
 453 }
 454
 455 //___________________________________________________________
 456
 457 void AliCFVertexingHFCascade::SetAccCut()
 458 {
 459         //
 460         // setting the pt and eta cut to be used in the Acceptance steps (MC+Reco)
 461         //
 462
 463   AliAODMCParticle* mcPartDaughter = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fLabelArray[2]));  // should be the soft pion...
 464   if(!mcPartDaughter) return;
 465   Int_t mother =  mcPartDaughter->GetMother();
 466   AliAODMCParticle* mcMother = dynamic_cast<AliAODMCParticle*>(fmcArray->At(mother));
 467   if(!mcMother) return;
 468
 469   if (TMath::Abs(mcPartDaughter->GetPdgCode())!= 211 || TMath::Abs(mcMother->GetPdgCode())!=413){
 470     AliFatal("Apparently the soft pion is not in the third position, causing a crash!!");
 471   }
 472   if (fProngs>0){
 473     for (Int_t iP=0; iP<fProngs-1; iP++){
 474       fPtAccCut[iP]=0.1;
 475       fEtaAccCut[iP]=0.9;
 476     }
 477     fPtAccCut[2]=0.06;  // soft pion
 478     fEtaAccCut[2]=0.9;  // soft pion
 479   }
 480   return;
 481 }
 482
 483 //_____________________________________________________________
 484 Double_t AliCFVertexingHFCascade::GetEtaProng(Int_t iProng) const
 485 {
 486         //
 487         // getting eta of the prong - overload the mother class method
 488         //
 489
 490  if (fRecoCandidate){
 491
 492    AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)fRecoCandidate;
 493
 494    Double_t etaProng =-9999;
 495     if(iProng==0) etaProng =dstarD0pi->Get2Prong()->EtaProng(0);
 496     if(iProng==1) etaProng =dstarD0pi->Get2Prong()->EtaProng(1);
 497     if(iProng==2) etaProng =dstarD0pi->EtaProng(1);
 498
 499     return etaProng;
 500
 501   }
 502   return 999999;
 503 }
 504 //_____________________________________________________________
 505 Double_t AliCFVertexingHFCascade::GetPtProng(Int_t iProng) const
 506 {
 507         //
 508         // getting pt of the prong
 509         //
 510
 511   if (fRecoCandidate){
 512
 513     AliAODRecoCascadeHF* dstarD0pi = (AliAODRecoCascadeHF*)fRecoCandidate;
 514     Double_t ptProng= -9999;
 515     if(iProng==0) ptProng =dstarD0pi->Get2Prong()->PtProng(0);
 516     if(iProng==1) ptProng =dstarD0pi->Get2Prong()->PtProng(1);
 517     if(iProng==2) ptProng =dstarD0pi->PtProng(1);
 518
 519     //  Double_t ptProng = fRecoCandidate->PtProng(iProng);
 520     return ptProng;
 521
 522   }
 523   return 999999;
 524
 525 }