Aspects of Strangeness -1 Meson-Baryon Scattering

Details Aspects of Strangeness -1 Meson-Baryon Scattering Aspects of Strangeness -1 Meson-Baryon Scattering

2006-09-06

arxiv.org/abs/hep-ph/0609065v2

Eur.Phys.J.A31:527-533,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 figures, 3 figures, talk given in the IVth International Conference on Quarks and Nuclear Physics (QNP06), Madrid June 5th a

Scientific paper

10.1140/epja/i2006-10185-6

We consider meson-baryon interactions in S-wave with strangeness -1. This is a sector populated by plenty of resonances interacting in several two-body coupled channels. We consider a large set of experimental data, where the recent experiments are remarkably accurate. This requires a sound theoretical description to account for all the data and we employ Unitary Chiral Perturbation Theory up to and including O(p^2). The spectroscopy of our solutions is studied within this approach, discussing the rise from the pole content of two \Lambda(1405) resonances and of the \Lambda(1670), \Lambda(1800), \Sigma(1480), \Sigma(1620) and \Sigma(1750). We finally argue about our preferred fit.

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