Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

Details Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions Non-perturbative Approach to effective chiral Lagrangians and Meson Interactions

1998-03-04

arxiv.org/abs/hep-ph/9803242v2

Phys.Rev.Lett.80:3452-3455,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

References corrected, to be published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.80.3452

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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