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Open AccessJournal ArticleDOI

Improved WIMP-search reach of the CDMS II germanium data.

R. Agnese, +88 more
- 22 Apr 2015 - 
- Vol. 92, Iss: 7, pp 072003
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TLDR
In this article, an improved charge-pulse fitting algorithm was used to reject surface-event backgrounds in the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure.
Abstract
CDMS II data from the five-tower runs at the Soudan Underground Laboratory were reprocessed with an improved charge-pulse fitting algorithm. Two new analysis techniques to reject surface-event backgrounds were applied to the 612 kg days germanium-detector weakly interacting massive particle (WIMP)-search exposure. An extended analysis was also completed by decreasing the 10 keV analysis threshold to ∼5  keV, to increase sensitivity near a WIMP mass of 8  GeV/c^2. After unblinding, there were zero candidate events above a deposited energy of 10 keV and six events in the lower-threshold analysis. This yielded minimum WIMP-nucleon spin-independent scattering cross-section limits of 1.8×10^(−44) and 1.18×10^(−41) at 90% confidence for 60 and 8.6  GeV/c^2 WIMPs, respectively. This improves the previous CDMS II result by a factor of 2.4 (2.7) for 60 (8.6)  GeV/c^2 WIMPs.

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Journal ArticleDOI

DarkSide-20k: A 20 tonne two-phase LAr TPC for direct dark matter detection at LNGS

Craig E. Aalseth, +300 more
TL;DR: The DarkSide-20k detector as discussed by the authors is a direct WIMP search detector using a two-phase Liquid Argon Time Projection Chamber (LAr TPC) with an active mass of 23 t (20 t).
Journal ArticleDOI

The dawn of FIMP Dark Matter : A review of models and constraints

TL;DR: In this article, the authors present an overview of scenarios where the observed dark matter (DM) abundance consists of Feebly Interacting Massive Particles (FIMPs), produced nonthermally by the so-called freeze-in mechanism.
Journal ArticleDOI

Dark Matter Search Results from the PICO-2L C3F8 Bubble Chamber.

TL;DR: These data provide the most sensitive direct detection constraints on WIMP-proton spin-dependent scattering to date, with significant sensitivity at low W IMP masses for spin-independent WIMp-nucleon scattering.
Journal ArticleDOI

Low-mass dark matter search with CDMSlite

TL;DR: The SuperCDMS experiment at the Soudan Underground Laboratory was designed to directly detect weakly interacting massive particles (WIMPs) that may constitute the dark matter in our Galaxy as discussed by the authors.
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