S=-1 meson-baryon unitarized coupled channel chiral perturbation theory and the S-01 resonances Lambda(1405) and -Lambda(1670)
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S=-1 meson-baryon unitarized coupled channel chiral perturbation theory and the S-01 resonances Lambda(1405) and -Lambda(1670)

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S=-1 meson-baryon unitarized coupled channel chiral perturbation theory and the S-01 resonances Lambda(1405) and -Lambda(1670)

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dc.contributor.author García Recio, Carmen
dc.contributor.author Nieves Pamplona, Juan Miguel
dc.contributor.author Ruiz Arriola, Enrique
dc.contributor.author Vicente Vacas, Manuel José
dc.date.accessioned 2014-10-20T08:08:42Z
dc.date.available 2014-10-20T08:08:42Z
dc.date.issued 2003
dc.identifier.uri http://hdl.handle.net/10550/39252
dc.description.abstract The s-wave meson-baryon scattering is analyzed for the strangeness S=-1 and isospin I=0 sector in a Bethe-Salpeter coupled channel formalism incorporating chiral symmetry. Four channels have been considered: piSigma, (K) over barN, etaLambda, and KXi. The required input to solve the Bethe-Salpeter equation is taken from lowest order chiral perturbation theory in a relativistic formalism. There appear undetermined low energy constants, as a consequence of the renormalization of the amplitudes, which are obtained from fits to the piSigma-->piSigma mass spectrum, to the elastic (K) over barN-->(K) over barN and (K) over barN-->piSigma t matrices and to the K(-)p-->etaLambda cross section data. The position and residues of the complex poles in the second Riemann sheet of the scattering amplitude determine the masses, widths, and branching ratios of the S-01 resonances Lambda(1405) and -Lambda(1670), in reasonable agreement with experiment. A good overall description of the data, from the piSigma threshold up to 1.75 GeV, is achieved despite the fact that three-body channels have not been explicitly included.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2003, vol. 67, num. 7, p. 076009
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source García Recio, Carmen Nieves Pamplona, Juan Miguel Ruiz Arriola, Enrique Vicente Vacas, Manuel José 2003 S=-1 meson-baryon unitarized coupled channel chiral perturbation theory and the S-01 resonances Lambda(1405) and -Lambda(1670) Physical Review D 67 7 076009
dc.subject Física
dc.title S=-1 meson-baryon unitarized coupled channel chiral perturbation theory and the S-01 resonances Lambda(1405) and -Lambda(1670)
dc.type info:eu-repo/semantics/article
dc.date.updated 2014-10-20T08:08:42Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.67.076009
dc.identifier.idgrec 068592

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