DELight: A Direct search Experiment for Light dark matter with superfluid helium

• DOI: 10.21468/scipostphysproc.12.016
• Publication Date: 2023-07-03T14:57:17Z
• Authors: Belina von Krosigk; Klaus Eitel; Christian Enss; Torben Ferber; Loredana Gastaldo; Felix Kahlhoefer; Sebastian Kempf; Markus Klute; Sebastian Lindemann; Marc Schumann; Francesco Toschi; Kathrin Valerius
• Keywords: ddc:620; Physics - Instrumentation and Detectors; Physics; QC1-999; FOS: Physical sciences; Instrumentation and Detectors (physics.ins-det); 530; 01 natural sciences; 620; High Energy Physics - Experiment; High Energy Physics - Experiment (hep-ex); 0103 physical sciences; Engineering & allied operations; info:eu-repo/classification/ddc/620

To reach ultra-low detection thresholds necessary to probe unprecedentedly low Dark Matter masses, target material alternatives and novel detector designs are essential. One such target material is superfluid ^44He which has the potential to probe so far uncharted light Dark Matter parameter space at sub-GeV masses. The new “Direct search Experiment for Light dark matter”, DELight, will be using superfluid helium as active target, instrumented with magnetic micro-calorimeters. It is being designed to reach sensitivity to masses well below 100 MeV in Dark Matter-nucleus scattering interactions.