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

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

2002-08-06

arxiv.org/abs/nucl-th/0208010v1

Phys.Rev. C66 (2002) 055203

Physics

Nuclear Physics

Nuclear Theory

LaTeX, 18 pages, 6 figures

Scientific paper

10.1103/PhysRevC.66.055203

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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