We develop a coupled channel unitary approach describing the behavior at higher energies of systems whose low-energy dynamics is given by effective O(p²) and O(p⁴) chiral Lagrangians. Our free parameters are those of the O(p⁴) Lagrangian. When applied to the meson-meson interaction, it yields a remarkable agreement with data up to √s1.2GeV, dynamically generating the σ, f₀, a₀, ρ, and K* resonances. Further applications are also proposed.
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Oller et al. (1998) studied this question.
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