KN scattering and the hyperon spectrum

I present the results of a coupled-channel model for $\bar{K}N$
scattering in the resonance region. The model fulfills unitarity, has the
correct analytical properties for the amplitudes and the partial waves
have the right threshold behavior. The parameters of the model have been
established by fitting single-energy partial waves up to $J=7/2$ and up to
2.15 GeV of center-of-mass energy. The $\Lambda^*$ and $\Sigma^*$ spectra
has been obtained, providing
a comprehensive picture of the $S=-1$ hyperon spectrum. We use the
structure of the hyperon spectrum and Regge phenomenology to gain insight
on the nature of the $\Lambda(1405)$ resonances. I will also comment on
how we are applying the model to improve current analysis for pentaquark
searches at LHCb.