Search for Dark Matter at keV energies with the GERDA experiment

The GERDA experiment consists of an array of enriched ⁷⁶Ge-detectors, surrounded by a liquid argon cryostat, which also acts as an active shielding. Located in the Laboratori Nazionali del Gran Sasso, an underground laboratory in Italy, it is shielded by 1400m of rock and after the careful selection of low background materials, it is one of the least radioactive places on earth. Its main goal is the detection of neutrinoless double beta decay, which would shed light on the nature and mass scale of the neutrino. However, its low background and high energy resolution make it a perfect environment to search also for other extremely rare processes. This study focuses on the capabilities of GERDA to detect narrow spectral lines at energies below 1 MeV to search for example for bosonic superweakly interacting massive particles, a dark matter candidate with keV scale mass.