Chiral dynamics of the $\Lambda (1520)$ in coupled channels tested in the $K^{-}p\to \pi \pi \Lambda$ reaction

Abstract

The $\Lambda (1520)$ resonance is generated dynamically in a unitary coupled channel framework with the $\pi {\Sigma }^{\ast }$ and $K{\Xi }^{\ast }$ channels in s-wave and $\pi \Sigma$ and $\bar{K}N$ channels in d-wave. The dynamics of this resonance close to and above threshold is then tested through the reactions $K^{-}p\to \pi \pi \Lambda$ and a good agreement with the experimentally measured cross section is observed.

Talk given at the Particle and Nuclei International Conference (PANIC 2005), 24-28 October 2005, Santa Fe, NM