Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB.
Phys Rev Lett
; 123(18): 181802, 2019 Nov 01.
Article
em En
| MEDLINE
| ID: mdl-31763884
ABSTRACT
We report direct-detection constraints on light dark matter particles interacting with electrons. The results are based on a method that exploits the extremely low levels of leakage current of the DAMIC detector at SNOLAB of 2-6×10^{-22} A cm^{-2}. We evaluate the charge distribution of pixels that collect <10e^{-} for contributions beyond the leakage current that may be attributed to dark matter interactions. Constraints are placed on so-far unexplored parameter space for dark matter masses between 0.6 and 100 MeV c^{-2}. We also present new constraints on hidden-photon dark matter with masses in the range 1.2-30 eV c^{-2}.
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MEDLINE
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En
Ano de publicação:
2019
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Article