rho_t.h

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// $Id$
//
//    File: rho_t.h
// Created: Tue Oct 13 10:33:35 EDT 2009
// Creator: davidl (on Darwin harriet.jlab.org 9.8.0 i386)
//

#ifndef _rho_t_
#define _rho_t_

#include <math.h>

#include <iostream>

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

class rho_t:public TObject{
   public:
      
      rho_t(void):m(0.0){}
      
      Double32_t m;        // invariant mass of pip and pim
      TLorentzVector pip;  // pi+ parameters
      TLorentzVector pim;  // pi- parameters
      Bool_t isfiducial;   // True if both reconstructed pi+ and pi- are in fiducial phasespace
      
      // This is used to sort the TClonesArray rho in Event
      Bool_t IsSortable(void) const { return kTRUE;}
      Int_t Compare(const TObject *a) const{
         Double32_t diff = fabs(((rho_t*)this)->m-0.77) - fabs(((rho_t*)a)->m-0.77);
         Int_t idiff = diff>0.0 ? +1:(diff<0.0 ? -1:0);
         return idiff;
      }
      
      rho_t& operator=(const rho_t &ti){
         this->m = ti.m;
         this->pip = ti.pip;
         this->pim = ti.pim;
         this->isfiducial = ti.isfiducial;
         return *this;
      }
      
   private:
      ClassDef(rho_t,1);
};



#endif // _rho_t_