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Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

J. A. Oller·E. Oset·J. R. Pelaez
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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(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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J. A. Oller, E. Oset, J. R. Pelaez. 1998-03-30. Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions. https://doi.org/10.1103/physrevlett.80.3452

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