PWG2/RESONANCES/AliRsnMother.h

   1 #ifndef ALIRSNMOTHER_H
   2 #define ALIRSNMOTHER_H
   3
   4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   5  * See cxx source for full Copyright notice                               */
   6
   7 ////////////////////////////////////////////////////////////////////////////////
   8 //
   9 //  Interface to candidate resonance decaying into 2 bodies.
  10 //
  11 ////////////////////////////////////////////////////////////////////////////////
  12
  13 #include "AliRsnDaughter.h"
  14
  15 class AliRsnMother : public TObject {
  16 public:
  17
  18    AliRsnMother();
  19    AliRsnMother(const AliRsnMother &obj);
  20    AliRsnMother& operator=(const AliRsnMother &obj);
  21    virtual ~AliRsnMother();
  22
  23    AliRsnDaughter*   GetDaughter(const Int_t &index)    const {if (index < 1) return   fDaughter[0] ; return   fDaughter[1] ;}
  24    AliRsnDaughter&   GetDaughterRef(const Int_t &index) const {if (index < 1) return (*fDaughter[0]); return (*fDaughter[1]);}
  25    TLorentzVector&   Sum()                                    {return fSum;}
  26    TLorentzVector&   SumMC()                                  {return fSumMC;}
  27
  28    Double_t          AngleTo(AliRsnDaughter *track, Bool_t mc = kFALSE) const {if (track) return fSum.Angle(track->P(mc).Vect()); return -99.0;}
  29    Double_t          CosThetaStar(Bool_t first = kTRUE, Bool_t useMC = kFALSE);
  30
  31    Bool_t            IsLabelEqual() const {return abs(fDaughter[0]->GetLabel()) == abs(fDaughter[1]->GetLabel());}
  32    Bool_t            IsIndexEqual() const {return (fDaughter[0]->GetID() == fDaughter[1]->GetID());}
  33    Int_t             CommonMother(Int_t &m0, Int_t &m1) const;
  34    Int_t             CommonMother() const {Int_t d0, d1; return CommonMother(d0, d1);}
  35
  36    void              SetDaughters(AliRsnDaughter * const daughter1, Double_t mass1, AliRsnDaughter * const daughter2, Double_t mass2);
  37    void              ResetPair();
  38    void              PrintInfo(const Option_t *option = "ALL") const;
  39    Bool_t            CheckPair(Bool_t checkMC = kFALSE) const;
  40
  41 private:
  42
  43    AliRsnDaughter  *fDaughter[2];      // elements of the pair
  44    TLorentzVector   fSum;              // sum computed from the two daughters
  45    TLorentzVector   fSumMC;            // sum computed from the two daughters
  46
  47    ClassDef(AliRsnMother, 1)
  48 };
  49
  50 #endif