LOW-ENERGY KAON NUCLEON/NUCLEI STUDIES AT DA phi NE: THE SIDDHARTA-2 EXPERIMENT

The experimental studies of light kaonic atoms offer the unique opportunity to investigate the kaon-nucleus interaction at threshold, performing experiments equivalent to scattering at vanishing relative energies without the need of an extrapolation. In this framework, the SIDDHARTA-2 experiment is going to perform the first measurement of kaonic deuterium 2p -> 1s transition, which is fundamental to extract the isospin-dependent antikaon- nucleon scattering lengths. The setup was installed on the DA phi NE collider of LNF-INFN in spring 2019 and is presently in optimization phase. The SIDDHARTA-2 data taking campaign for the kaonic deuterium is planned in 2020-2021.