Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

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  • 4 March 1998
Abstract
We develop a coupled channel unitarity approach describing the behaviour at higher energies of systems whose low-energy dynamics is given by effective O(p^2) and O(p^4) chiral Lagrangians. Our free parameters are those of the O(p^4) Lagrangian. When applied to the meson-meson interaction, it yields a remarkable agreement with data up to sqrt(s)=1.2 GeV, dynamically generating the \sigma, f_0, a_0, \rho and K^* resonances. Further applications are also proposed.

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