In pairticle pheesics, a fermion (a name coined bi Paul Dirac[1] frae the surname o Enrico Fermi) is ony subatomic pairticle chairacterised bi Fermi–Dirac stateestics. Thir pairticles obey the Pauli exclusion principle. Fermions include aw quarks an leptons, as well as ony composite pairticle made o an odd nummer o thir, such as aw baryons an mony atoms an nuclei. Fermions differ frae bosons, which obey Bose–Einstein stateestics.

Enrico Fermi


  1. Notes on Dirac's lecture Developments in Atomic Theory at Le Palais de la Découverte, 6 December 1945, UKNATARCHI Dirac Papers BW83/2/257889. See note 64 on page 331 in "The Strangest Man: The Hidden Life of Paul Dirac, Mystic of the Atom" by Graham Farmelo