OKC colloquia

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

Name: First Dark Matter Search Results From the LUX-ZEPLIN (LZ) Experiment
Start: 2022-12-13T13:15:00+01:00
End: 2022-12-13T14:15:00+01:00
Location: AlbaNova Main Building

by Matthew Szydagis

Tuesday 13 Dec 2022, 13:15 → 14:15 Europe/Stockholm

FB53 (AlbaNova Main Building)

FB53

AlbaNova Main Building

Description

The LUX-ZEPLIN (LZ) experiment is a dark matter detector centered on a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility in Lead, SD.

I will report on the results from LZ’s first search for Weakly Interacting Massive Particles (WIMPs) with an exposure of 60 live-days using a fiducial mass of 5.5 tonnes. A profile-likelihood ratio (PLR) 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/c^2.

The most stringent limit is set for spin-independent scattering at 30 GeV/c^2, excluding cross-sections above 5.9 × 10^−48 cm^2 at the 90% confidence level.