V–A theory

E400603

V–A theory is a framework in particle physics that describes the weak interaction as involving only left-handed particles and right-handed antiparticles through a combination of vector (V) and axial-vector (A) currents.

All labels observed (1)

Label Occurrences
V–A theory canonical 1

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Statements (46)

Predicate Object
instanceOf theory in particle physics
weak interaction theory
appliesTo beta decay
muon decay
neutron decay
nuclear beta processes
chiralitySelection left-handed particles
right-handed antiparticles
compatibleWith Standard Model
surface form: Standard Model of particle physics
couplingType universal weak coupling constant
currentStructure vector minus axial-vector
describes weak interaction
excludes left-handed weakly interacting antiparticles
right-handed weakly interacting particles
explains maximal parity violation
parity violation in weak interactions
field particle physics
formalism four-fermion interaction at low energies
historicalContext developed in late 1950s
implies only left-handed neutrinos participate in weak interaction
only right-handed antineutrinos participate in weak interaction
includesCurrent axial-vector current
vector current
inspired development of gauge theory description of weak interaction
interactionType charged-current weak interaction
involves hadronic weak currents
leptonic weak currents
mathematicalForm V − A combination of currents
motivatedBy experimental discovery of parity violation
predecessorOf electroweak theory
proposedBy E. C. G. Sudarshan
Murray Gell-Mann
Richard Feynman
Robert Marshak
relatedTo Fermi constant
surface form: Fermi coupling constant

Fermi theory of beta decay
roleInStandardModel low-energy limit of charged-current weak interaction
status experimentally well confirmed
symmetryProperty violates charge–parity (CP) approximately conserved in charged current alone
violates parity symmetry
testedBy beta decay experiments
muon decay experiments
neutrino scattering experiments
usesConcept Dirac spinors
chiral projection operators
weak charged current

How these facts were elicited

Referenced by (1)

Full triples — surface form annotated when it differs from this entity's canonical label.