WEBINAR: Cryogenic dark matter searches - CRESST and COSINUS
by Dr. Florian Reindl (HEPHY - ÖAW, Atominstitut - TU Wien)
This SMI-Seminar will be the first held as a video-conference.
Today, direct searches for interaction of dark matter particles in earth-bound detectors apply a large variety of different technologies to probe a wide range of potential dark matter particle masses. Cryogenic detectors play a key role in this endeavor due to their low threshold and, thus, their high sensitivity for light dark matter particles. The CRESST experiment is located at the Italian Gran Sasso underground laboratory (LNGS) and operates CaWO4 crystals at mK-temperatures. In this talk I will present recent results obtained with a detector with an unprecedented low nuclear recoil threshold of 30.1eV pushing the sensitivity to dark matter particles as light as 160 MeV.
COSINUS is a new experiment based on CRESST technology, but aims to perform a cross-check of the long-standing dark matter claim by the DAMA/LIBRA collaboration. They observe an annual modulation of the event rate which agrees in period and phase with the expectation for dark matter. To make the cross-check model-independent, COSINUS uses - like DAMA/LIBRA - NaI crystals as target material, but COSINUS operates them as scintillating cryogenic calorimeters. This operating mode not only provides a lower nuclear recoil threshold, but also yields particle identification on event-by-event basis, both unique features for NaI-based detectors.