HBTAN/AliHBTParticle.cxx

   1 //Simplified TParticle class
   2
   3
   4 #include "AliHBTParticle.h"
   5
   6 #include <TParticle.h>
   7
   8 ClassImp(AliHBTParticle)
   9
  10 //______________________________________________________________________________
  11 AliHBTParticle::AliHBTParticle():
  12                 fPdgCode(0), fPx(0), fPy(0),fPz(0),fE(0), fVx(0), fVy(0),fVz(0),fVt(0)
  13 {//empty particle
  14 }
  15
  16
  17 //______________________________________________________________________________
  18 AliHBTParticle::AliHBTParticle(Int_t pdg, Double_t px, Double_t py, Double_t pz, Double_t etot,
  19                      Double_t vx, Double_t vy, Double_t vz, Double_t time):
  20   fPdgCode(pdg), fPx(px), fPy(py),fPz(pz),fE(etot),
  21                  fVx(vx), fVy(vy),fVz(vz),fVt(time)
  22 {
  23 //mormal constructor
  24
  25   if (GetPDG()) {
  26      fCalcMass    = GetPDG()->Mass();
  27   } else {
  28      Double_t a2 = fE*fE -fPx*fPx -fPy*fPy -fPz*fPz;
  29      if (a2 >= 0) fCalcMass =  TMath::Sqrt(a2);
  30      else         fCalcMass = -TMath::Sqrt(-a2);
  31   }
  32 }
  33
  34 //______________________________________________________________________________
  35 AliHBTParticle::AliHBTParticle(const TParticle &p):
  36    fPdgCode(p.GetPdgCode()),
  37    fPx(p.Px()),fPy(p.Py()),fPz(p.Pz()),fE(p.Energy()),
  38    fVx(p.Vx()),fVy(p.Vy()),fVz(p.Vz()),fVt(p.T())
  39 {
  40  //all copied in the initialization
  41 }
  42
  43 //______________________________________________________________________________
  44 const Char_t* AliHBTParticle::GetName() const
  45 {
  46    static char def[4] = "XXX";
  47    const TParticlePDG *ap = TDatabasePDG::Instance()->GetParticle(fPdgCode);
  48    if (ap) return ap->GetName();
  49    else    return def;
  50 }
  51
  52
  53 //______________________________________________________________________________
  54
  55