We report on a search for weakly interacting massive particle (WIMP) dark matter (DM) via elastic DM-xenon-nucleus interactions in the XENONnT experiment. We combine datasets from the first and second science campaigns resulting in a total exposure of 3.1 tonne-years. In a blind analysis of nuclear recoil events with energies above 3.8 keVNR, we find no significant excess above background. We set new upper limits on the spin-independent WIMP-nucleon scattering cross section for WIMP masses above 10 GeV/c2 with a minimum of 1.7×10-47 cm2 at 90% confidence level for a WIMP mass of 30 GeV/c2. We achieve a best median sensitivity of 1.4×10-47 cm2 for a 41 GeV/c2 WIMP. Compared to the result from the first XENONnT science dataset, we improve our sensitivity by a factor of up to 1.8.
WIMP Dark Matter Search Using a 3.1 Tonne-Year Exposure of the XENONnT Experiment
Aprile E.Membro del Collaboration Group
;D'Andrea V.Membro del Collaboration Group
;Di Donato C.Membro del Collaboration Group
;Ferella A. D.Membro del Collaboration Group
;Lombardi F.Membro del Collaboration Group
;Macolino C.Membro del Collaboration Group
;Melchiorre A.Membro del Collaboration Group
;
2025-01-01
Abstract
We report on a search for weakly interacting massive particle (WIMP) dark matter (DM) via elastic DM-xenon-nucleus interactions in the XENONnT experiment. We combine datasets from the first and second science campaigns resulting in a total exposure of 3.1 tonne-years. In a blind analysis of nuclear recoil events with energies above 3.8 keVNR, we find no significant excess above background. We set new upper limits on the spin-independent WIMP-nucleon scattering cross section for WIMP masses above 10 GeV/c2 with a minimum of 1.7×10-47 cm2 at 90% confidence level for a WIMP mass of 30 GeV/c2. We achieve a best median sensitivity of 1.4×10-47 cm2 for a 41 GeV/c2 WIMP. Compared to the result from the first XENONnT science dataset, we improve our sensitivity by a factor of up to 1.8.Pubblicazioni consigliate
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