A non-perturbative chiral approach for meson-meson interactions
نویسندگان
چکیده
منابع مشابه
Meson-Meson interaction in a non-perturbative chiral approach
A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe the meson-meson interaction up to about 1.2 GeV. The approach uses the O(p2) and O(p4) chiral Lagrangians. The seven free parameters of the O(p4) Lagrangian are fitted to the data. The results are in good agreement with a vast amount of experimental analyses. The ...
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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) and O(p) chiral Lagrangians. Our free parameters are those of the O(p) Lagrangian. When applied to the meson-meson interaction, it yields a remarkable agreement with data up to √ s ' 1.2 GeV, dynamically generating the σ, f0, a0, ρ and K ∗ reso...
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A qualitative account of the meson-meson and meson-baryon interactions using chiral Lagrangians and the inverse amplitude method in coupled channels is done. The method, imposing exact unitarity, proves to be a very useful tool to extend the information contained in the chiral Lagrangians at energies beyond the realm of applicability of chiral perturbation theory.
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A qualitative account of the meson-meson and meson-baryon interactions using chiral Lagrangians and the inverse amplitude method in coupled channels is done. The method, imposing exact unitarity, proves to be a very useful tool to extend the information contained in the chiral Lagrangians at energies beyond the realm of applicability of chiral perturbation theory.
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We report on recent nonperturbative techniques that combine the information of chiral Lagrangians (with and without resonances) with unitarity in coupled channels and other requirements of the S-matrix theory of the strong interactions. As a result, the region of applicability of such techniques is much larger than the one of Chiral Perturbation Theory allowing one to study also resonance physi...
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ژورنال
عنوان ژورنال: Nuclear Physics A
سال: 2000
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(99)00751-4