https://doi.org/10.1140/epjc/s10052-014-3184-9
Letter
Results on low mass WIMPs using an upgraded CRESST-II detector
1
Max-Planck-Institut für Physik, 80805, Munich, Germany
2
Departamento de Fisica, Universidade de Coimbra, 3004 516, Coimbra, Portugal
3
INFN, Laboratori Nazionali del Gran Sasso, 67010, Assergi, Italy
4
Physik-Department, Technische Universität München, 85747, Garching, Germany
5
Walther-Meißner-Institut für Tieftemperaturforschung, 85748, Garching, Germany
6
Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, 1050, Wien, Austria
7
Atominstitut, Vienna University of Technology, 1020, Wien, Austria
8
Eberhard-Karls-Universität Tübingen, 72076, Tübingen, Germany
9
Department of Physics, University of Oxford, Oxford, OX1 3RH, UK
* e-mail: freindl@mpp.mpg.de
Received:
14
July
2014
Accepted:
16
November
2014
Published online:
9
December
2014
The CRESST-II cryogenic dark matter search aims for the detection of WIMPs via elastic scattering off nuclei in CaWO$$_4$$ crystals. We present results from a low-threshold analysis of a single upgraded detector module. This module efficiently vetoes low energy backgrounds induced by $$\alpha $$-decays on inner surfaces of the detector. With an exposure of 29.35 kg live days collected in 2013 we set a limit on spin-independent WIMP-nucleon scattering which probes a new region of parameter space for WIMP masses below 3 GeV/c$$^2$$, previously not covered in direct detection searches. A possible excess over background discussed for the previous CRESST-II phase 1 (from 2009 to 2011) is not confirmed.
© SIF and Springer-Verlag Berlin Heidelberg, 2014