INTERMEDIATE MASS KAONIC ATOMS AT DAΦNE

The SIDDHARTA-2 Collaboration aims to measure for the first time the shift and width induced on the 1s level of kaonic deuterium by the strong interaction. In the preliminary phase to the experiment, a test run using a Helium-4 target was performed to optimize the performance of the full experimental apparatus. This preliminary study highlighted the possibility to measure transition lines coming from intermediate-mass kaonic atoms, such as kaonic carbon and kaonic aluminum. In order to measure transitions where strong interaction is manifesting at higher energies, out of the energy range of the SIDDHARTA-2 apparatus, the collaboration is testing a new detector system which exploits a novel compound semiconductor, the cadmium–zinc–telluride. Tests are now running at DAΦNE to study the performance of this detector, exploring the possibility to build a dedicated setup.