direct dark-matter searches with cryogenic solid state ......bubble chamber operated in a deep...
TRANSCRIPT
Direct dark-matter searches with cryogenic solid state detectorsand bubble chambers
09/01/2015
• Program:
– Germanium detectors at 77 K– Bolometers at mK temperatures– Searches using bubble chambers
• Literature:
– N. Booth et al., Low-temperature particle detectors, A. Rev. Nucl. Part. Sci. 46 (1996) 471– Z. Ahmed et al., (CDMS Collaboration) Search for Weakly Interacting Massive Particles
with the First Five-Tower Data from the Cryogenic Dark Matter Search at the Soudan Under-ground Laboratory, Phys. Rev. Lett. 102 (2009) 011301
– R. Agnese et al. (SuperCDMS Collaboration) Search for Low-Mass Weakly InteractingMassive Particles with SuperCDMS, Phys. Rev. Lett. 112 (2014) 241302
– G. Angloher et al., (CRESST-II Collaboration), Results on low mass WIMPs using an up-graded CRESST-II detector, Eur. Phys. J. C 74 (2014) 3184
– E. Behnke et al., Spin-Dependent WIMP limits from a bubble chamber, Science 319 (2008)933
– E. Behnke et al., (COUPP Collaboration) First dark matter search results from a 4-kg CF3Ibubble chamber operated in a deep underground site, Phys. Rev. D 86 (2012) 052001
• Material for the lecture:
Figure 1: Edelweiss-III detector design. Photograph (right) and scheme of the interleaved elec-trodes to reduce surface events. Figures from Edelweiss presentations.
Figure 2: Left: discrimination parameters for the CDMS detector: ionisation yield and timingparameter for electronic recoils, nuclear recoils and surface events. Figure from CDMS Collabo-ration, Phys. Rev. Lett. 102 (2009) 011301 . Right: CRESST results (red) on low WIMP masses.Figure from CRESST-II Collaboration, Eur. Phys. J. C 74 (2014) 3184.
Figure 3: Events in a superheated-liquid bubble chamber of 1.5 kg mass of CF3I. A: muon track at∼ 60◦, B: nuclear recoils from neutrons at ∼ 30◦, C: expected signature of a WIMP interaction, asingle nuclear recoil bubble. Figure from E. Behnke et al., Science 319 (2008) 933.
Figure 4: Spin dependent (proton coupling) results from various experiments. Figure fromCOUPP Collaboration, Phys. Rev. D 86 (2012) 052001.