Results from a Search for Light-Mass Dark Matter with a P-type Point Contact Germanium Detector
C.E. Aalseth, P.S. Barbeau, N.S. Bowden, B. Cabrera-Palmer, J., Colaresi, J.I. Collar, S. Dazeley, P. de Lurgio, G. Drake, J.E. Fast, N., Fields, C.H. Greenberg, T.W. Hossbach, M.E. Keillor, J.D. Kephart, M.G., Marino, H.S. Miley, M.L. Miller, J.L. Orrell, D.C. Radford, D. Reyna
TL;DR
This paper reports on low-energy spectrum features observed in a germanium detector, introduces a surface event rejection technique, and discusses potential dark matter signals and constraints based on the data.
Contribution
It presents a new surface event rejection method and analyzes low-energy events for dark matter detection in germanium detectors.
Findings
Observation of cosmogenic peaks in the spectrum
Detection of excess bulk-like events below 3 keVee
Constraints on dark matter explanations for DAMA/LIBRA
Abstract
We report on several features present in the energy spectrum from an ultra low-noise germanium detector operated at 2,100 m.w.e. By implementing a new technique able to reject surface events, a number of cosmogenic peaks can be observed for the first time. We discuss several possible causes for an irreducible excess of bulk-like events below 3 keVee, including a dark matter candidate common to the DAMA/LIBRA annual modulation effect, the hint of a signal in CDMS, and phenomenological predictions. Improved constraints are placed on a cosmological origin for the DAMA/LIBRA effect.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.