Matter and antimatter

Matter and antimatter

1. Hadrons

   • Baryons
     • Contains 3 quarks
     • Interaction = strong nuclear and electromagnetic
     • Involved in weak decay
     • Protons
       • Charge = +1.6e-19
       • Mass = 1.67e-27
       • Made up of uud quarks
       • Rest mass = 938.25 MeV
     • Antiprotons
       • Made of antiquarks to normal proton
       • Charge = -1.6e-19
       • Mass = 1.67e-27
       • Rest mass = 938.25 MeV
     • Neutrons
       • No charge
       • Mass = 1.67e-27
       • Rest mass = 939.55 MeV
       • Made up of udd qaurks
     • Antineutrons
       • Made up of antiqaurks to the normal neutron
       • Mass = 1.67e-27
       • No charge
       • Rest mass = 939.55 MeV
   • Mesons
     • Interactions = weak nuclear and electromagnetic
     • Always contains a quark antiquark pair
     • Weak decay
     • Kaon
       • Can have a charge of +, - or neutral
       • Rest mass = 497.7 MeV
       • Quarks
         • K+
           • up and antistrange
         • K
           • down and antistrange
         • K-
           • anti-up and strange
     • Pion
       • Can have a charge of +, - or neutral
       • Rest mass = 135 MeV
       • Quarks
         • Pi+
           • up and anti-down
         • Pi
           • up and anti-up
         • Pi-
           • anti-up and down