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A local four-fermion theory approximating charged-current weak processes at momentum transfers far below the -boson mass.
wp-physics-fermi_theorynlab-physics-fermi_beta_decaypdg-standard-modelburgess-eftEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Fermi’s interaction theory incorporated the neutrino and supplied a dynamical account of beta spectra.
The source experiment, observation, anomaly, or problem materially motivated the development, revision, or acceptance of the target concept. Historical influence is not logical derivation; the edge detail states the documented role and avoids retrospective origin myths.
wp-physics-beta_decaynobel-neutrino-advancedThis is an authored directed relation from the source endpoint to the target endpoint.
At momentum transfer much smaller than , charged-current weak exchange is approximated by local four-fermion operators.
The target retains the degrees of freedom and interactions relevant below a stated scale or within a stated regime, while higher-energy or unresolved degrees of freedom from the source are integrated out, coarse-grained, or encoded in effective couplings.
wp-physics-fermi_theorynlab-physics-fermi_beta_decaywp-physics-electroweak_theorynlab-physics-electroweak_theoryThis is an authored directed relation from the source endpoint to the target endpoint.
Fermi theory is built from local four-fermion charged-current operators.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
wp-physics-four_fermion_interactionwp-physics-fermi_theoryEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Fermi theory gives the leading local weak description of beta decay below the scale.
A theory, law, or interaction describes the behavior of the target within a stated regime. The edge detail must state important limits or qualifications.
wp-physics-beta_decayiaea-ensdfwp-physics-fermi_theorynlab-physics-fermi_beta_decayThis is an authored directed relation from the source endpoint to the target endpoint.
Fermi four-fermion interactions are leading weak-operator components within the broader low-energy effective field theory.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
jhep-lefttong-standard-model