Freiburg 2008 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Niederenergie-Neutrinophysik und Suche nach Dunkler Materie I

T 86.3: Talk

Monday, March 3, 2008, 17:20–17:35, KGII-HS 2004

New Results from the CDMS-II experiment — •Tobias Bruch for the CDMS collaboration — University of Zurich, Switzerland

The Cryogenic Dark Matter Search experiment (CDMS-II) operates Ge and Si detectors at cryogenic temperatures, to detect non-luminos, non-baryonic Weakly Interacting Massive Particles (WIMPs), that could form the majority of the matter in the Universe, via their elastic scattering off nuclei. The CDMS-II experiment currently runs 5 Towers (30 detectors) with a total mass of 4.75 kg (1.1 kg) Ge (Si), at the Soudan Underground Laboratory. By analyzing the phonon and ionization signal of an interaction in the crystals, the CDMS-II experiment achieved a background free signal window. CDMS-II has been in WIMP search data taking mode from October 2006 to July 2007 accumulating 650 kg days of raw exposure in Ge. The analysis of this data, using new analysis parameters and techniques, result in an increased sensitivity on the WIMP-nucleus scattering cross section with respect to the 90% CL limit of 1.6e-43 cm² at a WIMP mass of 60 GeV achieved in earlier runs. We will pesent the latest results along with the implications for theoretical WIMP models.