PWG3/vertexingHF/AliAODRecoDecayHF4Prong.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-2006, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  10  * copies and that both the copyright notice and this permission notice   *
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  15
  16 /////////////////////////////////////////////////////////////
  17 //
  18 // Base class for AOD reconstructed heavy-flavour 4-prong decay
  19 //
  20 // Authors: G.E.Bruno Giuseppe.Bruno@to.infn.it, R.Romita Rossella.Romita@ba.infn.it
  21 /////////////////////////////////////////////////////////////
  22
  23 #include <TDatabasePDG.h>
  24 #include "AliAODRecoDecayHF.h"
  25 #include "AliAODRecoDecayHF4Prong.h"
  26 #include "TRandom.h" // for the time being
  27
  28 ClassImp(AliAODRecoDecayHF4Prong)
  29
  30 //--------------------------------------------------------------------------
  31 AliAODRecoDecayHF4Prong::AliAODRecoDecayHF4Prong() :
  32   AliAODRecoDecayHF(),
  33   //fSigmaVert(0),
  34   fDist12toPrim(0),
  35   fDist23toPrim(0),
  36   fDist14toPrim(0),
  37   fDist34toPrim(0)
  38 {
  39   //
  40   // Default Constructor
  41   //
  42 }
  43 //--------------------------------------------------------------------------
  44 AliAODRecoDecayHF4Prong::AliAODRecoDecayHF4Prong(AliAODVertex *vtx2,
  45                                                  Double_t *px,Double_t *py,Double_t *pz,
  46                                                  Double_t *d0,Double_t *d0err,
  47                                                  Double_t *dca, //Double_t sigvert,
  48                                                  Double_t dist12,Double_t dist23,
  49                                                  Double_t dist14,Double_t dist34,
  50                                                  Short_t charge) :
  51   AliAODRecoDecayHF(vtx2,4,charge,px,py,pz,d0,d0err),
  52   // fSigmaVert(sigvert),
  53   fDist12toPrim(dist12),
  54   fDist23toPrim(dist23),
  55   fDist14toPrim(dist14),
  56   fDist34toPrim(dist34)
  57 {
  58   //
  59   // Constructor with AliAODVertex for decay vertex
  60   //
  61   SetDCAs(6,dca);
  62 }
  63 //--------------------------------------------------------------------------
  64 AliAODRecoDecayHF4Prong::AliAODRecoDecayHF4Prong(AliAODVertex *vtx2,
  65                                                  Double_t *d0,Double_t *d0err,
  66                                                  Double_t *dca, //Double_t sigvert,
  67                                                  Double_t dist12,Double_t dist23,
  68                                                  Double_t dist14,Double_t dist34,
  69                                                  Short_t charge) :
  70   AliAODRecoDecayHF(vtx2,4,charge,d0,d0err),
  71   //fSigmaVert(sigvert),
  72   fDist12toPrim(dist12),
  73   fDist23toPrim(dist23),
  74   fDist14toPrim(dist14),
  75   fDist34toPrim(dist34)
  76 {
  77   //
  78   // Constructor with AliAODVertex for decay vertex and without prongs momenta
  79   //
  80   SetDCAs(6,dca);
  81 }
  82 //--------------------------------------------------------------------------
  83 AliAODRecoDecayHF4Prong::AliAODRecoDecayHF4Prong(const AliAODRecoDecayHF4Prong &source) :
  84   AliAODRecoDecayHF(source),
  85   //fSigmaVert(source.fSigmaVert),
  86   fDist12toPrim(source.fDist12toPrim),
  87   fDist23toPrim(source.fDist23toPrim),
  88   fDist14toPrim(source.fDist14toPrim),
  89   fDist34toPrim(source.fDist34toPrim)
  90 {
  91   //
  92   // Copy constructor
  93   //
  94 }
  95 //--------------------------------------------------------------------------
  96 AliAODRecoDecayHF4Prong &AliAODRecoDecayHF4Prong::operator=(const AliAODRecoDecayHF4Prong &source)
  97 {
  98   //
  99   // assignment operator
 100   //
 101   if(&source == this) return *this;
 102
 103   AliAODRecoDecayHF::operator=(source);
 104
 105   fDist12toPrim= source.fDist12toPrim;
 106   fDist23toPrim= source.fDist23toPrim;
 107   fDist14toPrim= source.fDist14toPrim;
 108   fDist34toPrim= source.fDist34toPrim;
 109   //fSigmaVert= source.fSigmaVert;
 110
 111   return *this;
 112 }
 113 //--------------------------------------------------------------------------
 114 Bool_t AliAODRecoDecayHF4Prong::SelectD0(const Double_t *cuts,Int_t &okD0,Int_t &okD0bar)
 115   const {
 116 //
 117 // This function compares the D0 with a set of cuts:
 118 //
 119 // to be implemented
 120 //
 121 // cuts[1] = ...
 122 // cuts[2] = ...
 123 // cuts[3] = ...
 124 // cuts[4] = ...
 125 //
 126 // If candidate D0 does not pass the cuts return kFALSE
 127 //
 128
 129   okD0=0; okD0bar=0;
 130   Double_t mD0PDG = TDatabasePDG::Instance()->GetParticle(421)->Mass();
 131   Double_t mD0=InvMassD0();
 132   if(TMath::Abs(mD0-mD0PDG)>cuts[0]) return kFALSE;
 133
 134   //single track
 135   //if(TMath::Abs(PtProng(2)) < cuts[2] || TMath::Abs(Getd0Prong(2))<cuts[4])return kFALSE;//Pion2
 136
 137   //DCA
 138   //for(Int_t i=0;i<3;i++) if(cuts[11]>0 && GetDCA(i)>cuts[11])return kFALSE;
 139
 140   //2track cuts
 141   //if(fDist12toPrim<cuts[5] || fDist23toPrim<cuts[5])return kFALSE;
 142   //if(Getd0Prong(0)*Getd0Prong(1)<0 && Getd0Prong(2)*Getd0Prong(1)<0)return kFALSE;
 143
 144   //sec vert
 145   //if(fSigmaVert>cuts[6])return kFALSE;
 146
 147   //if(DecayLength()<cuts[7])return kFALSE;
 148
 149   return kFALSE; // for the time being
 150   // return kTRUE; // after implementation
 151 }