A non-perturbative chiral approach for meson-meson interactions
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A non-perturbative chiral approach for meson-meson interactions

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A non-perturbative chiral approach for meson-meson interactions

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dc.contributor.author Oller Berber, José Antonio
dc.contributor.author Oset Báguena, Eulogio
dc.contributor.author Guerrero Cortina, Francisco
dc.contributor.author Peláez Sagredo, José Ramón
dc.date.accessioned 2015-09-04T07:48:17Z
dc.date.available 2015-09-04T07:48:17Z
dc.date.issued 2000
dc.identifier.uri http://hdl.handle.net/10550/46827
dc.description.abstract A non-perturbative method which combines constraints from chiral symmetry breaking and coupled channel unitarity is used to describe meson-meson interactions up to \sqrt{s}\lesssim 1.2 GeV, extending in this way the range of applicability of the information contained in Chiral Perturbation Theory (\chi PT), since this perturbative series is typically restricted to \sqrt{s}\lesssim 500 MeV. The approach uses the O(p^2) and O(p^4) \chiPT Lagrangians. The seven free parameters resulting from the O(p^4) Lagrangian are fitted to the experimental data. The approach makes use of the expansion of T^{-1} instead of the amplitude itself as done in \chiPT. The former expansion is suggested by analogy with the effective range approximation in Quantum Mechanics and it appears to be very useful. The results, in fact, are in good agreement with a vast amount of experimental analyses.
dc.language.iso eng
dc.relation.ispartof Nuclear Physics A, 2000, vol. 663, p. 991C-994C
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Oller Berber, José Antonio Oset Báguena, Eulogio Guerrero Cortina, Francisco Peláez Sagredo, José Ramón 2000 A non-perturbative chiral approach for meson-meson interactions Nuclear Physics A 663 991C 994C
dc.subject Física
dc.title A non-perturbative chiral approach for meson-meson interactions
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-09-04T07:48:17Z
dc.identifier.doi http://dx.doi.org/10.1016/S0375-9474(99)00751-4
dc.identifier.idgrec 079413

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