28 July 2020 to 6 August 2020
virtual conference
Europe/Prague timezone

Searches for dark matter with the CRESST III-Experiment

31 Jul 2020, 10:20
25m
virtual conference

virtual conference

Talk 09. Dark Matter Detection Dark Matter Detection

Speaker

Jochen Schieck (Austrian Academy of Sciences (AT))

Description

CRESST-III is a cryogenic dark matter experiment operated at the Gran Sasso laboratory in Italy. The primary research interest is the search for dark matter in the sub-GeV/$c^{2}$ mass region. Dark matter particles are detected by measuring the nuclear recoil energy from the elastic scatter with the dark matter particle. The experimental challenge for reaching such a low mass region is to achieve the lowest possible energy detection threshold. Currently CRESST-III has obtained an energy detection threshold of 30.1 eV. The target material is a 23.6g CaWO4-crystal operated at a temperature of about 15 mK and using a dual read-out scheme. By measuring the phonons and the scintillation light an active background suppression can be reached. We will present the spin-independent results from direct dark matter searches with a sensitivity for dark matter masses down to 160 MeV/$c^{2}$. We will discuss a GEANT4 based electromagnetic background model to evaluate the content and the composition of the background. Currently 68+-16% of the overall background can be explained by this model. The latest R&D efforts are presented and an outlook of the future stages of the experiment will be given.

Primary authors

Jochen Schieck (Austrian Academy of Sciences (AT)) for the CRESST collaboration

Presentation Materials