ParticleHypothesis.h

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/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
// ParticleHypothesis.h, (c) ATLAS Detector software
 
#ifndef TRKEXUTILS_PARTICLEHYPOTHESIS_H
#define TRKEXUTILS_PARTICLEHYPOTHESIS_H
 
// Gaudi
#include "GaudiKernel/SystemOfUnits.h"
// define the particle hypotheses
#define PARTICLEHYPOTHESES 11
 
namespace Trk {
 
   enum ParticleHypothesis { nonInteracting  = 0,
                             geantino        = 0,
                             electron        = 1,
                             muon            = 2,                            
                             pion            = 3,                             
                             kaon            = 4,
                             proton          = 5,
                             photon          = 6,  // for Fatras usage
                             neutron         = 7,  // for Fatras usage 
                             pi0             = 8, // for Fatras usage 
                             k0              = 9, // for Fatras usage 
                             nonInteractingMuon = 10, // For material collection
                             noHypothesis    = 99,
                             undefined       = 99};
  
   namespace ParticleMasses {
     constexpr double mass[PARTICLEHYPOTHESES] =
     { (0.*Gaudi::Units::MeV),// non interacting mass
       (0.51099891*Gaudi::Units::MeV), // electron mass
       (105.658367*Gaudi::Units::MeV), // muon mass
       (139.57018*Gaudi::Units::MeV), // charged pion mass
       (493.677*Gaudi::Units::MeV),    // kaon mass
       (938.272013*Gaudi::Units::MeV), // proton mass
       (0.*Gaudi::Units::MeV),         // photon rest mass
       (939.565346*Gaudi::Units::MeV), // neutron rest mass
       (134.9766*Gaudi::Units::MeV),  // pi0 rest mass
       (497.614*Gaudi::Units::MeV),    // K0 rest mass
       (105.658367*Gaudi::Units::MeV) // muon mass
     }; 
   };
   
   namespace ParticleSwitcher {
   constexpr ParticleHypothesis particle[PARTICLEHYPOTHESES] =
   { (Trk::nonInteracting), 
     (Trk::electron),
     (Trk::muon),          
     (Trk::pion),             
     (Trk::kaon),          
     (Trk::proton),         
     (Trk::photon),         
     (Trk::neutron),         
     (Trk::pi0),         
     (Trk::k0),
     (Trk::nonInteractingMuon)
   };
   };
    
   
}
 
#endif