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.
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Physical concept
→
Type of particle → |
| appearsIn |
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 → Relativistic quantum mechanics → |
| isDividedInto |
Leptons
→
Quarks → |
| namedAfter |
Enrico Fermi
→
|
| obeys |
Pauli exclusion principle
→
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 (1)
| Subject (surface form when different) | Predicate |
|---|---|
|
Enrico Fermi
→
|
hasEponym |