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Chiral dynamics of p-wave in K^- p and coupled states

D. Jido·E. Oset·A. Ramos
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Abstract

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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D. Jido, E. Oset, A. Ramos. 2002-08-06. Chiral dynamics of p-wave in K^- p and coupled states. https://doi.org/10.1103/physrevc.66.055203

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