Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB.

  title={Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB.},
  author={Alexis A. Aguilar-Arevalo and Dante Amidei and D. Baxter and Gustavo Cancelo and B A Cervantes Vergara and Alvaro E. Chavarria and Elise Darragh-Ford and Joao R. T. de Mello Neto and Juan Carlos D'Olivo and Juan Estrada and Romain Ga{\"i}or and Yann Guardincerri and T. W. Hossbach and Benjamin Kilminster and Ian Timothy Lawson and S. J. Lee and Antoine Letessier-Selvon and A. Matalon and V. B. B. Mello and Pitam Mitra and J. Molina and Stephan Paul and A. Piers and P. Privitera and K. Ramanathan and J Da Rocha and Youssef Sarkis Mobarak and Mariangela Settimo and Radom{\'i}r {\vS}m{\'i}da and R. Thomas and Javier Tiffenberg and Diego Torres Machado and Roc{\'i}o Vilar and A. Lopez Virto},
  journal={Physical review letters},
  volume={123 18},
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… 

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