J. Ninkovic

Limits on WIMP dark matter using scintillating CaWO4 cryogenic detectors with active background suppression

We present first significant limits on WIMP dark matter by the phonon-light technique, where combined phonon and light signals from a scintillating cryogenic detector are used. Data from early 2004 with two 300xa0g CRESST-II prototype detector modules are presented, with a net exposure of 20.5xa0kg days. The modules consist of a CaWO4 scintillating “target” crystal and a smaller cryogenic light detector. The combination of phonon and light signals leads to a strong suppression of non-nuclear recoil backgrounds. Using this information to define an acceptance region for nuclear recoils we have 16 events from the two modules, corresponding to a rate for nuclear recoils between 12 and 40xa0keV of (0.87xa0±xa00.22) events/(kgxa0day). This is compatible with the rate expected from neutron background, and most of these events lie in the region of the phonon-light plane anticipated for neutron-induced recoils. A particularly strong limit for WIMPs with coherent scattering results from selecting a region of the phonon-light plane corresponding to tungsten recoils, where the best module shows zero events.

Detection of the natural {alpha} decay of tungsten

The natural

Detection of the naturalαdecay of tungsten

ensuremath{alpha}

Results and status of the CRESST experiment

-decay of

Cresst-II: dark matter search with scintillating absorbers

^{180}mathrm{W}

Dark-matter search with CRESST

has been unambiguously detected for the first time. The

CRESST cryogenic dark matter search

ensuremath{alpha}

CRESST – status and future

peak is found in a (

CRESST: First results with the phonon-light technique

ensuremath{gamma}

CRESST II BACKGROUND DISCRIMINATION: DETECTION OF 180W NATURAL DECAY IN A PURE α-SPECTRUM

,