BRAINCAKELeptons
Leptons are fundamental particles that do not feel the strong force. There are six:
• the electron (e-), the muon (μ-) and the tau (τ-), each with charge –1e
• the electron neutrino (νe), muon neutrino (νμ) and tau neutrino (ντ), each with zero charge
The electron is stable. The muon (106 MeV/c2, about 207 times the mass of the electron) and the tau (1777 MeV/c2) are heavier versions of the electron; they are unstable and decay into lighter particles.
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More in Particle Physics
- Pair Production
- Annihilation
- The Standard Model
- Quarks
- Baryons and Mesons
- Quark Composition of Hadrons
- Conservation Laws in Particle Interactions
- Charge, Baryon Number and Lepton Number
All 19 lessons in Particle Physics · All Edexcel A-level Physics topics