Hadrons

• Particles become fundamental when the can no longer be broken down into smaller components.
• Rutherford's experiments demonstrated that the proton was not solid, but was composed of smaller particles . These particles were called quarks.
• Hadrons is the general name given to particles made up of quarks. They are broken into two subgroups , baryons and mesons.
• Anti-baryons are made up of three antiquarks
• Baryons are particles are made up of three quark is baryons
• Conserved qualities:

  • mass
  • energy
  • charge
  • baryon number
  • lepton number
  • strangeness (not including weak interaction)
• Mesons are particles made of a quark /anti-quark pair . there are no stable examples of mesons. Mesons are not , baryons. they include pions and kaons.
• Pions contain no strange quarks whereas kaons contain strange quarks.