17-22 July 2016
Master Cutlers Hall
Europe/London timezone

Search for low-mass WIMPs with CRESST

19 Jul 2016, 11:00
20m
Venue: Cutlers' Main Hall (First Floor); Chair: Karl van Bibber; Session Managers: David Woodward & Jost Migenda ()

Venue: Cutlers' Main Hall (First Floor); Chair: Karl van Bibber; Session Managers: David Woodward & Jost Migenda

Speaker

Dr. Paolo Gorla (Laboratori Nazionali del Gran Sasso - INFN)

Description

The CRESST-III (Cryogenic Rare Event Search with Superconducting Thermometers) experiment, located in the Gran Sasso underground laboratory (LNGS, Italy), aims at the direct detection of dark matter (DM) particles. Scintillating CaWO$_{4}$ crystals operated as cryogenic detectors are used as target material for elastic DM-nucleus scattering. The simultaneous measurement of the phonon signal from the CaWO$_{4}$ crystal and the emitted scintillation light in a separate cryogenic light detector is used to discriminate backgrounds from a possible dark matter signal. This technology is particularly sensitive to small energy deposits induced by light dark matter particles, allowing the experiment to probe the low-mass region of the parameter space for spin-independent DM-nucleus scattering with high sensitivity.  Most recent results from the CRESST-II experiment are presented, setting the world best limit for masses < 1.7 GeV/c$^{2}$, with an nuclear recoil energy threshold of 307 eV. In the CRESST-III experiment each detector module consists of a ~ 24 g CaWO$_{4}$ target crystal and a 20x20 mm2 Silicon-on-Sapphire light detector. This configuration will allow to reach an energy threshold of ~100 eV. In phase 1 of the CRESST-III experiment, 10 detector modules with a total target mass of 240 g will be operated. The experiment is currently in its commissioning phase and data-taking is expected in 2016. The status of the experiment and the projections of the sensitivity on spin-independent DM-nucleus scattering for the current phase and for the future upgrades are also presented.

Primary author

Dr. Paolo Gorla (Laboratori Nazionali del Gran Sasso - INFN)

Presentation Materials

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