Orateur
Description
The LUX-ZEPLIN experiment is a liquid-gas dual phase time projection chamber primarily searching for dark matter in the form of weakly interacting massive particles (WIMPs). It has been collecting science data with a 7-tonne active xenon target near-continuously since 2021. LZ has reported world-leading WIMP dark matter searches, a measurement of coherent solar $^8$B neutrino scattering on nuclei, and searches for other rare processes. Recently, LZ conducted a search for dark matter interactions using higher energy nuclear recoils than predicted in a conventional elastic WIMP search, observing an event at 248 keV, in tension with our current background-only hypothesis at 2.6 $\sigma$ global significance. This talk will introduce the signal models used to motivate and conduct high energy searches as well as on the backgrounds faced at these energies.