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Bethe-Salpeter approach for meson-meson scattering in chiral perturbation theory

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Bethe-Salpeter approach for meson-meson scattering in chiral perturbation theory

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dc.contributor.author Nieves Pamplona, Juan Miguel
dc.contributor.author Ruiz Arriola, Enrique
dc.date.accessioned 2014-10-16T12:28:22Z
dc.date.available 2014-10-16T12:28:22Z
dc.date.issued 1999
dc.identifier.citation Nieves Pamplona, Juan Miguel Ruiz Arriola, Enrique 1999 Bethe-Salpeter approach for meson-meson scattering in chiral perturbation theory Physics Letters B 455 1-4 30 38
dc.identifier.uri http://hdl.handle.net/10550/39225
dc.description.abstract The Bethe-Salpeter equation restores exact elastic unitarity in the s-channel by summing up an infinite set of chiral loops. We use this equation to show how a chiral expansion can be undertaken by successive approximations to the potential which should be iterated. Renormalizability of the amplitudes in a broad sense can be achieved by allowing for an infinite set of counter-terms as it is the case in ordinary Chiral Perturbation Theory. Within this framework we calculate the pi pi scattering amplitudes both for s- and p-waves at lowest order in the proposed expansion where a successful description of the low-lying resonances (sigma- and rho) and threshold parameters is obtained. We also extract the SU(2) low energy parameters (l) over bar,(1,2,3,4) from our amplitudes.
dc.language.iso eng
dc.relation.ispartof Physics Letters B, 1999, vol. 455, num. 1-4, p. 30-38
dc.subject Física
dc.title Bethe-Salpeter approach for meson-meson scattering in chiral perturbation theory
dc.type journal article es_ES
dc.date.updated 2014-10-16T12:28:22Z
dc.identifier.doi 10.1016/S0370-2693(99)00461-X
dc.identifier.idgrec 068608
dc.rights.accessRights open access es_ES

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