Quark model predictions for hadrons
The influence of spontaneous chiral symmetry breaking on the properties of hadrons is a central question of hadron physics. We used a chiral quark model to calculate specific quantities (pion-pion and pion-photon vertices) which presumably are insensitive to confinement. The vertices were also calculated within a phenomenological hadronic meson exchange model. By matching the expressions for the vertices from the two models one gets quark model predictions for the masses and coupling constants of the mesons. Specifically we considered rho and a1 meson exchange. The resulting rho and a1 masses and coupling constants are in reasonable agreement with experiment.
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