New constraints on cosmic ray-boosted dark matter from the LUX-ZEPLIN experiment
(2025)
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 脳 yr isotopic exposure from the first LZ science run. A half-life of T1/22谓2EC=(1.09卤0.14stat卤0.05sys)脳1022yr is observed with a statistical significance of 8.3蟽, 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 1.4蟽 level.Constraints on Covariant Dark-Matter鈥揘ucleon 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