Reactions

9.6 Decays and collisions:

1.  Decays   and  conservation laws

   • Charge         Baryon number      

   • Lepton number           Electroness        Muoness         Tauness

   • Strangeness is conserved only in strong interactions

   • More mass before          Mass-energy

   • Momentum       

   • Spin

2.  Collisions         Redistribution of elementary particles           Mass and kinetic energy          Creation & annihilation of particles