Choose timezone
Your profile timezone:
Description
The nature of dark matter (DM) is one of the most important questions in physics. The LUX-Zeplin (LZ) experiment is the most sensitive dark matter search experiment to date, located 1.6 km underground at the Sanford Underground Research Facility. The experiment utilizes a two-phase time projection chamber, containing seven active tonnes of liquid xenon to search for WIMPs. A recent search extending the search window up to $270~\mathrm{keV}$, has yielded one event consistent with a nuclear recoil of $240\pm23(\text{stat})\pm23(\text{syst})~\mathrm{keV}$, which is difficult to explain with any known background, and which corresponded to a $2.6~\sigma$ global significance across the search space. I will describe the LZ data and analysis, with a particular emphasis on the effort to understand and model the high energy nuclear recoil region in light of this result.