New experiments on light kaonic atoms

Full text: The antikaon interaction on nucleons and nuclei in the low-energy regime is neither simple nor well understood. Even the kaonic hydrogen and kaonic deuterium cases are complicated due to sub-threshold resonances - most prominent is the Lambda(1405) resonance of still heavily debated nature. New experimental studies via x-ray spectroscopy of the lightest kaonic atomic systems (kaonic hydrogen and helium isotopes) have successfully performed by the SIDDHARTA Collaboration at LNF (Frascati, Italy) recently. Consequently new precision data on the strong interaction observables were delivered giving important impact for the theory. The talk will give an overview of the progress and present status of experimental studies and will provide an outlook to future perspectives in this fascinating research field. (author)