Search for low-mass WIMPs in a 0.6 kg day exposure of the DAMIC experiment at SNOLAB SEARCH for LOW-MASS WIMPs in A 0.6 KG DAY ... A. AGUILAR-AREVALO et al.

AGUILAR-AREVALO, A.; AMIDEI, D.; BERTOU, X.; BUTNER, M.; CANCELO, G.; CASTAÑEDA VÁZQUEZ, A.; CERVANTES VERGARA, B.A.; CHAVARRIA, A.E.; CHAVEZ, C.R.; DE MELLO NETO, J.R.T.; D'OLIVO, J.C.; ESTRADA, J.; FERNANDEZ MORONI, G.; GAÏOR, R.; GUARDINCERRI, Y.; HERNÁNDEZ TORRES, K.P.; IZRAELEVITCH, F.; KAVNER, A.; KILMINSTER, B.; LAWSON, I.; LETESSIER-SELVON, A.; LIAO, J.; MELLO, V.B.B.; MOLINA, J.; PEÑA, J.R.; PRIVITERA, P.; RAMANATHAN, K.; SARKIS, Y.; SCHWARZ, T.; SENGUL, C.; SETTIMO, M.; SOFO HARO, M.; THOMAS, R.; TIFFENBERG, J.; TIOUCHICHINE, E.; TORRES MACHADO, D.; TRILLAUD, F.; YOU, X.; ZHOU, J.

Physical Review D

American Physical Society

Año: 2016 vol. 94

2470-0010

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 (