BRAINCAKEQuark Composition of Hadrons
Hadrons are particles made of quarks, held together by the strong force. Quarks are never found on their own. The quarks you need, with their antiquarks, are:
up (u): charge +2/3 e, baryon number +1/3
down (d): charge −1/3 e, baryon number +1/3
strange (s): charge −1/3 e, baryon number +1/3
Each antiquark (ū, d̄, s̄) has the opposite charge and a baryon number of −1/3.
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Key terms in this lesson
- baryon number
- A quantum number assigned +1 to baryons, -1 to antibaryons and 0 to other particles, conserved in every interaction.
More in Particle Physics
- Annihilation
- The Standard Model
- Quarks
- Leptons
- Baryons and Mesons
- Conservation Laws in Particle Interactions
- Charge, Baryon Number and Lepton Number
- Particle Interaction Questions
All 19 lessons in Particle Physics · All Edexcel A-level Physics topics