September 19, 2023
Journal Article
Search for Low-mass Dark Matter via Bremsstrahlung Radiation and the Migdal Effect in SuperCDMS
Abstract
In this paper, we present a re-analysis of SuperCDMS data using a prole likelihood approach to search for sub-GeV dark matter particles (DM) through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By considering possible inelastic scattering channels, experimental sensitivity can be extended to DM masses that would otherwise be undetectable through the DM-nucleon elastic scattering channel, given the energy threshold of current experiments. We exclude DM masses down to 220 MeV=c2 at 2:7 10-30 cm2 via the bremsstrahlung channel. The Migdal channel search excludes DM masses down to 30 MeV=c2 at 5:0 10-30 cm2.Published: September 19, 2023