Oller, J. A.Oset, E.Peláez Sagredo, José Ramón2023-06-202023-06-201998-03-200031-900710.1103/PhysRevLett.80.3452https://hdl.handle.net/20.500.14352/60096© 1998 The American Physical Society. One of us (J. R. P.) thanks the University of Valencia, where this work was carried out, for their kind hospitality. We thank A. Pich and M. R. Pennington for useful comments. J. A. O. acknowledges financial support from the Generalitat Valenciana. This work was partially supported by CICYT under Contracts No. PB96-0753 and No. AEN93-0776.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 √2≅1.2 GeV, dynamically generating the σ , f_0 α_0, ρ, and K* resonances. Further applications are also proposed.engjournal articlehttp://dx.doi.org/10.1103/PhysRevLett.80.3452http://journals.aps.orgopen access51-73Perturbation-theorySectorScatteringFísica-Modelos matemáticosFísica matemática