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Nonperturbative approach to effective chiral Lagrangians and meson interactions

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Nonperturbative approach to effective chiral Lagrangians and meson interactions

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Oller Berber, José Antonio; Oset Báguena, Eulogio; Peláez Sagredo, José Ramón

Aquest document és un/a article, creat/da en: 1998

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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