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  1. #ifndef BPARTICLE_H
  2. #define BPARTICLE_H
  3. //+
  4. // File : BParticle.h
  5. // Description : class to contain particle info.
  6. //
  7. // Author : Ryosuke Itoh, IPNS, KEK
  8. // Date : 28 - Jan - 2004
  9. //-
  10.  
  11. #include "TObject.h"
  12. #include "TClonesArray.h"
  13.  
  14. enum SIMPLEPID {PHOTON, ELECTRON, PION, MUON, KAON, PROTON, JPSI, D, DSTAR, B,KS, ALL };
  15.  
  16. class BParticle : public TObject {
  17.  
  18.  private:
  19.   float m_px;
  20.   float m_py;
  21.   float m_pz;
  22.   float m_e;
  23.   float m_charge;
  24.   SIMPLEPID m_pid;
  25.  
  26.  public:
  27.   BParticle(){};
  28.   BParticle ( float px, float py, float pz, float e, float c, SIMPLEPID pid );
  29.   ~BParticle(){};
  30.  
  31.   float px() const { return m_px; };
  32.   float py() const { return m_py; };
  33.   float pz() const { return m_pz; };
  34.   float e() const { return m_e; };
  35.   float GetMomentum() const { return sqrt(m_px*m_px+m_py*m_py+m_pz*m_pz); };
  36.   float charge() const { return m_charge; };
  37.   SIMPLEPID pid() const { return m_pid; };
  38.   float GetMass(SIMPLEPID pid);
  39.   float GetMass();
  40.   void SetEnergyFromMass (float mass);
  41.   void SetEnergyFromPid ();
  42.   void SetPid(SIMPLEPID pid){ m_pid = pid; };
  43.   int  InMassRange(float mlower,float mupper){ float m = GetMass(); if (m>=mlower && m<=mupper) return 1; else return 0; };
  44.   BParticle operator+(const BParticle& b){
  45.  
  46.         BParticle particle(
  47.          px() + b.px(),
  48.              py() + b.py(),
  49.          pz() + b.pz(),
  50.          e()  + b.e(),
  51.              charge() + b.charge(),
  52.                  PHOTON // wrong
  53.     );
  54.  
  55.     return particle;
  56. };  
  57.  
  58.  BParticle & operator=(const BParticle  &p)
  59.  {
  60.     //if ( this != &p){
  61.          m_px = p.px();
  62.          m_py = p.py();
  63.          m_pz = p.pz();
  64.          m_e  = p.e();
  65.          m_charge  = p.charge();
  66.          m_pid  =  p.pid();
  67.         //}    
  68.     return *this;
  69.  };
  70.  
  71.  
  72.   ClassDef ( BParticle, 1 ) // Simple particle class
  73. };
  74.  
  75. int SelectParticles(TClonesArray *pin , int charge, SIMPLEPID type, TClonesArray *pout);
  76. int CombineParticles(TClonesArray *plist1 ,TClonesArray *plist2 , float masslow, float massup, SIMPLEPID pid, TClonesArray *pout);
  77.  
  78.  
  79. #endif
  80.