Search for low-mass dark matter via bremsstrahlung radiation and the Migdal effect in SuperCDMS
Abstract
We present a new analysis of previously published SuperCDMS data using a profile likelihood framework to search for sub-GeV dark matter (DM) particles through two inelastic scattering channels: bremsstrahlung radiation and the Migdal effect. By considering these possible inelastic scattering channels, experimental sensitivity can be extended to DM masses that are 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 provides overall considerably more stringent limits and excludes DM masses down to 30 MeV /c2 at 5.0 ×10-30 cm2.
- Publication:
-
Physical Review D
- Pub Date:
- June 2023
- DOI:
- 10.1103/PhysRevD.107.112013
- arXiv:
- arXiv:2302.09115
- Bibcode:
- 2023PhRvD.107k2013A
- Keywords:
-
- High Energy Physics - Experiment;
- High Energy Physics - Phenomenology
- E-Print:
- Submitted to PRD