Amplitude analysis ofK̅ N scattering

César Fernández-Ramírez
2016 Journal of Physics, Conference Series  
We 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 $S=-1$
more » ... ture 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.
doi:10.1088/1742-6596/730/1/012010 fatcat:phjywgasyjbqrgjdgolv35s2yy