Particle Dark Matter

Prelude: Particle Physics Take II

• Conservation laws
• Fundamental particles
  • hadrons = composites of quarks
    (cf. drinking song from Finnegan's Wake )
    Particle Data Group : baryons and mesons
    mesons in space!
  • leptons: PDG listings
• Fundamental interactions
  force-carrying bosons: PDG listings
• Relativistic kinematics

Hot Relics: Neutrinos

• relic density requirements
• mass limits and the need for physics beyond the Standard Model