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Composite-meson model with vector dominance based onU(2) invariant four-quark interactions

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Zeitschrift für Physik C Particles and Fields


An effective Lagrangian for composite σ, π, ω and ρ mesons is derived from a four-quark theory of the Nambu-Jona-Lasinio type. We study the various mutual relations between the renormalized parameters of this model. If electro-weak interactions are added, the model provides a dynamical foundation of vector-meson dominance.

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Ebert, D., Volkov, M.K. Composite-meson model with vector dominance based onU(2) invariant four-quark interactions. Z. Phys. C - Particles and Fields 16, 205–210 (1983).

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