Journal
PHYSICAL REVIEW LETTERS
Volume 123, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.123.181802
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Funding
- SNOLAB
- Canada Foundation for Innovation
- Province of Ontario Ministry of Research and Innovation
- Kavli Institute for Cosmological Physics at The University of Chicago from the Kavli Foundation
- National Science Foundation [NSF PHY-1806974]
- Mexico's Consejo Nacional de Ciencia y Tecnologia [240666]
- Direccion General de Asuntos del Personal Academico-Universidad Nacional Autonoma de Mexico (Programa de Apoyo a Proyectos de Investigacion e Innovacion Tecnologica) [IN108917]
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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 x 10(-22) Acm(-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 MeVc(-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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