Chiral dynamics in systems with strangeness

Details Chiral dynamics in systems with strangeness Chiral dynamics in systems with strangeness

2002-10-25

arxiv.org/abs/nucl-th/0210077v1

Few Body Syst.Suppl. 14 (2003) 263-268

Physics

Nuclear Physics

Nuclear Theory

Talk in the XVIII European Few Body Conference, Bled, Slovenia, September 2002

Scientific paper

In this talk a brief review of several problems involving systems with strangeness is made. In the first place one shows how the $\Lambda (1405)$, $\Lambda(1670)$ and $\Sigma(1620)$ states, for $S = -1$, and the $\Xi(1620)$ for $S= -2$ are generated dynamically in the context of unitarized chiral perturbation theory. The results for the $\bar{K}N$ interaction are then used to evaluate the $K^- d$ scattering length. Results obtained for the kaon selfenergy in a nuclear medium within this approach, with application to $K^-$ atoms, are also mentioned. Finally a few words are said about recent developments in the weak decay of $\Lambda$ hypernuclei and the puzzle of the $\Gamma_n/\Gamma_p$ ratio.

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