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Chiral dynamics of the p wave in K(-)p and coupled states

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Chiral dynamics of the p wave in K(-)p and coupled states

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Jido, D.; Oset Báguena, Eulogio; Ramos Gómez, Àngels

Aquest document és un/a article, creat/da en: 2002

We perform an evaluation of the p-wave amplitudes of meson-baryon scattering in the strangeness S=-1 sector starting from the lowest order chiral Lagrangians and introducing explicitly the Sigma^* field with couplings to the meson-baryon states obtained using SU(6) symmetry. The N/D method of unitarization is used, equivalent, in practice, to the use of the Bethe-Salpeter equation with a cut-off. The procedure leaves no freedom for the p-waves once the s-waves are fixed and thus one obtains genuine predictions for the p-wave scattering amplitudes, which are in good agreement with experimental results for differential cross sections, as well as for the width and partial decay widths of the Sigma^*(1385).

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