More Decay Channels

Polarization

high energy* hadronic particles (pion,kaon, ,proton,...)

off nuclei.

G4VDecayChannel is an abstract class

G4DecayTable class is a list of possible decay modes and their branching ratios

G4VDecayChannel class

is used to describe decay modes.

• G4VDecayChannel has
  • Branching Ratio
  • Daughter Particle List
  • Decay Kinematics given by
    G4VDecayChannel::DecayIt method

If daughter particles are written in HEPEVT format,

the parent keeps these information in

G4DynamicParticle::thePreeAssignedDecayProducts

G4Decay creates tracks for daughter particles

• by using thePreeAssignedDecayProducts
• with taking account of momentum change of the parent particle during tracking in the detector

Class Diagram

Decay mode is given by using

• Event Generator Information
  • ex.) Heavy Quark Decays in PYTHIA
• or
• Decay Table Information
  • ex.) ?0 decay

Daughter particles are

• created according to the given decay mode
• and
• stored in G4DecayPorducts class

G4Decay Class manages

• Decay at Rest
  • AtRestDoIt
  • mean life time = ?
• Decay in Flight@
  • PostStepDoIt
  • mean free path = c????

swept surfaces

testing of Newton iteration as part of curve/surface intersection algorithms

further optimization of solid tracking algorithm