Isospin Symmetry Breaking and the ρ-ω-System
H. Fritzsch, A. S. Muller
Abstract
Simple quark models for the low lying vector mesons suggest a mixing between the u- and d-flavors and a violation of the isospin symmetry for the ρ-ω- system much stronger than observed. It is shown that the chiral dynamics, especially the QCD anomaly, is responsible for a restoration of the isospin symmetry in the ρ-ω-system.
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