WIMP Dark Matter Search using a 3.1 Tonne-Year Exposure of the XENONnT Experiment

2025/02/25 by E Aprile, Aprile, E., J. Aalbers +273 · 33 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Atomic and Subatomic Physics Research

paper · pdf · doi:10.48550/arxiv.2502.18005

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 \mathrmkeV_NR, 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.

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