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The spectroscopy of light mesonsA review is given of the most recent experimental data on light meson resonances together with a phenomenological analysis incorporating all the basic ideas of QCD. The following topics are discussed in greater detail: (1) the scalar meson problem; (2) the axial meson problem; (3) spin-spin and spin-orbit splitting in meson multiplets; (4) SUf3f3 and OZI (Okubo--Zweig--Iizuka) breaking in meson spectra and decays; (5) SUf3f3 breaking in Regge trajectories and in radial excitations; (6) quark mixing in isoscalar mesons (ηη-η′, ω-φ, f-f′); (7) experimental determinations of the η-η′ mixing angle, and (8) radiative decays of vector and pseudoscalar mesons.
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