Unit 1 Particle Classification

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  • Particles
    • Hadrons
      • Mesons
        • Made up of one quark, and one antiquark
        • Pions
          • Always contain up and down quarks
          • ?0
            • UU*
          • ?-
            • U*D
          • ?0
            • DD*
          • ?+
            • UD*
        • Kaons
          • Always contain at least one strange quark or antiquark
          • K-
            • U*S
          • K0
            • DS*
          • K+
            • US*
          • K0
            • D*S
      • Baryons
        • Proton
          • UUD
          • Baryon Number: 1
        • Neutron
          • UDD
          • Baryon Number: 1
        • Made up of 3 quarks, or 3 antiquarks
        • Anti-proton
          • U*U*D*
          • Baryon Number: -1
        • Anti-neutron
          • U*D*D*
          • Baryon Number: -1
    • Leptons
      • Muon
        • Lepton Number: 1
      • Tau
        • Lepton Number: 1
      • Anti Tau
        • Lepton Number: -1
      • Positron
        • Lepton Number: -1
      • Anti Muon
        • Lepton Number: -1
      • Electron
        • Lepton Number: 1
      • Antineutrinos
        • Lepton Number: -1
      • Neutrinos
        • Lepton Number: 1
      • All leptons have a lepton number of one. Anti leptons have -1, and opposite charges.
    • Bosons
      • Graviton
        • Mediates via Gravity
      • Gluon
        • Mediates via the Strong Force
      • W+,W-,Z
        • Mediates via the Weak Force
      • Photon
        • Mediates via the EM Force
      • These are also known as force carriers. They exchange information between two surfaces.

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