Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB

By A. Aguilar-Arevalo, D. Amidei, X. Bertou, M. Butner, G. Cancelo, A. V'azquez, B. Vergara, A. Chavarria, C. Chavez, J. M. Neto and 28 more. 2016

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We present results of a dark matter search performed with a 0.6 kg d exposure of the DAMIC experiment at the SNOLAB underground laboratory. We measure the energy spectrum of ionization events in the bulk silicon of charge-coupled devices down to a signal of 60 eV electron equivalent. The data are consistent with radiogenic backgrounds, and constraints on the spin-independent WIMP-nucleon elastic-scattering cross section are accordingly placed. A region of parameter space relevant to the potential signal from the CDMS-II Si experiment is excluded using the same target for the first time. This result obtained with a limited exposure demonstrates the potential to explore the low-mass WIMP region (<10 GeV c-2) with the upcoming DAMIC100, a 100 g detector currently being installed in SNOLAB.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/69358843e85386ae44f98ac10eb16ff3d1c2fd6b

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In Nuclear and High Energy Physics

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Dark matter direct-detection experiments (2015, methodology): “es show that the levels are suciently low to reach a competitive sensitivity at low WIMP masses. DAMIC detectors with a total mass of 5.8g have been used to derive exclusion limits at low WIMP masses[383] (see gure15) and competitive constrains in searches for eV-scale hidden photons[384]. Currently”