HDilepton

class HDilepton : public TLorentzVector

    public:

                      HDilepton(Double_t px = 0., Double_t py = 0., Double_t pz = 0., Double_t m = 0.)
                      HDilepton(HParticle* p1, HParticle* p2)
                      HDilepton(const HDilepton&)
                      HDilepton(const HDilepton*)
              virtual ~HDilepton()
       static TClass* Class()
                Int_t getCharge() const
              Float_t getOpeningAngle() const
           HParticle* getPart1() const
                Int_t getPart1Id() const
           HParticle* getPart2() const
                Int_t getPart2Id() const
      virtual TClass* IsA() const
           HDilepton& operator=(const HDilepton&)
                 void setCharge(Int_t sCharge = 0)
                 void setInvMass(Float_t sInvMass = 0)
                 void setPart1(HParticle* p)
                 void setPart1Id(Int_t sPart1Id = 0)
                 void setPart2(HParticle* p)
                 void setPart2Id(Int_t sPart2Id = 0)
                 void setVect4(const TLorentzVector& v)
         virtual void ShowMembers(TMemberInspector& insp, char* parent)
         virtual void Streamer(TBuffer& b)
                 void StreamerNVirtual(TBuffer& b)
       TLorentzVector Vect4() const

Data Members

    protected:

      HParticle* part1         ! Particle 1
      HParticle* part2         ! Particle 2
           Int_t part1Id       Index of 1st HParticle
           Int_t part2Id       Index of 2nd HParticle
         Float_t invMass       added as data member to allow easier access through Draw() commands
         Float_t openingAngle  DEGREES.  Filled when an HParticle is set  ( SetPart1(part1)...)
           Int_t charge        "Charge" of dilepton; -2 = e-e-, 0=e+e-, +2=e+e+

Class Description

  HDilepton - Data container for lepton pairs and their 4-momenta.

  This class derives from TLorentzVector, so that all of the functions
  available to TLorentzVector can be performed on HDilepton objects.

  HDileptons can be e+e- (by default) or like-sign pairs (e+e+ or e-e-).  The type
  of pair is assigned with the charge data member; a charge of +2 (-2) identifies a
  pair of positrons (electrons).

  HDilepton's can be initialized as follows:
      dilept = new HDilepton();
      dilept = new HDilepton(HParticle *p1, HParticle *p2);
      dilept = new HDilepton(Double_t px, Double_t py, Double_t pz, Double_t m);
         (this constructor assigns openingAngle = 0)

  An HDilepton's 4-momenta, openingAngle, and invMass are calculated automatically
  whenever an HParticle is set or by using the HDilepton constructor with two
  HParticles.

  Example code:

      HParticle part1(10.,10.,10,0.511);
      HParticle part2(10.,15.,20,0.511);

      HDilepton dilept(&part1,&part2);
      mInv = dilept.M();
         (and much more....)

 

 Px, Py, Pz (MeV/c), mass (MeV/c**2)

 Two HParticles; dilepton's quantities are calculated by constructor

 copy constructor

 copy constructor

 Each time an HParticle is set, the dilepton's 4-vector and opening angle
 are recalculated

 Each time an HParticle is set, the dilepton's 4-vector and opening angle
 are recalculated

Inline Functions

                  void ~HDilepton()
                  void setInvMass(Float_t sInvMass = 0)
                 Int_t getCharge() const
                  void setCharge(Int_t sCharge = 0)
                 Int_t getPart1Id() const
                  void setPart1Id(Int_t sPart1Id = 0)
                 Int_t getPart2Id() const
                  void setPart2Id(Int_t sPart2Id = 0)
               Float_t getOpeningAngle() const
            HParticle* getPart1() const
            HParticle* getPart2() const
        TLorentzVector Vect4() const
                  void setVect4(const TLorentzVector& v)
            HDilepton& operator=(const HDilepton&)
               TClass* Class()
               TClass* IsA() const
                  void ShowMembers(TMemberInspector& insp, char* parent)
                  void Streamer(TBuffer& b)
                  void StreamerNVirtual(TBuffer& b)