Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions
J. A. Oller, E. Oset, J. R. Pelaez
Abstract
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 sqrts=1.2 GeV, dynamically generating the sigma, f0, a0,rho and K* resonances. Further applications are also proposed.
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