Latest Results from the Deap-3600 Dark Matter Search with 231 Live Days at SNOLAB

DEAP-3600 is a single phase detector with 3.3 tonnes of liquid argon (LAr), operating 2 km underground at SNOLAB (in Sudbury, Ontario). A search for weakly interacting massive particles (WIMPs) has been performed with this detector, using data collected from November 2016 to October 2017, with a total live time of 231 days and an exposure of 758 tonne·years. No candidate signal events are observed in the WIMP-search region of interest, resulting in an upper limit on the spin-indepedent WIMP-nucleon cross section of 3.9×10$^{−45}$cm$^{2}$ (1.5×10$^{−44}$cm$^{2}$) for a WIMP mass of 100 GeV/c$^{2}$ (1 TeV/c$^{2}$) at 90% C.L. This is the most sensitive search performed with a LAr target for WIMPs with mass greater than 30 GeV/c$^{2}$.