AliCFVertexingHF3Prong.cxx

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/**************************************************************************
 * Copyright(c) 2007-2011, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
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 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

//                                                               //
// Class to compute variables for correction framework           //  
// for 3-body decays of D mesons (D+, Ds, Lc)                    //
// in bins of cut variables                                      //
// Origin:       Francesco Prino (prino@to.infn.it)              //
//               Renu Bala       (bala@to.infn.it)               //
//               Davide Caffarri (cafarri@pd.infn.it)            //

#include "AliAODMCParticle.h"
#include "AliAODEvent.h"
#include "TClonesArray.h"
#include "AliCFVertexingHF.h"
#include "AliESDtrack.h"
#include "TDatabasePDG.h"

#include "AliCFVertexingHF3Prong.h"
#include "AliCFContainer.h"
#include "AliCFTaskVertexingHF.h"

ClassImp(AliCFVertexingHF3Prong);

//_________________________________________
AliCFVertexingHF3Prong::AliCFVertexingHF3Prong(Int_t decay, UInt_t resonantDecay):
AliCFVertexingHF(),
  fDecay(decay),
  fGenDsOption(kCountResonant),
  fResonantDecay(resonantDecay)
 {
  // 
  SetNProngs(3);

  fPtAccCut=new Float_t[fProngs];
  fEtaAccCut=new Float_t[fProngs];
  for(Int_t iP=0; iP<fProngs; iP++){
    fPtAccCut[iP]=0.1;
    fEtaAccCut[iP]=0.9;
  }

}
//_________________________________________
AliCFVertexingHF3Prong::AliCFVertexingHF3Prong(Int_t decay):
AliCFVertexingHF(),
  fDecay(decay),
  fGenDsOption(kCountResonant),
  fResonantDecay(0)
 {
  //
  SetNProngs(3);

  fPtAccCut=new Float_t[fProngs];
  fEtaAccCut=new Float_t[fProngs];
  for(Int_t iP=0; iP<fProngs; iP++){
          fPtAccCut[iP]=0.1;
          fEtaAccCut[iP]=0.9;
  }

}
//_________________________________________
AliCFVertexingHF3Prong::AliCFVertexingHF3Prong(TClonesArray *mcArray, UShort_t originDselection, Int_t decay, UInt_t resonantDecay):
  AliCFVertexingHF(mcArray, originDselection),
  fDecay(decay),
  fGenDsOption(kCountResonant),
  fResonantDecay(resonantDecay)
{
  //
  SetNProngs(3);
  fPtAccCut=new Float_t[fProngs];
  fEtaAccCut=new Float_t[fProngs];
  for(Int_t iP=0; iP<fProngs; iP++){
    fPtAccCut[iP]=0.1;
    fEtaAccCut[iP]=0.9;
  }
}

//_________________________________________
AliCFVertexingHF3Prong::AliCFVertexingHF3Prong(TClonesArray *mcArray, UShort_t originDselection, Int_t decay):
  AliCFVertexingHF(mcArray, originDselection),
  fDecay(decay),
  fGenDsOption(kCountResonant),
  fResonantDecay(0)
{
  //
  SetNProngs(3);
  fPtAccCut=new Float_t[fProngs];
  fEtaAccCut=new Float_t[fProngs];
  for(Int_t iP=0; iP<fProngs; iP++){
          fPtAccCut[iP]=0.1;
          fEtaAccCut[iP]=0.9;
  }
}
//_____________________________________
AliCFVertexingHF3Prong& AliCFVertexingHF3Prong::operator=(const AliCFVertexingHF3Prong& c){
  //
  if  (this != &c) {

    AliCFVertexingHF::operator=(c);
   
  }
    return *this;
}

//__________________________________________
Bool_t AliCFVertexingHF3Prong::SetRecoCandidateParam(AliAODRecoDecayHF *recoCand){
  // Checks if candidate is signal and D meson is present in MC array
  
  Bool_t bSignAssoc = kFALSE;
  fRecoCandidate = recoCand;

  if (!fRecoCandidate) {
    AliError("fRecoCandidate not found, problem in assignement\n");
    return bSignAssoc;
  }
  
  Int_t pdgCand = -1;
  Int_t pdgDaughter[3]={-1,-1,-1};
  if(fDecay==kDplustoKpipi){
    pdgCand=411;
    pdgDaughter[0]=321;
    pdgDaughter[1]=211;
    pdgDaughter[2]=211;
  }else if(fDecay==kDstoKKpi){
    pdgCand=431;
    pdgDaughter[0]=321;
    pdgDaughter[1]=321;
    pdgDaughter[2]=211;
  }else if(fDecay==kLctopKpi){
    pdgCand=4122;
    pdgDaughter[0]=2212;
    pdgDaughter[1]=321;
    pdgDaughter[2]=211;   
  }else{
    AliError("WRONG DECAY SETTING");
    return bSignAssoc;    
  }

  Int_t mcLabel = fRecoCandidate->MatchToMC(pdgCand,fmcArray,3,pdgDaughter);  
  if (mcLabel == -1) return bSignAssoc;

  if (fRecoCandidate->NumberOfFakeDaughters()>0){
    fFake = 0;    // fake candidate
    if (fFakeSelection==1) return bSignAssoc;
  }
  if (fRecoCandidate->NumberOfFakeDaughters()==0){
    fFake = 2;    // non-fake candidate
    if (fFakeSelection==2) return bSignAssoc;
  }
  
  SetMCLabel(mcLabel);
  fmcPartCandidate = dynamic_cast<AliAODMCParticle*>(fmcArray->At(fmcLabel));
    
  if (!fmcPartCandidate){
    AliDebug(3,"No part candidate");
    return bSignAssoc;
  }

  if(fDecay==kDstoKKpi && fGenDsOption!=kCountAllDsKKpi){
    if(!CheckMCChannelDecay()){
      AliDebug(3,"Ds not from the selected resonant channel");
      return bSignAssoc;
    }
  }

  if (fDecay==kLctopKpi && fResonantDecay != AliCFTaskVertexingHF::kAll) {
    if (!CheckLc3Prong()) return bSignAssoc;
  }

  bSignAssoc = kTRUE;
  return bSignAssoc;
}

//______________________________________________
Bool_t AliCFVertexingHF3Prong::GetGeneratedValuesFromMCParticle(Double_t* vectorMC) {
  // 
  // collecting all the necessary info from MC particle and fill vectorMC: 12 variables
  // pt_D
  // y_D
  // phi_D
  // ctau
  // cos point
  // pt_1
  // pt_2
  // pt_3
  // d0_1
  // d0_2
  // d0_3
  // zPrimVert
  // centrality
  
  Bool_t bGenValues = kFALSE;
  
  Int_t pdgCand = -1;
  if(fDecay==kDplustoKpipi){
    pdgCand=411;
  }else if(fDecay==kDstoKKpi){
    pdgCand=431;
  }else if(fDecay==kLctopKpi){
    pdgCand=4122;
  }else{
    AliError("WRONG DECAY SETTING");
    return bGenValues;
  }
  
  Double_t vertD[3] = {0,0,0};   // D origin
  fmcPartCandidate->XvYvZv(vertD);  // cm
  
  Int_t nprongs = 3;
  Int_t daughter[3];
  Short_t charge = fmcPartCandidate->Charge();
  
  // order the daughters as LS,OS,LS, e.g. D+ -> pi+ K- pi+
  // the 2 LS are ordered so that in pos. 0 there is the one with lower label value
  Int_t index=0;
  Int_t nDauLS=0;
  Int_t nDauOS=0;
  
  
  Int_t nDau=fmcPartCandidate->GetNDaughters();
  Int_t labelFirstDau = fmcPartCandidate->GetDaughter(0); 
  if(nDau==3){
    for(Int_t iDau=0; iDau<3; iDau++){
      Int_t ind = labelFirstDau+iDau;
      AliAODMCParticle* part = dynamic_cast<AliAODMCParticle*>(fmcArray->At(ind));
      if(!part){
        AliError("Daughter particle not found in MC array");
        return bGenValues;
      }
      Short_t signDau=part->Charge();
      if(signDau==charge){
        nDauLS++;
        daughter[index] = ind;
        index=2;
      }else{
        daughter[1] = ind;
        nDauOS++;
      }
    }
  }else if(nDau==2){
    for(Int_t iDau=0; iDau<2; iDau++){
      Int_t ind = labelFirstDau+iDau;
      AliAODMCParticle* part = dynamic_cast<AliAODMCParticle*>(fmcArray->At(ind));
      if(!part){
        AliError("Daughter particle not found in MC array");
        return bGenValues;
      }
      Int_t pdgCode=TMath::Abs(part->GetPdgCode());
      if(pdgCode==211 || pdgCode==321 || pdgCode==2212){
        Short_t signDau=part->Charge();
        if(signDau==charge){
          nDauLS++;
          daughter[index] = ind;
          index=2;
        }else{
          daughter[1] = ind;
          nDauOS++;
        }
      }else{
        Int_t nDauRes=part->GetNDaughters();
        if(nDauRes!=2){
          AliError("Wrong resonant decay");
          return bGenValues;
        }
        Int_t labelFirstDauRes = part->GetDaughter(0);  
        for(Int_t iDauRes=0; iDauRes<2; iDauRes++){
          Int_t indDR = labelFirstDauRes+iDauRes;
          AliAODMCParticle* partDR = dynamic_cast<AliAODMCParticle*>(fmcArray->At(indDR));
          if(!partDR){
            AliError("Daughter particle not found in MC array");
            return bGenValues;
          }
          Short_t signDau=partDR->Charge();
          if(signDau==charge){
            nDauLS++;
            daughter[index] = ind;
            index=2;
          }else{
            daughter[1] = ind;
            nDauOS++;
          }
        }
      }
    }
  }else{
    AliError(Form("Wrong number of daughters %d",nDau));
    return bGenValues;
  }
  
  if(nDauLS!=2 || nDauOS!=1){
    AliError(Form("Wrong decay channel: LS and OS daughters not OK: %d %d",nDauLS,nDauOS));
    return bGenValues;
  }
  if(daughter[0]>daughter[2]){
    Int_t tmp=daughter[0];
    daughter[0]=daughter[2];
    daughter[2]=tmp;
  }
  
  // getting the momentum from the daughters and decay vertex
  Double_t px[3],py[3],pz[3],pt[3];
  Double_t vertDec[3] = {0,0,0};   // decay vertex    
  for(Int_t iDau=0; iDau<3; iDau++){
    AliAODMCParticle* part=dynamic_cast<AliAODMCParticle*>(fmcArray->At(daughter[iDau]));
    if(!part){
      AliError("Daughter particle not found in MC array");
      return bGenValues;
    }
    px[iDau]=part->Px();
    py[iDau]=part->Py();
    pz[iDau]=part->Pz();
    pt[iDau]=part->Pt();
    if(iDau==0) part->XvYvZv(vertDec);
  }
  
  Double_t d0[3] = {0.,0.,0.}; // dummy values!!!!
  
  AliAODRecoDecayHF* decay = new AliAODRecoDecayHF(vertD,vertDec,nprongs,charge,px,py,pz,d0);
  Double_t cT = decay->Ct(pdgCand);
  
  switch (fConfiguration){
  case AliCFTaskVertexingHF::kSnail:
    vectorMC[0] = fmcPartCandidate->Pt();
    vectorMC[1] = fmcPartCandidate->Y() ;
    vectorMC[2] = fmcPartCandidate->Phi();
    vectorMC[3] = cT*1.E4 ;  // in micron
    vectorMC[4] = 1.01;    // cos pointing angle, dummy value, meaningless in MC
    vectorMC[5] = pt[0];
    vectorMC[6] = pt[1];
    vectorMC[7] = pt[2];
    vectorMC[8] = fzMCVertex;    // z of reconstructed of primary vertex
    vectorMC[9] = fCentValue; // reconstructed centrality value 
    vectorMC[10] = 1.;           // fake: always filling with 1 at MC level 
    vectorMC[11] = 1.01; // dummy value for cosPointingXY  multiplicity
    vectorMC[12] = 0.; // dummy value for NormalizedDecayLengthXY multiplicity
    vectorMC[13] = fMultiplicity; // reconstructed multiplicity
    
    if (fDecay==kLctopKpi){
      vectorMC[11] = 0.; //dist12
      vectorMC[12] = 0.; //dist23
      vectorMC[13] = 0.; //sigmaVtx
      vectorMC[14] = 0.; //sumd02
      vectorMC[15] = 1.01; // dummy value for cosPointingXY  multiplicity
      vectorMC[16] = 0.; // dummy value for NormalizedDecayLengthXY multiplicity
      vectorMC[17] = fMultiplicity; // reconstructed multiplicity
    }
    break;
    
  case AliCFTaskVertexingHF::kCheetah:
    vectorMC[0] = fmcPartCandidate->Pt();
    vectorMC[1] = fmcPartCandidate->Y() ;
    vectorMC[2] = cT*1.E4; // in micron
    vectorMC[3] = fmcPartCandidate->Phi();
    vectorMC[4] = fzMCVertex;
    vectorMC[5] = fCentValue;   // dummy value for dca, meaningless in MC
    vectorMC[6] = 1. ;  // fake: always filling with 1 at MC level 
    vectorMC[7] = fMultiplicity;   // dummy value for d0pi, meaningless in MC, in micron
    break;
  case AliCFTaskVertexingHF::kFalcon:
    vectorMC[0] = fmcPartCandidate->Pt();
    vectorMC[1] = fmcPartCandidate->Y() ;
    vectorMC[2] = fCentValue;   // dummy value for dca, meaningless in MC
    vectorMC[3] = fMultiplicity;   // dummy value for d0pi, meaningless in MC, in micron
    break;
  }
  delete decay; 
  bGenValues = kTRUE;
  return bGenValues;
}


//____________________________________________
Bool_t AliCFVertexingHF3Prong::GetRecoValuesFromCandidate(Double_t *vectorReco) const
{ 
  // Fill vector (see above) with reconstructed quantities
  Bool_t bFillRecoValues=kFALSE;
  
  Int_t pdgCand = -1;
  if(fDecay==kDplustoKpipi){
    pdgCand=411;
  }else if(fDecay==kDstoKKpi){
    pdgCand=431;
  }else if(fDecay==kLctopKpi){
    pdgCand=4122;
    // AliError("LambdaC not yet implemented");
    // return bFillRecoValues;
  }else{
    AliError("WRONG DECAY SETTING");
    return bFillRecoValues;
  }
  
  AliAODRecoDecayHF3Prong *decay3 = (AliAODRecoDecayHF3Prong*)fRecoCandidate;
  Short_t charge=decay3->Charge();
  Double_t rapidity=decay3->Y(pdgCand);
  Double_t cT=decay3->Ct(pdgCand); 
  Double_t pt = decay3->Pt();
  Double_t cosPointingAngle = decay3->CosPointingAngle();
  Double_t phi = decay3->Phi();
  Double_t dist12= decay3->GetDist12toPrim();
  Double_t dist23 = decay3->GetDist23toPrim();
  Double_t sigmVert = decay3->GetSigmaVert();
  Double_t cosPointingAngleXY = decay3->CosPointingAngleXY();
  Double_t normDecayLengthXY = decay3->NormalizedDecayLengthXY();
    
  Int_t daughtSorted[3];
  Int_t tmpIndex=0;
  Int_t nDauLS=0;
  Int_t nDauOS=0;
  for(Int_t iDau=0; iDau<3; iDau++){
    AliAODTrack *trk = (AliAODTrack*)decay3->GetDaughter(iDau);
    Short_t chargedau=trk->Charge();
    if(chargedau==charge){
      daughtSorted[tmpIndex]=iDau;
      tmpIndex=2;
      nDauLS++;
    }else{
      daughtSorted[1]=iDau;
      nDauOS++;
    }
  }
  
  if(nDauLS!=2 || nDauOS!=1){
    AliError("Wrong decay channel: number of OS and LS tracks not OK");
    return bFillRecoValues;
  }
  
  if(daughtSorted[0]>daughtSorted[2]){
    Int_t tmp=daughtSorted[0];
    daughtSorted[0]=daughtSorted[2];
    daughtSorted[2]=tmp;
  }
  
  
  switch (fConfiguration){
  case AliCFTaskVertexingHF::kSnail:
    vectorReco[0] = pt;
    vectorReco[1] = rapidity;
    vectorReco[2] = phi;
    vectorReco[3] = cT*1.E4;  // in micron
    vectorReco[4] = cosPointingAngle;  // in micron
    vectorReco[5] = decay3->PtProng(daughtSorted[0]);
    vectorReco[6] = decay3->PtProng(daughtSorted[1]);
    vectorReco[7] = decay3->PtProng(daughtSorted[2]);
    vectorReco[8] = fzPrimVertex;    // z of reconstructed of primary vertex
    vectorReco[9] = fCentValue; //reconstructed centrality value
    vectorReco[10] = fFake;      // whether the reconstructed candidate was a fake (fFake = 0) or not (fFake = 2) 
    vectorReco[11] = cosPointingAngleXY; 
    vectorReco[12] = normDecayLengthXY; // in cm
    vectorReco[13] = fMultiplicity; // reconstructed multiplicity
    
    if(fDecay==kLctopKpi){  
            Double_t d0prong0 = decay3->Getd0Prong(daughtSorted[0]);
            Double_t d0prong1 = decay3->Getd0Prong(daughtSorted[1]);
            Double_t d0prong2 = decay3->Getd0Prong(daughtSorted[2]);
      Double_t sumd02 =(d0prong0*d0prong0 + d0prong1*d0prong1 + d0prong2*d0prong2); 
      vectorReco[11] = dist12*1.E4;
      vectorReco[12] = dist23*1.E4;
      vectorReco[13] = sigmVert*1.E4;
      vectorReco[14] = sumd02*1.E8;
      vectorReco[15] = cosPointingAngleXY; 
      vectorReco[16] = normDecayLengthXY; // in cm
      vectorReco[17] = fMultiplicity; // reconstructed multiplicity
    }
    break;
  case AliCFTaskVertexingHF::kCheetah:
    vectorReco[0] = pt;
    vectorReco[1] = rapidity ;
    vectorReco[2] = cT*1.E4; // in micron
    vectorReco[3] = phi; 
    vectorReco[4] = fzPrimVertex;
    vectorReco[5] = fCentValue;   
    vectorReco[6] = fFake ; 
    vectorReco[7] = fMultiplicity;  
    break;
  case AliCFTaskVertexingHF::kFalcon:
    vectorReco[0] = pt;
    vectorReco[1] = rapidity ;
    vectorReco[2] = fCentValue;   
    vectorReco[3] = fMultiplicity;  
    break;
  }

  bFillRecoValues = kTRUE;
  return bFillRecoValues;
}


//_____________________________________________________________
Bool_t AliCFVertexingHF3Prong::CheckMCChannelDecay() const
{ 
  // Check the pdg codes of the daughters
  Bool_t checkCD = kFALSE;

  Int_t pdgCand = -1;
  Int_t pdgDaughter[3]={-1,-1,-1};
  if(fDecay==kDplustoKpipi){
    pdgCand=411;
    pdgDaughter[0]=321;
    pdgDaughter[1]=211;
    pdgDaughter[2]=211;
  }else if(fDecay==kDstoKKpi){
    pdgCand=431;
    pdgDaughter[0]=321;
    pdgDaughter[1]=321;
    pdgDaughter[2]=211;
  }else if(fDecay==kLctopKpi){
    pdgCand=4122;
    pdgDaughter[0]=2212;
    pdgDaughter[1]=321;
    pdgDaughter[2]=211;
    
  //  AliError("LambdaC not yet implemented");
  //  return checkCD;
  }else{
    AliError("WRONG DECAY SETTING");
    return checkCD;    
  }


  Int_t daughter[3];
  Double_t sumPxDau=0.;
  Double_t sumPyDau=0.;
  Double_t sumPzDau=0.;

  Int_t nDau=fmcPartCandidate->GetNDaughters();
  Int_t labelFirstDau = fmcPartCandidate->GetDaughter(0);

  if(fDecay==kLctopKpi && fResonantDecay!=AliCFTaskVertexingHF::kAll){if(!CheckLc3Prong()) return checkCD;}
 
  if(nDau==3){
    if(fDecay==kDstoKKpi && !(fGenDsOption==kCountAllDsKKpi || fGenDsOption==kCountNonResonant)){
      AliDebug(3,"Decay channel in direct KKpi, should be skipped");
      return checkCD;
    }
    for(Int_t iDau=0; iDau<3; iDau++){
      Int_t ind = labelFirstDau+iDau;
      AliAODMCParticle* part = dynamic_cast<AliAODMCParticle*>(fmcArray->At(ind));
      if(!part){
  AliError("Daughter particle not found in MC array");
  return checkCD;
      }
      daughter[iDau]=TMath::Abs(part->GetPdgCode());
      sumPxDau+=part->Px();
      sumPyDau+=part->Py();
      sumPzDau+=part->Pz();
    }
  }else if(nDau==2){
    if(fDecay==kDstoKKpi && fGenDsOption==kCountNonResonant) return checkCD;
    Int_t nDauFound=0;
    for(Int_t iDau=0; iDau<2; iDau++){
      Int_t ind = labelFirstDau+iDau;
      AliAODMCParticle* part = dynamic_cast<AliAODMCParticle*>(fmcArray->At(ind));
      if(!part){
  AliError("Daughter particle not found in MC array");
  return checkCD;
      }
      Int_t pdgCode=TMath::Abs(part->GetPdgCode());
      if(pdgCode==211 || pdgCode==321 || pdgCode==2212){
  if(nDauFound>=3) return checkCD;
  daughter[nDauFound]=pdgCode;
  sumPxDau+=part->Px();
  sumPyDau+=part->Py();
  sumPzDau+=part->Pz();
  nDauFound++;
      }else{
  if(fDecay==kDstoKKpi && fGenDsOption!=3){
    Int_t pdgCodeRes=TMath::Abs(part->GetPdgCode());
    if(fGenDsOption==kCountPhipi && pdgCodeRes!=333) return checkCD;
    else if(fGenDsOption==kCountK0stK && pdgCodeRes!=313) return checkCD;
  }
  Int_t nDauRes=part->GetNDaughters();
  if(nDauRes!=2) return checkCD;
  Int_t labelFirstDauRes = part->GetDaughter(0);  
  for(Int_t iDauRes=0; iDauRes<2; iDauRes++){
    Int_t indDR = labelFirstDauRes+iDauRes;
    AliAODMCParticle* partDR = dynamic_cast<AliAODMCParticle*>(fmcArray->At(indDR));
    if(!partDR){
      AliError("Daughter particle not found in MC array");
      return checkCD;
    }
    Int_t pdgCodeDR=TMath::Abs(partDR->GetPdgCode());
    if(nDauFound>=3) return checkCD;
    daughter[nDauFound]=pdgCodeDR;
    sumPxDau+=partDR->Px();
    sumPyDau+=partDR->Py();
    sumPzDau+=partDR->Pz();
    nDauFound++;
  }
      }
    }
  }else{
    return checkCD;
  }
  for(Int_t iDau1=0; iDau1<3; iDau1++){
    for(Int_t iDau2=iDau1; iDau2<3; iDau2++){
      if(daughter[iDau1]<daughter[iDau2]){
  Int_t tmp=daughter[iDau1];
  daughter[iDau1]=daughter[iDau2];
  daughter[iDau2]=tmp;
      }
    }
  }
  for(Int_t iDau=0; iDau<3; iDau++){
    if(daughter[iDau]!=pdgDaughter[iDau]){
      AliDebug(2, "Wrong decay channel from MC, skipping!!");
      return checkCD;  
    }
  }
  
  Double_t pxMother=fmcPartCandidate->Px();
  Double_t pyMother=fmcPartCandidate->Py();
  Double_t pzMother=fmcPartCandidate->Pz();
  if(TMath::Abs(pxMother-sumPxDau)/(TMath::Abs(pxMother)+1.e-13)>0.00001 ||
     TMath::Abs(pyMother-sumPyDau)/(TMath::Abs(pyMother)+1.e-13)>0.00001 ||
     TMath::Abs(pzMother-sumPzDau)/(TMath::Abs(pzMother)+1.e-13)>0.00001){
    AliDebug(2, "Momentum conservation violated, skipping!!");
    return checkCD;  
  }

  checkCD = kTRUE;
  return checkCD;
  
}
//---------------------------------
Bool_t AliCFVertexingHF3Prong::CheckLc3Prong() const
{
  Int_t numberOfLambdac=0;
  if(TMath::Abs(fmcPartCandidate->GetPdgCode())!=4122) return kFALSE;
  Int_t nDaugh = (Int_t)fmcPartCandidate->GetNDaughters();
  if(nDaugh<2) return kFALSE;
  if(nDaugh>3) return kFALSE;
  AliAODMCParticle* pdaugh1 = (AliAODMCParticle*)fmcArray->At(fmcPartCandidate->GetDaughter(0));
  if(!pdaugh1) {return kFALSE;}
  Int_t number1 = TMath::Abs(pdaugh1->GetPdgCode());
  AliAODMCParticle* pdaugh2 = (AliAODMCParticle*)fmcArray->At(fmcPartCandidate->GetDaughter(1));
  if(!pdaugh2) {return kFALSE;}
  Int_t number2 = TMath::Abs(pdaugh2->GetPdgCode());
  if(nDaugh==3){
    if(fResonantDecay!=AliCFTaskVertexingHF::kNonResonant && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
    Int_t thirdDaugh=fmcPartCandidate->GetDaughter(1)-1;
    AliAODMCParticle* pdaugh3 = (AliAODMCParticle*)fmcArray->At(thirdDaugh);
    if(!pdaugh3) return kFALSE;
    Int_t number3 = TMath::Abs(pdaugh3->GetPdgCode());
    if((number1==321 && number2==211 && number3==2212) || (number1==211 && number2==321 && number3==2212) || (number1==211 && number2==2212 && number3==321) || (number1==321 && number2==2212 && number3==211) || (number1==2212 && number2==321 && number3==211) || (number1==2212 && number2==211 && number3==321)) numberOfLambdac++;
  }
  if(nDaugh==2){
    if(fResonantDecay==AliCFTaskVertexingHF::kNonResonant)return kFALSE; 
    Int_t nfiglieK=0;
    if((number1==2212 && number2==313)){
      if(fResonantDecay!=AliCFTaskVertexingHF::kKstar && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieK=pdaugh2->GetNDaughters();
      if(nfiglieK!=2) return kFALSE;
      AliAODMCParticle* pdaughK1 = (AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(0));
      AliAODMCParticle* pdaughK2 = (AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(1));
      if(!pdaughK1) return kFALSE;
      if(!pdaughK2) return kFALSE;
      if((TMath::Abs(pdaughK1->GetPdgCode())==211 && TMath::Abs(pdaughK2->GetPdgCode())==321) || (TMath::Abs(pdaughK1->GetPdgCode())==321 && TMath::Abs(pdaughK2->GetPdgCode())==211)) numberOfLambdac++;
    }
    if((number1==313 && number2==2212)){
      if(fResonantDecay!=AliCFTaskVertexingHF::kKstar && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieK=pdaugh1->GetNDaughters();
      if(nfiglieK!=2) return kFALSE;
      AliAODMCParticle* pdaughK1 = (AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(0));
      AliAODMCParticle* pdaughK2 = (AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(1));
      if(!pdaughK1) return kFALSE;
      if(!pdaughK2) return kFALSE;
      if((TMath::Abs(pdaughK1->GetPdgCode())==211 && TMath::Abs(pdaughK2->GetPdgCode())==321) || (TMath::Abs(pdaughK1->GetPdgCode())==321 && TMath::Abs(pdaughK2->GetPdgCode())==211)) numberOfLambdac++;
    }
    Int_t nfiglieDelta=0;
    if(number1==321 && number2==2224){
      if(fResonantDecay!=AliCFTaskVertexingHF::kDelta && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieDelta=pdaugh2->GetNDaughters();
      if(nfiglieDelta!=2) return kFALSE;
      AliAODMCParticle *pdaughD1=(AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(0));
      AliAODMCParticle *pdaughD2=(AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(1));
      if(!pdaughD1) return kFALSE;
      if(!pdaughD2) return kFALSE;
      if((TMath::Abs(pdaughD1->GetPdgCode())==211 && TMath::Abs(pdaughD2->GetPdgCode())==2212) || (TMath::Abs(pdaughD1->GetPdgCode())==2212 && TMath::Abs(pdaughD2->GetPdgCode())==211)) numberOfLambdac++;
    }
    if(number1==2224 && number2==321){
      if(fResonantDecay!=AliCFTaskVertexingHF::kDelta && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieDelta=pdaugh1->GetNDaughters();
      if(nfiglieDelta!=2) return kFALSE;
      AliAODMCParticle* pdaughD1 = (AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(0));
      AliAODMCParticle* pdaughD2 = (AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(1)); 
      if(!pdaughD1) return kFALSE;
      if(!pdaughD2) return kFALSE;
      if((TMath::Abs(pdaughD1->GetPdgCode())==211 && TMath::Abs(pdaughD2->GetPdgCode())==2212) || (TMath::Abs(pdaughD1->GetPdgCode())==2212 && TMath::Abs(pdaughD2->GetPdgCode())==211)) numberOfLambdac++;
    }
    
    Int_t nfiglieLa=0;
    if(number1==3124 && number2==211){
      if(fResonantDecay!=AliCFTaskVertexingHF::kL1520 && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieLa=pdaugh1->GetNDaughters();
      if(nfiglieLa!=2) return kFALSE;
      AliAODMCParticle *pdaughL1=(AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(0));
      AliAODMCParticle *pdaughL2=(AliAODMCParticle*)fmcArray->At(pdaugh1->GetDaughter(1));
      if(!pdaughL1) return kFALSE;
      if(!pdaughL2) return kFALSE;
      if((TMath::Abs(pdaughL1->GetPdgCode())==321 && TMath::Abs(pdaughL2->GetPdgCode())==2212) || (TMath::Abs(pdaughL1->GetPdgCode())==2212 && TMath::Abs(pdaughL2->GetPdgCode())==321)) numberOfLambdac++;
    }
    if(number1==211 && number2==3124){
      if(fResonantDecay!=AliCFTaskVertexingHF::kL1520 && fResonantDecay!=AliCFTaskVertexingHF::kAll)return kFALSE; 
      nfiglieLa=pdaugh2->GetNDaughters();
      if(nfiglieLa!=2) return kFALSE;
      AliAODMCParticle *pdaughL1=(AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(0));
      AliAODMCParticle *pdaughL2=(AliAODMCParticle*)fmcArray->At(pdaugh2->GetDaughter(1));
      if(!pdaughL1) return kFALSE;
      if(!pdaughL2) return kFALSE;
      if((TMath::Abs(pdaughL1->GetPdgCode())==321 && TMath::Abs(pdaughL2->GetPdgCode())==2212) || (TMath::Abs(pdaughL1->GetPdgCode())==2212 && TMath::Abs(pdaughL2->GetPdgCode())==321)) numberOfLambdac++;
      
    }
  }
  if(numberOfLambdac>0) return kTRUE;
  return kFALSE;
}