Physics – Nuclear Physics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aps..dnp.cg001s&link_type=abstract
American Physical Society, Division of Nuclear Physics Annual Meeting, October 25-28, 2006, abstract #CG.001
Physics
Nuclear Physics
Scientific paper
Astrophysical observations indicate that about 80% of the mass of the universe is in the form of non-baryonic particles beyond the standard model of particle physics. One exciting and well motivated candidate is weakly interacting massive particles (WIMPs) left over from the Big Bang. Direct detection of these particles requires sophisticated detectors to defeat much higher-rate backgrounds due to radioactivity and other sources. Promising techniques identify individual interactions in shielded fiducial volumes and distinguish nuclear-recoil signal candidates from electron-recoil backgrounds, based on the timing, energy density, and/or the division of the energy into signals of ionization, scintillation, or phonons. I will review the techniques of the dozens of experiments searching for WIMPs and summarize the most interesting results of experiments not being discussed in greater detail at this symposium.
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