noun ·Rare ·Advanced level
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"The fermions treated by the Standard Model are the (composite) baryons and the (elementary) leptons and quarks."
"The fermions treated by the Standard Model are the (composite) baryons and the (elementary) leptons and quarks."
Any elementary or composite particle that has half-integer spin and thus obeys Fermi–Dirac statistics and the Pauli exclusion principle (equivalently, a particle for which the wavefunction of any system of identical such particles changes sign whenever two are swapped); a baryon, a lepton or a quark;
The fermions treated by the Standard Model are the (composite) baryons and the (elementary) leptons and quarks.
Pronounced /ˈfɜːmɪɒn/.
From Fermi + -on. Named after Italian-American physicist Enrico Fermi. Coined by English physicist Paul Dirac in 1945 in a lecture titled "Developments in Atomic Theory".