Light Dark Matter Probes and ReD's Recent Results
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Abstract
One of the goals of the Recoil Directionality Experiment (ReD) is to measure the ionization yield of Argon ($Q^{NR}_y$) at very low nuclear recoil energies. Here we describe how we achieved this goal by analysing neutron interactions in a dual-phase Liquid Argon (LAr) Time Projection Chamber, in the 2-10 keV recoil energy region. This is a crucial measurement for light WIMP searches (below 10 GeV) in LAr. ReD's setup and the $Q^{NR}_y$ analysis using a $^{252}$Cf fission source are shown as well as how it improved the current best constraints from DarkSide\_50 experiment. We will present the next stage of our experiment, ReD+, for which we will use a 2.5 MeV neutron generator. This upgrade will allow us to improve our results down to 0.2 keV. The ReD experiment is part of DarkSide Collaboration, which aims to directly probe Dark Matter.
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Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.