The search of antikaon nuclear bound states, recent results from FINUDA

New data from the K-stopA absorption reaction on light nuclei (6,7Li, 9Be and 12C) have been collected by the FINUDA spectrometer, running at the DAΦNE φ-factory, in Laboratori Nazionali di Frascati (Italy). Data on K- nuclear absorption with the emission of hyperons together with nucleons are scarce. Further experimental studies on their possible correlations are awaited, in order to clarify the mechanism of kaon absorption on multibaryonic systems and the possible existence of K--nucleons aggregates. According to a few recent theoretical calculations the existence of states where the kaon is bound to two or three nucleons, or even more, is foreseen. These systems are expected to be 20-30 MeV narrow, with binding energies as large as 50-100 MeV. Their observation has been a little elusive so far. With FINUDA, the possibility to fully reconstruct all the particles coming from the decay of a possible bound kaonic system can be exploited, to study the existence of such states through their invariant mass spectra. In this talk an overview of the most recent results obtained so far by FINUDA in the study of the existence of K-nuclear bound states is reported.