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Baryons and Mesons

AQA AS-level PhysicsQuarks and LeptonsLesson 10 of 17

Baryons are hadrons created through the strong interaction

They consist of protons and other hadrons that decay into protons (e.g. neutrons)

They are made of three quarks (qqq).

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Key terms in this lesson

Strong nuclear force
The short-range attractive force between nucleons that overcomes the electrostatic repulsion between protons and holds the nucleus together, becoming repulsive at very short separations.
Hadron
A particle made up of quarks that interacts through the strong interaction; hadrons are divided into baryons and mesons.
Quark
A fundamental particle that combines with other quarks to make up hadrons; at A-level, up, down and strange quarks are considered.
Pion
A meson, made of a quark-antiquark pair, that may be positively charged, negatively charged or neutral; produced through the strong interaction and decaying through the weak interaction.

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All 17 lessons in Quarks and Leptons · All AQA AS-level Physics topics