Fermions and Bosons Quiz

Fermions and Bosons

• Particles with half-integer quantum numbers are fermions, examples include electrons.
• Particles with integer quantum numbers are bosons.
• Fermions obey the Pauli Exclusion Principle.
• Bosons do not obey the Pauli Exclusion Principle.

Hadrons and Leptons

• Particles held together by the strong force are hadrons.
• Particles affected by the weak force are leptons.
• Hadrons include protons, neutrons, and pions.
• Leptons include electrons and neutrinos.

Classification of Hadrons

• Some hadrons are bosons, known as mesons, examples include pions.
• Other hadrons are fermions, known as baryons, examples include protons.

Antiparticles

• Every particle has a corresponding antiparticle with the same mass and spin but opposite electric charge.

Particle Interactions

• Proton-antiproton reaction is a strong interaction, resulting in 4π⁺ + 4π⁻, and charge is conserved.
• Pion decay is a weak interaction, resulting in μ⁺ + ν, and charge is conserved.
• Muon decay is a weak interaction, resulting in e⁺ + v + v̅, and charge is conserved.

Conservation Laws

• Lepton number is always conserved in all particle interactions.
• Strangeness is conserved in interactions involving the strong force.

Messenger Particles

• Weak forces are mediated by W and Z messenger particles.
• Strong forces are mediated by gluons.
• Electromagnetic force is mediated by photons.
• Gravitational force is mediated by gravitons.