Fermion
E88965
A fermion is a fundamental particle or composite particle that follows Fermi–Dirac statistics and the Pauli exclusion principle, forming the basic building blocks of matter such as electrons, protons, and neutrons.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Fermion canonical | 2 |
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Physical concept
ⓘ
Type of particle ⓘ |
| appearsIn |
Standard Model
ⓘ
surface form:
Standard Model of particle physics
|
| cannot | Occupy the same quantum state as another identical fermion ⓘ |
| contrastsWith | Boson ⓘ |
| fieldType | Spinor field ⓘ |
| follows | Fermi–Dirac statistics ⓘ |
| hasAntiparticle | Antifermion ⓘ |
| hasChargeOptions | Can be electrically charged or neutral ⓘ |
| hasCollectiveExcitationAnalogue | Quasiparticle fermion in condensed matter physics ⓘ |
| hasExchangeSymmetry | Wavefunction changes sign under exchange of two identical fermions ⓘ |
| hasGenerations |
Three generations of leptons
ⓘ
Three generations of quarks ⓘ |
| hasMass | Nonzero rest mass for all known fermions except possibly neutrinos ⓘ |
| hasProperty |
Antisymmetric many-particle wavefunction
ⓘ
Subject to Pauli exclusion in identical states ⓘ |
| hasQuantumNumber | Half-integer total angular momentum ⓘ |
| hasSpin |
1/2 ħ
ⓘ
3/2 ħ ⓘ 5/2 ħ ⓘ Half-integer spin ⓘ |
| includes |
Baryon
ⓘ
Electron ⓘ Lepton ⓘ Muon ⓘ Neutrino ⓘ Neutron ⓘ Nucleon ⓘ Proton ⓘ Quark ⓘ Tau lepton ⓘ |
| isBuildingBlockOf | Matter ⓘ |
| isClassifiedAs |
Composite fermion
ⓘ
Elementary fermion ⓘ |
| isDescribedBy |
Dirac equation
ⓘ
quantum field theory ⓘ
surface form:
Quantum field theory
Relativistic quantum mechanics ⓘ |
| isDividedInto |
Leptons
ⓘ
Quarks ⓘ |
| namedAfter | Enrico Fermi ⓘ |
| obeys |
Pauli exclusion principle
ⓘ
spin–statistics theorem ⓘ
surface form:
Spin–statistics theorem
|
| playsRoleIn | Stability of matter ⓘ |
| roleInPhysics |
Constituent of atomic nuclei
ⓘ
Constituent of atoms ⓘ Constituent of ordinary matter ⓘ |
| statisticsContrastsWith | Bose–Einstein statistics ⓘ |
| subclassOf |
Composite particle
ⓘ
Elementary particle ⓘ |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.