A hadron is a composite particle made up of quarks held together by the strong force, which is one of the four fundamental forces in nature. Hadrons are categorized into two main groups: baryons, which consist of three quarks, and mesons, which consist of a quark and an antiquark. This classification plays a significant role in understanding the structure and behavior of matter at the subatomic level, especially during high-energy interactions like deep inelastic scattering.
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