phys_tree/Particle.h

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//
//    File: Particle.h
// Created: Thu Oct 29 09:49:51 EDT 2009
// Creator: davidl (on Darwin Amelia.local 9.8.0 i386)
//

#ifndef _Particle_
#define _Particle_

#include <TObject.h>
#include <TVector3.h>
#include <TLorentzVector.h>

class Particle:public TObject{

   public:

      Particle(){};
      ~Particle(){};

      // Data members
      TLorentzVector p; // paritcle 4-momentum
      TVector3 x;       // vertex position
      Bool_t is_fiducial;  // True if particle is in fiducial region based on particle type
      Double_t chisq;
      Int_t Ndof;
      Double_t FOM_pid;

      // This is used to sort a TClonesArray of this type of object
      Bool_t IsSortable(void) const { return kTRUE;}
      Int_t Compare(const TObject *a) const{
         Double32_t diff = ((Particle*)this)->p.E() - ((Particle*)a)->p.E();
         Int_t idiff = diff>0.0 ? +1:(diff<0.0 ? -1:0);
         return idiff;
      }

      // Copy constructor
      Particle& operator=(const Particle &prt){
         this->p = prt.p;
         this->x = prt.x;
         this->is_fiducial = prt.is_fiducial;
         this->chisq = prt.chisq;
         this->Ndof = prt.Ndof;
         this->FOM_pid = prt.FOM_pid;
         return *this;
      }

   private:
      ClassDef(Particle,1);

};

#endif // _Particle_