Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

Oller, J. A.; Oset, E.; Pelaez, J. R.

Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

Authors

Oller, J. A.

Oset, E.

Pelaez, J. R.

Description

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.
References corrected, to be published in Physical Review Letters