Narrow Results

This talk presents the results of recent experimental searches for antikaon-nuclear bound systems on different nuclei, performed with the FINUDA spectrometer at the DAφNE φ-factory (Frascati,Italy).

Data taking for the KLOE experiment at the DAΦNE ϕ factory was completed in 2005, with the acquisition of ~2.5 fb^-1 of luminosity integrated at the ϕ peak. From the analysis of a ~ 400-pb^-1 subsample, by far the most precise test of the validity of the time evolution of kaon pairs predicted by quantum mechanics has been obtained. Moreover, the sensitivity to possible violations of the CPT symmetry has been sizeably improved by exploiting the unitarity relation while including recent results from the KLOE experiment. Perspectives on results that will be obtained from the analysis of the final data set are briefly discussed.

The following sections are included:

• Introduction

• Neutron Star Model

• Relativistic Mean Field Model with Kaons (Pions)

• Conclusions

• Bibliography

The present status of kaon photo- and electroproduction on the nucleon is briefly reviewed. Some current important issues in this field are discussed.

Recent progress on the precision laser spectroscopy of antiprotonic helium atoms, as well as on the x-ray spectroscopy of kaonic helium atoms are presented. These two may appear to be unrelated topics (except for the fact that both being exotic helium atoms), but in fact a past study of kaonic helium system led to the serendipitous discovery of antiprotonic helium. Some historical background connecting these two exotic helium atoms, as well as future prospects are discussed.