Nuclear Recoil Calibration at Sub-keV Energies in LUX and Its Impact on Dark Matter Search Sensitivity
Physical Review Letters American Physical Society (APS) 134:6 (2025) 061002
First constraint for atmospheric millicharged particles with the LUX-ZEPLIN experiment
(2024)
Two-neutrino double electron capture of 124 Xe in the first LUX-ZEPLIN exposure
Journal of Physics G: Nuclear and Particle Physics IOP Publishing 52:1 (2024) 015103
Abstract:
The broad physics reach of the LUX-ZEPLIN (LZ) experiment covers rare phenomena beyond the direct detection of dark matter. We report precise measurements of the extremely rare decay of 124Xe through the process of two-neutrino double electron capture, utilizing a 1.39 kg × yr isotopic exposure from the first LZ science run. A half-life of T1/22ν2EC=(1.09±0.14stat±0.05sys)×1022yr is observed with a statistical significance of 8.3σ, in agreement with literature. First empirical measurements of the KK capture fraction relative to other K-shell modes were conducted, and demonstrate consistency with respect to recent signal models at the 1.4σ level.Constraints on Covariant Dark-Matter–Nucleon Effective Field Theory Interactions from the First Science Run of the LUX-ZEPLIN Experiment
Physical Review Letters American Physical Society (APS) 133:22 (2024) 221801
The data acquisition system of the LZ dark matter detector: FADR
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 1068 (2024) 169712