Other
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvd..79f1101l&link_type=abstract
Physical Review D, vol. 79, Issue 6, id. 061101
Other
34
Dark Matter, Neutrino, Muon, Pion, And Other Elementary Particle Detectors, Cosmic Ray Detectors, Neutrino, Muon, Pion, And Other Elementary Particles, Cosmic Rays, Galactic Halo
Scientific paper
An energy threshold of (220±10)eV was achieved at an efficiency of 50% with a four-channel ultralow-energy germanium detector, each with an active mass of 5 g. This provides a unique probe to weakly interacting massive particles (WIMP) dark matter with mass below 10 GeV. With a data acquisition live time of 0.338 kg-day at the Kuo-Sheng Laboratory, constraints on WIMPs in the galactic halo were derived. The limits improve over previous results on both spin-independent WIMP-nucleon and spin-dependent WIMP-neutron cross-sections for WIMP mass between 3 and 6 GeV. Sensitivities for full-scale experiments are projected. This detector technique makes the unexplored sub-keV energy window accessible for new neutrino and dark matter experiments.
Deniz Muhammed
Fang Beixiang
He Duanwei
Li Hai-Bo
Li Jiying
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