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The lightest meson isotriplet, central to low-energy QCD and the long-range part of the nuclear force.
wp-physics-pionnlab-physics-pionpdg-quark-modelepelbaum-nuclear-eftEach relation below ends at this concept.
This 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-eftThis is an authored directed relation from the source endpoint to the target endpoint.
Pions are the lightest mesons.
The target is a member or subtype of the broader source class.
wp-physics-pionnlab-physics-pionwp-physics-mesonpdg-quark-modelThis is an authored directed relation from the source endpoint to the target endpoint.
The pions are the lightest pseudo-Nambu–Goldstone mesons of approximate QCD chiral symmetry.
The target is a member or subtype of the broader source class.
pdg-qcdtong-standard-modelpdg-quark-modelEach relation below starts at this concept.
This is an authored directed relation from the source endpoint to the target endpoint.
The charged and neutral pions form an approximate isospin triplet.
The target represents a state, property, observable, or state-dependent description associated with the source system or theory.
wp-physics-isospinnlab-physics-isospinThis is an authored directed relation from the source endpoint to the target endpoint.
Pion exchange produces the longest-range component of the nucleon–nucleon interaction.
The source supplies a substantive formal ingredient, dynamical sector, law, field content, or mechanism of the target theoretical framework.
wp-physics-residual_strong_interactionwp-physics-pionnlab-physics-pionThis is an authored directed relation from the source endpoint to the target endpoint.
Emulsion tracks distinguished the pion and its decay to a muon.
The source theory, law, entity, prediction, or structural claim is directly tested, supported, constrained, or established by the target experiment or observation. Experimental support is not final logical proof; the edge detail states exactly what was measured.
wp-physics-pionnobel-pionpdg-rpp