Dark Matter Search Results from a One Ton-Year Exposure of XENON1T
2018
We report on a search for
weakly interacting massive particles(
WIMPs) using 278.8 days of data collected with the XENON1T experiment at LNGS. XENON1T utilizes a liquid xenon
time projection chamberwith a fiducial mass of (1.30±0.01)
ton, resulting in a 1.0
tonyr exposure. The energy region of interest, [1.4,10.6] keVee ([4.9,40.9] keVnr), exhibits an ultralow electron recoil background rate of [82-3+5(syst)±3(stat)] events/(
tonyr keVee). No significant excess over background is found, and a profile likelihood analysis parametrized in spatial and energy dimensions excludes new parameter space for the
WIMP-nucleon spin-independent elastic
scatter cross sectionfor
WIMPmasses above 6 GeV/c2, with a minimum of 4.1×10-47 cm2 at 30 GeV/c2 and a 90% confidence level.
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