Physics:Quantum lepton
A quantum lepton is an elementary fermion that does not participate in the strong interaction. Leptons occur in three generations: electron, muon, tau, and their associated neutrinos. Charged leptons interact electromagnetically and weakly, while neutrinos interact primarily through the weak interaction and gravity.[1][2]
Families
The charged leptons are the electron, muon, and tau. Each has an antiparticle and an associated neutrino flavor: electron neutrino, muon neutrino, and tau neutrino. The electron is stable in ordinary matter, while the muon and tau decay through weak interactions.[3]
Interactions
Because leptons have no color charge, they do not couple directly to gluons. Charged leptons couple to photons and to W and Z bosons. Neutrinos are neutral and are detected through weak-interaction processes, making their measurements experimentally challenging.
Quantum role
Leptons are central to atomic structure, beta decay, neutrino oscillations, precision electroweak tests, and collider event reconstruction. Their comparatively clean interactions make them useful probes of both Standard Model parameters and possible new physics.
See also
Table of contents (84 articles)
Index
Full contents
References
- ↑ Particle Data Group (2022). "Review of Particle Physics". Progress of Theoretical and Experimental Physics 2022 (8): 083C01. doi:10.1093/ptep/ptac097.
- ↑ Griffiths, David J. (2008). Introduction to Elementary Particles (2nd ed.). Wiley-VCH. ISBN 978-3-527-40601-2.
- ↑ Halzen, Francis; Martin, Alan D. (1984). Quarks and Leptons: An Introductory Course in Modern Particle Physics. Wiley. ISBN 978-0-471-88741-6.
Source attribution: Lepton