The EDELWEISS direct detection experiment uses cryogenic Ge semiconductor detectors to search for sub-GeV dark matter (DM) particles. With its low gap energy, germanium is an excellent target to explore DM particles interactions with nucleons in the sub-GeV range, and DM-electron interactions in the MeV range, as well as search for the absorption of eV-scale dark photons. The collaboration has recently obtained the first Ge-based constraints on sub-MeV dark DM particles interacting with electrons using a 33.4 g Ge cryogenic detector prototype with a 0.53 electron-hole pair (rms) resolution, operated underground at the Laboratoire Souterrain de Modane.
These results will be presented, as well as the EDELWEISS-SubGeV plans to achieve lower threshold and more efficient particle identification at low energy.
The DAMIC experiment exploits the exceptional energy and spatial resolution of charge coupled devices (CCDs) to search for dark matter particles. We present the latest results from the 11 kg-day
exposure collected with the DAMIC detector at SNOLAB. We build on previous analyses to distinguish between bulk and surface backgrounds to construct a robust radioactive background model down to energies as low as 50 eV. We compare the observed spectrum of events to the background-model prediction to search for an excess bulk signal, as would be expected from dark matter.
The Cryogenic Underground Observatory for Rare Events (CUORE), hosted at the Laboratori Nazionali del Gran Sasso in Italy, is the first tonne-scale cryogenic experiment searching for neutrinoless double-beta decay (0nuDBD) of 130Te. The observation of this process would prove that lepton number is not a symmetry of nature and that neutrinos are Majorana particles. CUORE, started in 2017, is currently in stable data taking: a raw exposure of ~ 1 tonne yr has recently been achieved. In this talk, the most recent results of CUORE for the 0nuDBD channel as well as for other physical processes of interest (2nuDBD, decays to excited states,..) will be presented, together with a review of the detector features and performance.