Astrophysics (Index)About

fermion

(particle with half-integer spin)

The particle-physics term fermion refers to a particle with half-integer spin, i.e., 1/2 different than some integer (1/2, 3/2, -1/2, etc.). The particle-physics term boson refers to a particle with full-integer spin (1, 2, 3, etc.). An elementary fermion is one that is an elementary particle, and a composite fermion is one that is a composite particle (comprising elementary particles whose spins sum to a half-integer number), these two categories sharing the characteristics associated with half-integer spin, including adherence to Fermi-Dirac statistics. Example elementary fermions include any of the quarks and leptons. Baryons are one type of composite fermion.


(physics,particle)
Further reading:
https://en.wikipedia.org/wiki/fermion
http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/spinc.html#c2
https://www.thoughtco.com/fermion-definition-in-physics-2699188
https://theory.physics.manchester.ac.uk/~judith/stat_therm/node90.html

Referenced by pages:
Bose-Einstein statistics
boson
electron (e-)
elementary particle
Fermi sea
Fermi-Dirac statistics
hyperon
lepton
Majorana particle
neutrino (ν)
particle
Pauli exclusion principle
quark
spin (ms)

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