First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment

(LUX-ZEPLIN Collaboration)

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The LUX-ZEPLIN experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, South Dakota, USA. This Letter reports results from LUX-ZEPLIN's first search for weakly interacting massive particles (WIMPs) with an exposure of 60 live days using a fiducial mass of 5.5 t. A profile-likelihood ratio analysis shows the data to be consistent with a background-only hypothesis, setting new limits on spin-independent WIMP-nucleon, spin-dependent WIMP-neutron, and spin-dependent WIMP-proton cross sections for WIMP masses above 9 GeV/c2. The most stringent limit is set for spin-independent scattering at 36 GeV/c2, rejecting cross sections above 9.2×10-48 cm at the 90% confidence level.

Original languageEnglish (US)
Article number041002
JournalPhysical review letters
Issue number4
StatePublished - Jul 28 2023

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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