AliMUONPairLight.h

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#ifndef ALIMUONPAIRLIGHT_H
#define ALIMUONPAIRLIGHT_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */
// Revision of includes 06/09/2006


// MUON classes
#include "AliMUONTrackLight.h"

// ROOT classes
//#include "TLorentzVector.h"
class TLorentzVector;

class AliMUONPairLight : public TObject { 
public:
  AliMUONPairLight();
  AliMUONPairLight(AliMUONPairLight &dimuCopy);
  virtual ~AliMUONPairLight();
  AliMUONPairLight& operator=(const AliMUONPairLight&);
  virtual void SetMuons(const AliMUONTrackLight& mu0, const AliMUONTrackLight& mu1);
  AliMUONTrackLight* GetMuon(Int_t index) ;   
  Int_t GetMuonMotherPDG(Int_t imuon, Int_t mother=0) ; 

  Bool_t IsOpenCharm() {return (TMath::Abs(fMu0.GetParentFlavour(0))==4 && TMath::Abs(fMu1.GetParentFlavour(0))==4 && fIsCorrelated && !IsAResonance());}
  Bool_t IsOpenBeauty() {return (TMath::Abs(fMu0.GetParentFlavour(0))==5 && TMath::Abs(fMu1.GetParentFlavour(0))==5 && fIsCorrelated  && !IsAResonance());}
  Bool_t IsAResonance(); 
  Bool_t IsOneMuonFromPionOrKaon(){return (fMu0.IsParentPionOrKaon(0) || fMu1.IsParentPionOrKaon(0));}
  Bool_t IsCorrelated() const {return fIsCorrelated;}   
  Int_t GetCauseOfCorrelation() const {return fCauseOfCorrelation;}
  Bool_t IsFeedDown() const {return fIsFeedDown;}   
  Bool_t IsOneTrackNotAMuon() {return (!( fMu0.IsAMuon() && fMu1.IsAMuon() )) ;}
  Int_t GetCharge() {return fMu0.GetCharge() + fMu1.GetCharge();}
  Int_t GetCreationProcess() const  {return fCreationProcess;}
  void SetCorrelated(Bool_t answer) {fIsCorrelated = answer; }
  void SetCauseOfCorrelation(Int_t pdg) {fCauseOfCorrelation = pdg; }
  void SetFeedDown(Int_t answer) {fIsFeedDown = answer;}
  TLorentzVector GetPRec(){return fMu0.GetPRec()+fMu1.GetPRec();}
  TLorentzVector GetPGen(){return fMu0.GetPGen()+fMu1.GetPGen();}
  Double_t GetOpeningAngle(); 
  Bool_t IsDimuonFromCorrPiK();
  virtual void PrintInfo(const Option_t* opt);//"H" single muons' decay histories
                                           //"K" dimuon kinematics
                                           //"F" dimuon flags
                                           //"A" all variables

protected: 
  void SetProcess();

  AliMUONTrackLight fMu0;   
  AliMUONTrackLight fMu1;   
  Int_t fCreationProcess; 
  Bool_t fIsCorrelated; 
  Int_t fCauseOfCorrelation; 
  Int_t fIsFeedDown;     

  ClassDef(AliMUONPairLight,1)  
}; 
#endif