New Dark Matter results from LZ

by Dr Ewan Fraser (University of Liverpool)

Tuesday 29 Sept 2026, 12:00 → 13:00 Europe/London

OLL/3-337 - Seminar Room (Liverpool Physics)

LZ has released its latest result searching an extended nuclear recoil energy window up to 270 keV with an exposure of 2.84 tonne-years. At higher nuclear recoil energies, LZ is sensitive to more complex models of WIMP-nucleon interactions including momentum transfer dependent couplings and inelastic dark matter scatters. One event was observed with characteristics consistent with a nuclear recoil of 248 ± 23 (stat) ± 23 (sys) keV in a region where the known background expectation is low. LZ reports tension with a background-only hypothesis at local and global significances of 2.6σ and 3.4σ respectively. In this talk, I will outline the effective field theories used to test the high energy nuclear recoil Dark Matter hypothesis and will discuss the methods of analysis, calibration and background modelling.

Microsoft Teams meeting
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