New limits on spin-independent and spin-dependent couplings of low-mass WIMP dark matter with a germanium detector at a threshold of 220 eV

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dc.creatorTEXONO Collaboration
dc.creatorLin, S. T.
dc.date2007-12-11
dc.date2008-10-03
dc.date.accessioned2026-07-07T12:54:59Z
dc.date.available2026-07-07T12:54:59Z
dc.descriptionAn energy threshold of (220+-10) eV was achieved at an efficiency of 50% with a four-channel ultra-low-energy germanium detector each with an active mass of 5 g. This provides a unique probe to 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 the spin-independent WIMP-nucleon and the spin-dependent WIMP-neutron cross-sections for WIMP mass between 3-6 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. Two appendices are included after Version-3 to address questions raised on trigger and selection efficiencies as well as other issues.
dc.descriptionMain Text: 5 pages, 1 table, 6 figures ; V1 -- spin-independent bounds ; V2 -- include spin-dependent bounds ; V3 -- Two appendices added to address questions raised ; V4 -- fixed technical errors
dc.identifierhttps://arxiv.org/abs/0712.1645
dc.identifierhttp://arxiv.org/abs/0712.1645
dc.identifierPhys.Rev.D79:061101,2009
dc.identifierdoi:10.1103/PhysRevD.79.061101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224126
dc.subjectHigh Energy Physics - Experiment
dc.titleNew limits on spin-independent and spin-dependent couplings of low-mass WIMP dark matter with a germanium detector at a threshold of 220 eV
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