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The systematic low-energy expansion of QCD in momenta and light-quark masses using pions and, when included, nucleons as effective degrees of freedom.
wp-physics-chiral_perturbation_theorynlab-physics-chiral_perturbation_theoryepelbaum-nuclear-eftmachleidt-entem-nuclear-forcesEach relation below ends at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Chiral perturbation theory is organized by the approximate chiral symmetry, its spontaneous breaking pattern, momenta, and light-quark masses.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
pdg-qcdepelbaum-nuclear-eftThis is an authored directed relation from the source endpoint to the target endpoint.
Chiral perturbation theory is the low-energy EFT of QCD’s approximate chiral symmetry and its breaking.
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-chiral_perturbation_theorynlab-physics-chiral_perturbation_theorywp-physics-quantum_chromodynamicsnlab-physics-quantum_chromodynamicsEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
Nuclear chiral EFT extends the low-energy chiral expansion to nucleons, nuclear forces, and currents.
A more specific theory, model, entity class, or regime is obtained by restricting or extending the scope of a broader framework.
wp-physics-effective_field_theorynlab-physics-nuclear-eftwp-physics-chiral_perturbation_theorynlab-physics-chiral_perturbation_theoryThis is an authored directed relation from the source endpoint to the target endpoint.
Mesonic chiral perturbation theory describes pions as its principal low-energy degrees of freedom; baryonic variants also include nucleons.
A theory, law, or interaction describes the behavior of the target within a stated regime. The edge detail must state important limits or qualifications.
pdg-qcdepelbaum-nuclear-eft