Tuesday, March 09, 2004


In physics, any of the subatomic particles that are built from quarks and thus react through the agency of the strong nuclear force. The hadrons embrace mesons (e.g., pions and kaons), baryons (e.g., protons, neutrons, and sigma particles), and their many resonances. All observed subatomic particles except bosons (e.g., photons, W particles, and Z particles) and leptons (e.g., electrons,


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